Thermal Endurance Research Articles

Perfection of Fe–C–Si–Мn–Сr–W–V system flux-cored wire composition for surfacing of hot rolling mill rollers by introducing titanium in it

Rollers for hot rolling mills are hardened by surfacing operation by flux-cored wire ПП-Нп-35В9Х3СФ due to GOST 26101–84. The deposited layer has a high resistivity against abrasion, but its thermal endurance is comparatively low, therefore rollers surfaced by this type of wire often failed because of formation of fire crack network and spalling. It was established that the structure nonuniformity of the deposited metal can be decreased by introducing of titanium into the flux-cored wire. The effect of introducing titanium into flux-cored wire of the Fe–C–Si–Мn–Сr–W–V system on the properties of the deposited layer has been studied. It was shown that metal structure with the addition of titanium represents martensite formed within the boundaries of the former austenite grain, a small amount of residual austenite in the form of separate areas and thin layers of δ-ferrite. The microstructure of the samples contains a carbide network. An increase in the titanium content in the deposited layer contributes to a decrease in the size of the martensite needles, as well as the size of the former austenite grain. The microstructure of the samples contains medium-acicular and fine-acicular martensite. The size of the martensite needles varies from 2 to 9 microns. It was established that introduction of titanium in the composition of the flux-cored wire in an amount of 0.02–0.13% increases the hardness of the deposited layer and reduces the abrasion of the samples.

Effects of molecular structure of polymeric surfactant on its physico-chemical properties, percolation and enhanced oil recovery

Polymeric surfactant can simultaneously thicken aquous phase and reduce water–oil interfacial tension (IFT), which makes it present a great application prospect in the oilfield taword enhanced oil recovery (EOR). There are two kinds of polymeric surfactant with different molecular structures are commonly used to realize the salt resistance, thermal endurance and shear resistance. However, the influence of the molecular structure of polymeric surfactant on their properties related on EOR are not well understood. In the work, we synthesized two kinds of polymeric surfactants with different molecular structure which respectively named intermolecular association molecule (IAM) and rigid chain molecule (RCM). Their physico-chemical properties, porous media transportation and EOR are compared with a series of experiments. It is found that the hydrodynamic characteristic sizes and retention of IAM are higher than those of RCM via the membrane filtration test and nuclear magnetic resonance (NMR) scan. These features make IAM have a larger resistance factor and residual resistance factor than RCM and hydrolyzed polyacrylamide (HPAM) in the same viscosity. Compare to HPAM with shear thinning, RCM presents a Newtonian fluid region and IAM presents a shear thickening region when the shear rate is lower than 1 s−1. The spatial structure of IAM can pack oil drop into its network, which make it easy to form oil-in-water-in-oil (O/W/O) emulsions. Moreover, the concentration and water–oil ratio (WOR) rarely affect the stability of IAM emulsions once the intermolecular association generated. The increamental oil recovery factor of IAM is 17.5% after water flooding in the three-layer core flooding experiments with the permeability of 500 mD, 1500 mD and 3000 mD at 55℃, which is higher than that of 14.5% for RCM and 11.4% for HPAM.

Control of a Switched Mode Fuel Thermal Management System

A novel flexible fuel thermal management architecture with a switched mode control strategy is proposed that provides a framework for increasing the thermal endurance of aircraft that use fuel as a heat sink. Multiple flow topologies within this architecture can be realized by using two valves to provide a range of fuel recycling configurations. The flexible thermal management system uses multiple modes of operation to achieve the goal of extending thermal endurance by switching between modes to achieve the best available configuration given the current operating condition. Dynamic inversion-based controllers are developed for each mode and are used to regulate the temperature at the hottest point in the system to a desired value. A high-level supervisory controller switches among four separate feedback control laws and manages the available flow paths within a fixed structure of pipes, valves, and tanks. The flexible fuel thermal management architecture and controller are tested over a range of simulated operating conditions. Under these conditions, the supervisory controller chooses a path that stores returning hot fuel to avoid overheating of aircraft systems and releases the hot fuel when excessive heat loads are no longer present. The proposed architecture allows for a large operational envelope.

High-quality nano structures fabrication on organic/inorganic hybrid thin films by using UV nanoimprint lithography

In this study, UV nanoimprint lithography (NIL) was conducted with a hybrid mixture of tin oxide and a UV-curable polymer to fabricate 1-D nanostructures on a thin film. It was confirmed through chemical and physical surface analyses that a hybrid thin film with high-resolution nanostructures had been successfully fabricated. In particular, nanostructures with an amplitude of 49.354 nm and a wavelength of 0.768 μm, which are the most similar to the mold used, were achieved at 3 min UV exposure time. Afterward, they were applied to a liquid crystal (LC) device as an alignment layer, with which uniform and homogeneous LC alignment were achieved due to the anisotropic characteristics and geometric restrictions caused by fabricated nano structures. In addition, a high thermal budget was obtained due to the thermal endurance of the hybrid thin films with an LC alignment performance of a UV exposure time of 3 min. Furthermore, the electro-optical performance under this condition was superior to LC devices with conventional rubbed polyimide layers From the results, it was determined that using the UV-NIL process on a hybrid mixture of tin oxide and a UV-curable polymer created high-resolution 1-D nano structures on films that can be used this as LC alignment layers with strong potential for high-quality LC applications.

Domain Engineered Lead-Free Ceramics with Large Energy Storage Density and Ultra-High Efficiency under Low Electric Fields.

Dielectric energy storage materials are becoming increasingly popular due to their potential superiority, for example, excellent pulse performance as well as good fatigue resistance. Although numerous studies have focused on lead-free dielectric materials which possess outstanding energy storage characteristics, the results are still not satisfying in terms of achieving both large discharging energy density (Wd) and high discharging efficiency (η) under low electric fields, which is crucial to be conducted in miniatured electronic components. Here, we adopt the strategy of domain engineering to develop sodium bismuth titanate (Bi0.5Na0.5TiO3)-based ceramics employed in the low-field situation. Remarkably, a large Wd of 2.86 J/cm3 and an ultrahigh η of 90.3% are concurrently obtained in 0.94(Bi0.5Na0.5)0.65(Ba0.3Sr0.7)0.35TiO3-0.06 Bi(Zn2/3Nb1/3)O3 system when the electric field is as low as 180 kV/cm. Additionally, the ceramic shows brilliant thermal endurance (20-160 °C) and frequency stability (0.1-100 Hz) with high Wd (>1.48 J/cm3) together with an ultra-high η (>90%). What's more, the ceramic displays a fast charge-discharge time (t0.9 = 109.2 ns). The piezoresponse force microscopy (PFM) results reveal that the introduced Bi(Zn2/3Nb1/3)O3 disrupts the microdomains of (Bi0.5Na0.5)0.65(Ba0.3Sr0.7)0.35TiO3 ceramics and promotes the formation of nanodomains, leading to enhanced energy storage properties. The current work may arouse interest in developing low-field high-performing dielectric capacitors for energy storage application.

Discrete interfacial effects of organic lead halide perovskite coating on magnetic underlayer: MAPbBr[formula omitted]/FePd heterostructure

Recent studies have shown promising results regarding the power conversion efficiency, band-gap tunability, and interfacial charge carrier ability of organic lead halide perovskites. In light of these fundamental abilities, we fabricated a heterostructure: MAPbBr3 spin-coated on an FePd alloy layer, consisting of both magnetic and optical capabilities. The perovskite’s discrete coverage across the FePd underlayer was confirmed by atomic force microscope, as made up of separate disc-like nanostructures that stand at ∼400 nm in height and a size width of up to ∼2 µm. We studied the thermal endurance and the inter-facial diffusion stability between MAPbBr3 and FePd alloy by post-annealing it to temperatures ranging 100–170 ∘C. The instable interfacial effects of perovskite/FePd was observed at 120 ∘C, as indicated by the drastic reduction in magnetic coercivity of FePd and the photoluminescence of MAPbBr3. This interfacial diffusion behavior between perovskite and FePd advances as the post-annealing temperature reaches 170 ∘C, supported by the enhanced noise to Kerr signal ratio.

Tailoring energy-storage performance in antiferroelectric PbHfO3 thin films

Among all dielectrics, antiferroelectric (AFE) materials have attracted wide attention due to the excellent energy-storage performance. In this paper, PbHfO3 (PHO) AFE films were prepared for the first time and the microstructure, AFE property and energy-storage performance were studied. X-ray diffraction analysis indicated that annealing temperature played a key role in the crystallinity and phase composition. Due to the coexistent of fine grains and amorphous phase, PHO AFE films annealed at 650 °C displayed not only optimal energy-storage density and energy efficiency, but also excellent thermal stability and fatigue endurance. Compared with films annealed at 750 °C, the recoverable energy-storage density and energy efficiency in 650 °C annealing samples increased by 50% and 100%, respectively. These results demonstrate that PHO film is a promising candidate for applications in power electronics systems.

Photoresist as a choice of molecularly thin gate dielectrics in graphene-based devices

Ultra-thin polymeric dielectrics are of great interest for the ever-increasing development of high-performance novel electronics. Up to date, the fabrication of polymer layers as thin as few nanometers is still an extremely demanding process. Here, we report a facile method to fabricate molecularly thin (4 nm–5 nm) plasma-hardened photoresist (PHPR) layers by applying O2 plasma to treat the surface of the photoresist (SPR 220) to cross-link the constituent novolac resin. It is found that such ultra-thin PHPR layers also possess molecular-scale smoothness, superior chemical resistance, and thermal endurance. Furthermore, we develop an in situ transfer technique that is compatible with the planar process to stabilize the patterning of the PHPR layers. By using PHPR layers as the gate dielectric and tunneling barrier (breakdown strength up to 500 kV/mm), a graphene-PHPR-graphene (G-PHPR-G) sandwich-like structure is demonstrated, exhibiting a high photo-responsivity (>13 A/W) under low operating voltages (<1 V), which enables the ultra-thin PHPR layers to be a very promising candidate for the dielectrics in low-power, flexible electronic applications.

Optimization of asymmetric reference structures through non-evenly layered synthetic antiferromagnet for full bridge magnetic sensors based on CoFeB/MgO/CoFeB

Industrial sensor applications rely on the implementation of full Wheatstone bridge architectures, demanding the development of low-cost and mass production methods of magnetic tunnel junctions (MTJ) based on CoFeB/MgO/CoFeB. In particular, monolithic bridge microfabrication has been demonstrated through the double deposition of MTJ stacks engineered by asymmetric reference layers with non-evenly layered synthetic antiferromagnet (SAF) structures. However, extending the standard double magnetic layered SAF into a triple magnetic multilayer system brings critical changes in the overall performance of the reference structure, which directly influences the magnetic stability of the device. Consequently, a theoretical model of a triple magnetic layered AF/SAF structure was developed to support the understanding of the magnetic response of the reference layers, aiming to improve the magnetic stability around zero field. A full MTJ Wheatstone bridge incorporating the optimized double and triple reference structures was microfabricated with a linear and hysteresis-free response. Furthermore, a high thermal endurance of both structures was verified through the measurement of the magnetotransport behavior of each type of MTJ structure within a reversible magnetic field range of ±2 kOe and a temperature sweep from room temperature up to 200 °C.

Tuning the Ablation, Thermal and Mechanical Characteristics of Phenolic Resin Reinforced EPDM Ultra-High Temperature Insulation

The present research reports the influences of variant phenolic resin concentrations on the thermo-mechanical and ablation characteristics of ethylene propylene diene monomer (EPDM) elastomer. Backface temperature acclivity (BTA), charring rates, and insulation indexes were executed for the fabricated composite specimens. It was noticed that BTA was enhanced while linear/radial/mass ablation rates were significantly diminished with increasing concentration of phenolic resin (PR) in base matrix (elastomeric polymer). The composite (30wt%PR/EPDM) has 25% high thermal endurance compared to virgin EPDM composite. Thermal conductivity was increased with increasing PR to EPDM ratio. PR incorporation has remarkably enhanced the ultimate tensile strength of the EPDM elastomer. An efficient improvement in elastomeric hardness was also observed with increasing PR contents in EPDM matrix. Scanning Electron Microscopy (SEM) results showed the porosity generation and polymer melting during ablation.

Controlling Interfacial Exchanges in Liquid Phase Bonding Enables Formation of Strong and Reliable Cu–Sn Soldering for High-Power and Temperature Applications

Developing solder joints capable of withstanding high power density, high temperature, and significant thermomechanical stress is essential to further develop electronic device performances. This study demonstrates an effective route of producing dense, robust, and reliable high-temperature Cu–Sn soldering by modifying the interfacial exchange during a transient liquid phase bonding (TLP) process. Our approach thus relies on altering internal phenomena (diffusion and transport of reactive species) rather than classical external TLP bonding parameters (e.g., time, temperature, and pressure). By adding a Cu3Sn-coated layer between Cu and Sn before the TLP process, fast dissolution of Cu in liquid Sn is achieved, altering undesired Cu6Sn5 scallop grain impingement and promoting their uniform growth within the liquid. A bonding and pore formation mechanism of the solder with or without the Cu3Sn-coated layer is proposed based on experimental and theoretical analysis. The developed TLP joint possesses a shear stress resistance of more than 80 MPa with a thermal cycle endurance superior to 1200 (−45–180 °C), making it highly reliable compared to a classical solder joint with shear and thermal cycling resistances of 45 and 500 MPa, respectively. The developed approaches thus provide an easy, affordable, and scalable method of producing a high-temperature and durable Cu–Sn joint for high-power module applications.

Daylight-White-Emitting and Abnormal Thermal Antiquenching Phosphors Based on a Layered Host SrIn2(P2O7)2.

Single-phase white-emission phosphors possess a judicious usage potential in phosphor-converted white-light-emitting diodes (WLEDs). Recently, numerous efforts have been made toward the development of new patterns of white-emitting phosphors that achieve excellent quantum yield, superior thermal stability, and applaudable cost effectiveness of WLEDs. Finding suitable single-component white phosphor hosts to provide an ideal local environment for activators remains urgent. Inspired by the original discovery of the promising host MgIn2(P2O7)2 (MIP) and its structural dependence on alkali-metal cations, we synthesized a brand-new phosphor host, SrIn2(P2O7)2 (SIP), via the traditional solid-state reaction. Its crystal structure was determined using an ab initio analysis and the Rietveld method. It belongs to a monoclinic unit cell with the space group C2/c. Besides, SIP exhibits a special layered three-dimensional framework in which the monolayer [SrO10]∞ was surrounded by a bilayer [In2P4O14]∞ made of the InO6 octahedra and P2O7 groups. A series of pure SIP:Tm3+,Dy3+ phosphors with tunable blue-white-yellow emission were prepared by adjusting the dopant concentration and utilizing the Tm3+-Dy3+ energy transfer. The daylight-white-emitting phosphor SIP:0.01Tm3+,0.04Dy3+ (the correlated color temperature is 4448 K) exhibits an abnormal thermal antiquenching property, and the emission intensity of 423 K reaches 103.7% of the initial value at 300 K. On the basis of the temperature-dependent lattice evolution and microenvironment analysis, the reduction of β and lattice distortion can lead to lower asymmetry of the activators and benefit the compensation of trapped-electron thermal activation. In this work, an integration study was carried out on the crystal structure of the new matrix, the occupation of the luminescent center, the interaction of different activators in the host, and the distortion degree of the local structure for the activators, which is of great practical sense for producing a novel single-matrix white phosphor possessing superior thermal endurance for UV-light-stimulated WLEDs.

Thermal insulation fibers with a Kevlar aerogel core and a porous Nomex shell.

Kevlar aerogel fibers which inherit the aerogel's brilliant properties of low density, high porosity and large surface area are promising candidates for thermal insulation applications in textiles. To enhance the mechanical strength of Kevlar aerogel fibers, an extra Nomex shell was introduced by a simple coaxial-wet-spinning approach. The resultant coaxial fibers were observed to have a Kevlar aerogel core and a porous Nomex shell. Besides, there also formed an air gap between the core and the shell. This multi-layered coaxial structure with numerous pores inside contributes to the excellent thermal insulation performance of the fibers and their fabrics. The temperature differences between the hot plate and the outer surface of the fabrics were measured to be as high as 80 °C when exposed to a temperature of 300 °C. In addition, these fibers also performed well in thermal stability, and almost did not decompose before 380 °C. Not only that, the breaking strength of the Nomex shell can be up to twice that of the Kevlar core, resulting in a significant improvement in the fiber's mechanical strength. It can be envisaged that the developed coaxial fibers with excellent thermal insulation and endurance properties as well as improved mechanical strength may have broad prospects for thermal insulation at high temperatures.

Combined Zr and Y phosphate coatings reinforced with chemically anchored B2O3 for the oxidation inhibition of carbon fiber

The use of carbon fiber-based composites in high-temperature environments has been hindered due to the inferior oxidation resistance of standard carbon fiber. Protective coatings comprised of refractory ceramics have served in enhancing the thermal endurance of carbon fiber significantly. Although zirconium and yttrium-based materials have been highly studied on their refractory characteristics, phosphate-based thermal barrier systems are scarce. Herein, we report the oxidation retardation capability of a B2O3-chemically anchored, Zr3(PO4)4/YPO4 coating system on carbon fiber. In-situ, sol-gel-developed coatings with varying thicknesses and constructs were investigated for morphology, crystallography, composition, mechanical properties and thermal integrity. A uniquely consolidated B2O3@Zr3(PO4)4/YPO4 molecular arrangement was indicated in coatings by infra-red and X-ray spectroscopy. Ultimately, superior oxidation protection with an enhancement of ~180 °C over uncoated fiber was exhibited by the integrated nanocoatings, indicating its potential suitability for thermal shielding of carbon-based composites at temperatures in the range of 900–1000 °C. The exhibited improvement in thermal performance was attributed to the fortification provided by the coordinated B2O3 network on the fundamental Zr3(PO4)4/YPO4 system.

Effects of Supplemented Shengmai San (SMS) on Blood Biochemistry and HSP72 Expression in Peripheral Blood of Flying-saucer Athletes before and after High Temperature Training

Objective: The purpose of this paper is to study the effects of supplemented Shengmai San on the expression of heat shock protein 72 (HSP72) and blood biochemistry in peripheral blood of flying-saucer athletes before and after high temperature training, so as to provide experimental basis for enhancing thermal endurance and preventing heat disease of flying-saucer athletes with anti-heat disease drugs. Methods: 24 flying-saucer athletes from Zhejiang province were selected and divided into two groups, including control group and traditional Chinese medicine group with 12 people in each group. Among them, those who did not drink supplemented Shengmai San were in the control group, while those who drank it were in the traditional Chinese medicine group. During summer training, high temperature training task was carried out for 2 weeks. Flying-saucer athletes in traditional Chinese medicine group were given supplemented Shengmai San before training every morning and afternoon. Peripheral venous blood of each group was extracted before experiment and 2 weeks later and lymphocyte HSP72 content, blood routine and biochemical indexes were determined respectively. Results: Before the experiment, there were no abnormal phenomenon blood routine, biochemical test value and HSP72 expression in the control group and the traditional Chinese medicine group. After comparison, there was no significant difference (P>0.05). After the high temperature training, the expression of HSP72 in the Chinese medicine group was significantly higher than that before the training and control group (P<0.05). There were significant differences in white blood cell count before and after the experiment (P<0.05). Conclusion: Taking supplemented Shengmai San can significantly increase expression of HSP72 in up-regulation of flying saucer athletes after thermal stimulation, thus enhancing thermal tolerance and preventing thermal diseases.

Tribological Behavior and Thermal Stability of Thermoplastic Polyimide/Poly (Ether Ether Ketone) Blends at Elevated Temperature

In this study, a series of thermoplastic polyimide (TPI) reinforced poly (ether ether ketone) (PEEK) blends with varied TPI content were prepared by a hot-pressing method. Friction and wear tests were conducted with a pin-on-disk contact configuration with an elevated temperature friction and wear tester. The morphologies of the worn surfaces were observed by scanning electron microscopy and a non-contact three-dimensional surface profiler. The crystalline structure, thermal properties, and mechanical properties were comparatively investigated. The results showed that the thermal endurance, friction-reducing capacity, and wear resistance were improved with the addition of TPI. It was found that the wear rate of the blends was dominated by the wear temperature rather than the wear tester contact pressure. The wear mechanism transferred from abrasive wear to adhesive wear when the environmental temperature exceeded the glass transition temperature. We suggest the 30% TPI/PEEK blends can be applied as a solid lubricant at elevated temperatures due to its optimum balance between compressive strength, thermal stability, and wear performance. The results could help to provide some experimental evidence for the broader application of various polymer blends affected by their wear resistance at elevated temperatures.

Pressure-Engineered Optical and Charge Transport Properties of Mn2+/Cu2+ Codoped CsPbCl3 Perovskite Nanocrystals via Structural Progression.

In this work, compared with the corresponding pure CsPbCl3 nanocrystals (NCs) and Mn2+-doped CsPbCl3 NCs, Mn2+/Cu2+-codoped CsPbCl3 NCs exhibited improved photoluminescence (PL) and photoluminescence quantum yields (PL QYs) (57.6%), prolonged PL lifetimes (1.78 ms), and enhanced thermal endurance (523 K) as a result of efficient Mn2+ doping (3.66%) induced by the addition of CuCl2. Furthermore, we applied pressure on Mn2+/Cu2+-codoped CsPbCl3 NCs to reveal that a red shift of photoluminescence followed by a blue shift was caused by band gap evolution and related to the structural phase transition from cubic to orthorhombic. Moreover, we also found that under the preheating condition of 523 K, such phase transition exhibited obvious morphological invariance, accompanied by significantly enhanced conductivity. The pressure applied to the products treated with high temperature enlarged the electrical difference and easily intensified the interface by closer packaging. Interestingly, defect-triggered mixed ionic and electronic conducting (MIEC) was observed in annealed NCs when the applied pressure was 2.9 GPa. The pressure-dependent ionic conduction was closely related to local nanocrystal amorphization and increased deviatoric stress, as clearly described by in situ impedance spectra. Finally, retrieved products exhibited better conductivity (improved by 5-6 times) and enhanced photoelectric response than those when pressure was not applied. Our findings not only reveal the pressure-tuned optical and electrical properties via structural progression but also open up the promising exploration of more amorphous all-inorganic CsPbX3-based photoelectric applications.

Investigation of High-Temperature Stability and Thermal Endurance of Silicone Potting Compound by Thermo-Gravimetric Analysis

The high-temperature stability and thermal life of silicone resin-based potting compound (SC-3), used in the aerospace application for electrical insulation, is investigated Thermo-Gravimetry Analysis (TGA) in an inert environment. Nonisothermal TGA is performed in the temperature range of 30 °C to 900 °C at 10, 20, and 30 °C / min heating rates. The kinetic parameters such as activation energy and pre-exponential factor are obtained by the model-free method proposed by Kissinger-Akahira-Sunose (KAS) and Flynn Wall Ozawa (FWO) at various degree of conversion. The thermal degradation of the SC-3 compound is observed in the temperature range of 350 °C to 580 °C, and thermal endurance or time of failure of potting compound SC-3 is estimated as per ASTM E1877 standard. The results reveal that the potting compound SC-3 can be safely used continuously at 100 °C and for ~3.6 min at 350 °C. Experimental results are also useful to understand the degradation mechanism of the SC-3 compound.

Enzyme immobilization on glass fiber membrane for detection of halogenated compounds

Enzyme immobilization using inorganic membranes has enticed increased attention as they not only improve enzyme stability, but also furnish user-friendly biodevices that can be tailored to different applications. Herein, we explored the suitability of the glass fiber membrane for enzyme immobilization and its application for halocarbon detection. For this, halohydrin dehalogenase (HheC) and bovine serum albumin were crosslinked and immobilized on a glass fiber membrane without membrane functionalization. Immobilized HheC exhibited higher storage stability than its free counterpart over 60 days at 4 °C (67% immobilized vs. 8.1% free) and 30 °C (77% immobilized vs. 57% free). Similarly, the thermal endurance of the immobilized HheC was significantly improved. The practical utility of the membrane-immobilized enzyme was demonstrated by colorimetric detection of 1,3-dichloro-2-propanol (1,3-DCP) and 2,3-dibromo-1-propanol (2,3-DBP) as model analytes. Under optimized conditions, the detection limits of 0.06 mM and 0.09 mM were achieved for 1,3-DCP and 2,3-DBP, respectively. The satisfactory recoveries were observed with spiked river and lake water samples, which demonstrate the application potential of immobilized HheC for screening contaminants in water samples. Our results revealed that the proposed frugal and facile approach could be useful for enzyme stabilization, and mitigation of halocarbon pollution.

Giant energy storage density in lead-free dielectric thin films deposited on Si wafers with an artificial dead-layer

High-performance lead-free thin-film capacitors deposited on the silicon (Si) wafers with large energy storage density ( W ) and high reliability are strongly attractive in the modern electrical and electronic devices. Here, an ultrahigh W was achieved in the Ba 0.3 Sr 0.7 Zr 0.18 Ti 0.82 O 3 (BSZT) relaxor ferroelectric thin films deposited on the Si wafers with the help of an ultrathin Ca 0.2 Zr 0.8 O 1.8 (CSZ) artificial “dead-layer” simultaneously possessing high resistivity, wide band gap and high permittivity among linear dielectrics. As the CSZ was implanted, the W of the Ba 0.3 Sr 0.7 Zr 0.18 Ti 0.82 O 3 (BSZT) thin films was greatly increased from 64.9 J/cm 3 to 89.4 J/cm 3 , which is comparable to the best W of thin film deposited on expensive single crystal substrates, and is the largest one reported so far than those of lead-free thin films deposited on the Si wafers, and even for lead thin films. Due to the formation of ultrahigh electrons injection barrier (3.92 eV) between the interface of the CSZ dead layer and the Au top electrode, the Schottky emission of the BSZT thin films under high electric field and at high temperatures was effective suppressed, which is responsible for the greatly improved dielectric breakdown strength and thermal stability. Moreover, the fatigue endurance was also enhanced. It is concluded that the implantation of the CSZ artificial dead-layer could be used as a universal-simple-effective strategy to improve the electrical performances of ferroelectric materials working in the harsh environment of high electric field. With the help of an ultrathin Ca 0.2 Zr 0.8 O 1.8 artificial “dead-layer”, the energy storage properties of the BSZT thin films was greatly improved. The implantation of the new artificial dead-layer could be used as a universal-simple-effective strategy to improve the electrical performances of ferroelectric materials working in the high electric field. • High quality lead-free thin films deposited on Si wafers were obtained. • An ultrahigh energy storage density ( W ) on Si wafers ~ 89 J/cm 3 was achieved. • Artificial Dead-layer implantation benefits the enhancement of W and DBS. • Artificial Dead-layer implantation benefits the improvement of thermal stability and fatigue endurance. • High electrons injection barrier can suppress Schottky Emission.