Full Absorption Research Articles

Reduced graphene oxide/nonwoven fabric filled honeycomb composite structure for broadband microwave absorption

The prevalence of electromagnetic pollution in daily life has led to a rapid escalation in the demand for high-performance electromagnetic absorption and protection materials. Herein, a composite material consisting of reduced graphene oxide (RGO)/nonwoven absorbent was prepared and filled into honeycomb structures. The single-layer nonwoven/honeycomb composite, with a thickness of 5 mm, demonstrates an effective absorption bandwidth (reflection loss ≤ −10 dB) reaching 12.1 GHz (5.9 GHz–18 GHz) and a minimum reflection loss of −37 dB. This is attributed to the synergistic absorption effects of conduction loss, interfacial scattering, dielectric relaxation, and multiple scattering losses. Furthermore, the bilayer composite structure demonstrates the capability to achieve full band absorption of 2 GHz–18 GHz with a thickness of only 10 mm, giving carbon materials a thin and lightweight absorption effect. In addition, the composite materials exhibit excellent mechanical properties. This study presents a new idea for the design and manufacture of broadband, lightweight, and high-performance microwave absorbers, which holds significant potential in the field of electromagnetic pollution prevention and absorption.

Ternary composite WS2/GO/Au synthesized from laser ablation and hydrothermal method for photo- and electro-chemical degradation of methylene blue dye

Photocatalysts based on two-dimensional (2D) material with full optical absorption in the visible region have gained a lot of interest as a potential method for the degradation of pollutants, but there are very few single materials that can fulfill this requirement. In this research, we are suggesting the formation of WS2/GO/Au ternary composite prepared by WS2 and GO using nanosecond laser ablation followed by adding Au using the hydrothermal method. Ultraviolet-visible (UV–Vis), Raman, x-ray diffraction (XRD) spectroscopies, and field emission scanning electron microscopy (FE-SEM) were used to investigate the microstructure, morphology, and spectroscopic properties of the samples that had been produced. The UV–Vis spectra suggest the formation of a ternary composite, and FE-SEM shows morphology as Au nanoparticles with a size ranging from 20 to 30 nm are perfectly mixed with WS2 nanosheets, which can be seen on GO sheets. SEM-Energy dispersive x-ray spectroscopic (EDS) images indicate the availability of all elements in prepared samples and the formation of a ternary composite of WS2/GO/Au. XRD and Raman spectroscopy confirm the crystalline nature of AuNPs and WS2 and suggest the transformation of GO into rGO. The prepared pristine (WS2), binary (WS2/GO), and ternary composite show the capability for methylene blue degradation under UV-light irradiation as 41.85 %, 48.26 %, and 83.17 %, while electrocatalytic degradation gives 99 % for WS2/GO/Au respectively. The improved photocatalytic activity by the multicomponent has been demonstrated by nanostructured catalysts with specific morphology due to their exceptional electron transport characteristics. The WS2/GO/Au composite is anticipated to be an encouraging photoelectric material for experimental study in the research area of photocatalysis.

Shellular SiCN ceramics with integrated structure and function realizing full electromagnetic wave absorption in the X-band

In this paper, the electromagnetic wave (EMW) absorption properties of SiCN ceramics with a shellular structure prepared by 3D printing technology (DLP) at different pyrolysis temperatures were investigated. The research shows that polarization loss and multiple reflections are the principal reasons for the improvement in sample absorption performance. The shellular structure is favorable for the multiple reflections and scattering of electromagnetic wave inside the material. The turbostratic carbon, graphitic carbon and SiC generated by pyrolysis are conducive to improving the dielectric loss of the sample, adjusting its impedance matching performance and improving its absorption performance. The RLmin of SiCN-1200 reaches − 21.12 dB (3.22 mm), and the effective band width is 4.20 GHz, covering the whole X-band. The excellent EMW absorption performance of DLP-SiCN ceramics, together with additive manufacturing, enable the integration of material, structure and function within a single component.

The influence of the Cr2O3–Mn2O3 colorants system on the spectral characteristics of R2O–PbO–SiO2 glasses

AbstractThe focus of this paper centers on an exploration of optical glasses with high transmittance within the infrared spectrum at wavelength of 1 060 nm, while concurrently demonstrating full absorption within the ultraviolet and visible spectral ranges. The paper analyzes the present state of glasses demonstrating necessary transmittance at IR range, considering their inherent strengths and limitations. In this context, an R2O–PbO–SiO2 glass system with Cr2O3–Mn2O3 colorants system emerges as the subject of this research. Research was conducted to comprehensively assess the impact of this colorant system on the glass spectral characteristics, while considering the potentially detrimental influence of FeO.The principles underlying the industrial production of these glasses are systematically elucidated and presented. It was discovered that using gas heating during the cooling phase of glass melting resulted in the disruption of the spectral homogeneity of the glass, ultimately leading to defective product outcomes. Implementing the methodology of gasless temperature reduction (inertial cooling process) before glass pouring has created a favorable environment for producing high‐quality items. Glass samples from the laboratory tests were obtained, and the researched glass was integrated into serial production.

A Resource-Based View on Individual Absorption in the Context of Multiple Team Memberships

Knowledge work—frequently characterized as nonroutine and complex—requires individuals to be deeply engrossed with or “absorbed” in their work. Notwithstanding, organizations tend to put knowledge workers in multiple teams, undermining their ability to achieve the level of absorption required to realize their full potential. We examine how knowledge workers who are operating in multiple team contexts navigate competing demands on their time on a daily basis. Based on conservation of resources theory, we posit that the time devoted to the focal team—that is, the primary team in which knowledge workers are most actively involved—fosters absorption. However, this positive relationship is moderated by the number of different team contexts and problem-solving demands that knowledge workers experience daily, as together, these contextual conditions block optimal resource utilization. To test our hypotheses, we apply hierarchical linear modelling to experience-sampling data from 140 knowledge workers surveyed over 10 consecutive working days. Our findings support the hypothesized model, suggesting that daily involvement in multiple team contexts hinders full absorption, especially if daily problem-solving demands are high. Our insights emphasize the importance of the role and potential cost of multiple team membership (MTM) for understanding knowledge workers’ optimal functioning.

Oxygen Vacancy Defect Enhanced NIR-II Photothermal Performance of BiOxCl Nanosheets for Combined Phototherapy of Cancer Guided by Multimodal Imaging.

Narrow photo-absorption range and low carrier utilization are significant barriers that restrict the antitumor efficiency of 2D bismuth oxyhalide (BiOX, X = Cl, Br, I) nanosheets (NSs). Introducing oxygen vacancy (OV) defects can expand the absorption range and improve carrier utilization, which are crucial but also challenging. In this study, a series of BiOxCl NSs with different OV defect concentrations (x = 1, 0.7, 0.5) is developed, which shows full spectrum absorption and strong absorption in the second near-infrared region (NIR-II). Density functional theory calculations are utilized to calculate the crystal structure and density states of BiOxCl, which confirm that part of the carriers is separated by OV enhanced internal electric field to improve carrier utilization. The carriers without redox reaction can be trapped in the OV, leading to great majority of photo-generated carriers promoting the photothermal performance. Triggered by single NIR-II (1064nm), BiOxCl NSs' bidirectional efficient utilization of carriers achieves synchronously combined phototherapy, leading to enhanced tumor ablation and multimodal diagnostic in vitro and vivo. It is thus believed that this work provides an innovative strategy to design and construct nanoplatforms of indirect band gap semiconductors for clinical phototheranostics.

Scalable fabrication of lightweight carbon nanotube aerogel composites for full X-band electromagnetic wave absorption

Electromagnetic waves (EMWs) from advanced electronic devices can hinder normal operation of other electronic equipment, negatively affecting their performance and cause harmful impacts on human health by breaking down DNA strands and causing cancer. In this study, we thrivingly prepared new lightweight EMW absorbing aerogel composites by first blending polyvinyl alcohol (PVA), carboxymethyl cellulose (CMC), carbon nanotube (CNT), reduced graphene oxide (rGO), and carbonyl iron (CI), followed by freeze-drying. The materials are promising for up-scale production with the current pilot-scale samples sizing 35 cm × 35 cm. The effects of CNT types, CNT, rGO, CI, and crosslinker contents on EMW absorption ability are comprehensively investigated. The obtained aerogel composites exhibit a 3D porous structure with low densities (0.088–0.210 g/cm3), high thermal stability (227 °C), and high Young's modulus (670.9 kPa) compared to past aerogels. Notably, the materials with 3.0–3.5 mm in thickness achieve the minimum reflection loss (RLmin) of up to −42 dB (99.99 % EMW energy lost) and provide coverage across the entire X-band (8.2–12.4 GHz) with RL < −10 dB, indicating a 90 % attenuation of EMW energy. Compared to commercial Ni/CNT and other existing composites, our materials boast a broader effective bandwidth of 1.2–2.2 GHz. These properties make our aerogel composites highly promising for valuable commercial use, offering lightweight, durable, and efficient EMW absorption capabilities.

A stable and efficient hydrogel/sponge solar evaporator with splendid water supply

Solar-driven interfacial evaporation is an effective and realizable way of water purification. However, a short supply of water limits the evaporation performance of evaporator greatly. Here, an integrated photothermal evaporator owning double-layer structure of hydrogel and sponge with strong water transport ability is successfully prepared by cross-linking and dopamine modification. Abundant pores and hydrophilic functional groups in hydrogel and modified sponge benefit to enhance water transport of the whole evaporator and further relieve salt accumulation. Carbon black having the advantages of low cost and full spectrum absorption is dispersed into hydrogel networks to improve the capacity of photothermal conversion. Under the illumination of 1 kW m−2, the evaporator exhibits an excellent evaporation rate of 1.71 kg m-2h−1, corresponding to an evaporation efficiency of 93.8 %. Furthermore, the evaporator shows excellent stability during 8 cycles of solar evaporation. And the evaporator demonstrates superior salt tolerance in 3.5 wt% NaCl solution during the continuous evaporation of 8 h and has an outstanding efficiency of 99.8 % in 4-NP wastewater purification. The outdoor experiment proves that the evaporator of 1 m2 can produce 7.28 L of fresh water per day, which meet the drinking water demand of two adults. The hydrogel/sponge integrated photothermal evaporator has great application potential in seawater desalination and wastewater purification.

Research on the calculation method of the reasonable utilization rate of renewable energy considering generation–grid–load–storage coordinated planning

The continuous advancement of the dual carbon goal will lead to fundamental changes in China’s energy structure, with renewable energy emerging as the dominant force in the power supply system. As the proportion of installed capacity for renewable energy continues to increase, the absorption capacity and reasonable utilization rate of renewable energy will become a concern for all sectors of society. At present, the degree of utilization of renewable energy has emerged as a significant factor limiting the development of renewable energy sources. Due to variations in the power structure, load characteristics, and flexible adjustment resources across different regions, blindly pursuing full absorption or higher utilization of renewable energy as a goal can result in increased reserve costs for the system and limited economic benefits, and hinder the development of renewable energy. Therefore, the present study develops a generation–grid–load–storage collaborative planning model aimed at achieving economic optimization by setting different renewable energy utilization rates and obtains the installed capacity of renewable energy and storage under different conditions in the planned year of Gansu Province. The economic analysis indicates that the optimal utilization rate of renewable energy in Gansu Province is projected to decrease from 100% during the period of 2024–2028 to approximately 90% from 2040 to 2060. It serves as a valuable tool for informing the planning and economic development of renewable energy and storage initiatives in Gansu Province, facilitating the achievement of its dual-carbon objectives.

The effects of different factors on obstacle strength of irradiation defects: An atomistic study

In this work we study the effects of different factors of dislocation loop on its obstacle strength when interacting with an edge dislocation. At first, the interaction model for dislocation and dislocation loop is established and the full and partial absorption mechanism is obtained. Then, the effect of temperature, size and burgers vector of dislocation loop are investigated. The relation between the obstacle strength and irradiation dose has been established, which bridges the irradiation source and microscale properties. Except that, the obstacle strength of C, Cr, Ni, Mn, Mo and P decorated dislocation loop is studied. Results show that the obstacle strength for dislocation loop decorated by alloy element decreases in the sequence of Cr, Ni, Mn, C, P and Mo, which could be used to help parameterize and validate crystal plasticity finite element model and therein integrated constitutive laws to enable accounting for irradiation-induced chemical segregation effects.

Fresh water collection strategy: Invasive plant-based cellulose aerogels for highly efficient interfacial solar evaporation

Interfacial solar steam generation (ISSG) is promising technology to solve global scarcity of freshwater resources, hence highly efficient, robust photothermal conversion materials as key components for ISSG were urgently needed. Herein, the threat of invasive plant Solidago canadensis L. (SCL) to agricultural environment and ecosystem diversity was explored and further utilization was demonstrated by stripping and purification of raw SCL to three-dimensional crosslinked SCL-based cellulose aerogel (SCL-CA) with polyethylene glycol (PEG) as green cross-linking agent. After dopamine (DA) in situ polymerized on the SCL-CA surface, PDA@SCL-CA exhibits a high evaporation rate of 2.05 kg m−2 h−1 with photothermal conversion efficiency of 95.5 % under one sun upon the customized evaporation equipment with simulated seawater. The result is much better than that of other state-of-art samples due to the unique 3D-macro interlaced structure and hierarchical microcapillary structure of overpass bridge-shaped cellulose chains. The excellent outdoor experiment further demonstrated the practical application owing to the full solar spectrum absorption, superhydrophilicity, anti-salinity, robust structure, etc. Especially, the design strategy can be universal, and PPY@SCL-CA modified with polymerized pyrrole (PPY) can also work as a highly efficient photothermal material. The mild synthesis methods and abundant sources of raw material render it possible to fabricate efficient photothermal materials on a large scale, realizing the control of biological invasive species and resource utilization. Combining with the future upgrade of evaporator components, the heat conversion efficiency, water yield, and economic benefits of the evaporator would be further improved, which has broad application prospects in alleviating the freshwater crisis.

Women’s Dilemmatic Constraints in Emerging Second-Wave Feminism, Heideggerian Ambivalence and Oscillation between Authenticity and Inauthenticity

This paper adopts Heidegger’s philosophy, its authenticity and inauthenticity in particular, to analyze ambivalent or even conflictual representations of women in emerging second-wave feminism. During the consciousness-raising stage of second-wave, women’s consciousness-raising enabled their struggles for feminist ways of living, while patriarchal society’s struggles against feminism were commonly witnessed to impose enormous constraints on women with consciousness raised, who were thirsty for employment but cringed from leaving homes to enjoy rights in the public sphere. This problem of “getting out” and “getting back” is explained by Heidegger’s existential (in)authenticity, especially the oscillation, with reference to humans’ existential structures. Authentically, to strive for economic independence, women as Dasein with feminist consciousness raised were encouraged to speak up for themselves to reclaim the long-lost authentic “Self of one’s own” by confronting the patriarchal oppression of “The They”. However, due to social constraints which exacerbated women’s fear of confrontation, women chose to live by the inauthentic status quo in average everydayness with full absorption where women largely gave up on reflecting on assigned domestic roles and on taking responsibility for feminist life-planning. This paper argues that volatile and oscillatory transitions between authenticity and inauthenticity among women constituted the ambivalent representations of struggling women, existentially due to first the temporariness of authenticity and strong pulling power of inauthenticity in the less influential emerging second-wave to render authenticity ineffective, and second the unavoidable existence of the powerful influence of “The They” – as ontologically Being-with – as patriarchal those on women to draw them back to homes.

Pyrrole-Doped Polydopamine-Pyrrole (PDA-nPY) Nanoparticles with Tunable Size and Improved NIR Absorption for Photothermal Therapy.

Polydopamine (PDA) as a melanin-like biomimetic material with excellent biocompatibility, full spectrum light absorption capacity and antioxidation property has been extensively applied in the biomedical field. Based on the high reactivity of dopamine (DA), exploiting new strategies to fabricate novel PDA-based nano-biomaterials with controllable size and improved performance is valuable and desirable. Herein, we reported a facile way to synthesize pyrrole-doped polydopamine-pyrrole nanoparticles (PDA-nPY NPs) with tunable size and enhanced near-infrared (NIR) absorption capacity through self-oxidative polymerization of DA with PY in an alkaline ethanol/H2O/NH4OH solution. The PDA-nPY NPs maintain excellent biocompatibility and surface reactivity as PDA. By regulating the volume of added PY, PDA-150PY NPs with a smaller size (<100 nm) and four-fold higher absorption intensity at 808 nm than that of PDA can be successfully fabricated. In vitro and in vivo experiments effectively further demonstrate that PDA-150PY NPs can effectively inhibit tumor growth and completely thermally ablate a tumor. It is believed that these PY doped PDA-nPY NPs can be a potential photothermal (PT) agent in biomedical application.

Optimal design and operation of the hybrid absorption-compression chiller plants - Energy and economic analysis

A hybrid network integrating absorption and compression chillers is a suitable solution to respond to the variable cooling demand in a large-scale chiller plant, in regions with multiple energy sources. However, the design and control challenges of such networks remain uncharted, lacking a comprehensive approach. This study presents a general procedure for designing a hybrid chiller network for a building with an arbitrary annual cooling demand distribution. The procedure determines the optimal configuration considering the different capacity ratios of absorption to compression chillers, chiller numbers, and arrangements. Utilizing the Particle Swarm Optimization algorithm, the optimal chiller loading distribution is found for each configuration. Life cycle cost analysis aids in selecting the optimal configuration. Simulations conducted in TRNSYS, reveal that optimal energy and economic choices depend on the natural gas and electricity price ratio. The best energy performance occurs at a low capacity ratio, while the economic trend varies with capacity ratio for different price ratios. The potential reduction in life cycle cost associated with the configuration, when compared to the full absorption baseline and the full compression baseline, can reach up to 7,210,000 $ (72.6%) and 724,000 $ (24.5%), respectively. From an environmental perspective, compared to the full absorption baseline and the full compression baseline, hybrid chiller configurations reduce the CO2 emissions for up to 899 tons (68.8%) and 52 tons (11.3%), respectively.

Evaluation and design of photothermal conversion performance for multiple “complex-morphology” nanofluids via bidirectional deep neural network

The optical absorption and scattering of plasmonic nanoparticles are crucial for optimizing photothermal conversion efficiency, which holds great potential in various applications. Evaluating the photothermal conversion performance of nanofluids with known geometry is a computationally expensive task. The design of nanofluids that exhibit optimal photothermal conversion performance poses a complex inverse problem. The necessity to explore a wide parameter space, which encompasses various factors such as the shape, size, and material of nanoparticles, contributes to this challenge. In this study, we employ a combination of machine learning with high-throughput radiative transfer calculations to conduct a comprehensive analysis of the entire photothermal conversion process for various nanofluids. The modulation of resonance absorption peaks and spectral absorption can be achieved by adjusting the shape, material constituents, and geometric parameters of nanoparticles. Meanwhile, we establish a design space dataset that encompasses 14,060 groups of nanofluids. Based on the dataset, we demonstrate as a proof of concept bidirectional deep neural network model that enables an efficient and reliable solution to both the forward and inverse problems. The results show that the absorptivity of SiO2@Au nanofluids is significantly influenced by the volume fraction, particularly when it falls within the range of 1 × 10−5 to 1 × 10−4. However, the impact is significantly reduced within the range of 1 × 10−4 to 1 × 10−3. Furthermore, the SiO2@Au nanofluids exhibit enhanced full spectral absorption characteristics at the core-shell ratio of 0.1. Our proposed model achieves a forward prediction of the solar absorption spectra with 99% accuracy and an inverse design of the geometric parameter with 93% accuracy. In comparison to the experimental results, the relative errors for the predicted and design efficiency are 0.42% and 0.82%, respectively. The design geometry parameters including the effective radius and volume fraction exhibit relative errors of 3.88% and 1.6%, respectively. This work provides a widely applicable and computationally efficient method for the evaluation and design of nanofluids in photothermal conversion.

Design and synthesis of intrinsic black polyimide with full visible-light absorption and low coefficient of thermal expansion for black flexible copper clad laminates

With the rapid growth of microelectronics and optoelectronics, the demand for black polyimides (BPIs) with exceptional comprehensive performance has increased dramatically. 3,6-diaryl-2,5-dihydropyrrolo [3,4-c]pyrrole-1,4-dione (TDPP) is a well-known organic dye that has strong visible absorption. In this study, a novel diamine (DPPTPDA) containing TDPP-based chromophore was successfully synthesized, and an intrinsic BPI (DPPTPPI) was then obtained by the polymerization of DPPTPDA with pyromellitic dianhydride (PMDA). With the introduction of TDPP-based chromophores, the light absorption of DPPTPPI is significantly red-shifted and broadened, exhibiting complete absorption in the visible range. To explore the underlying electron nature of DPPTPPI, density functional theory calculations are carried out. The result shows that the outstanding light absorption of DPPTPPI is mostly owing to the electron transitions of HOMO→LUMO+1 that occur in the TDPP-based chromophores units. Meanwhile, DPPTPPI exhibits a low coefficient of thermal expansion and excellent electrical performances. The flexible copper clad laminate based on DPPTPPI films show high solder heat resistance and peel strength. The study provides theoretical implications for the molecular design of high-performance intrinsic BPI materials targeting practical microelectronic applications.

Self-assembled WC@CN cage capture and anti-pitting effects synergize for integrated microwave absorption and corrosion protection

In the face of the current complex and changing electromagnetic environment, especially high humidity, high salt spray and other harsh environments in the ocean, the traditional microwave absorbing material (MAM) is difficult to meet its application needs, so the development of MAM adapted to the harsh marine environment is imminent. Here, we follow the concept of green synthesis and use self-assembly to prepare WC@CN (carbon nanosheets) composite material, integrated microwave absorption and corrosion protection, effective absorption bandwidth (EAB) of 5.07 GHz at an ultra-thin thickness of 1.59 mm, full band absorption from 2 to 18 GHz can be achieved by thickness regulation. The epoxy composite coating produced by blending 10 wt%WC@CN with epoxy resin has excellent corrosion resistance, which is attributed to the excellent resistance of WC to chloride ion pitting and the cage capture and barrier effects of CN, and the molecular dynamics simulations (MDs) results are also consistent with the experimental results. This work could provide new insights and strategies for high performance MAM with corrosion protection, with promising applications in the marine military equipment sector.

Full spectrum efficient solar absorption through coupling light to multiple parts of a Ti strip

Solar energy is a clean and renewable energy source with excellent exploitation potential. A three-layer structure is designed to couple light from free space and then absorb it. Simulation results show high average absorption of 98.7 % in the 400 to 3000 nm range under normal incidence. The average absorption rate for AM1.5 solar incident light source is up to 97.6 %. The designed structure matches the impedance of free space in the broadband range. Poynting vector evolution reveals that the short, medium and long wave ranges are absorbed mainly by the Ti strip's top, middle and bottom parts. This structure has a high absorption of over 98 % when changed to a centrosymmetric form, realizing polarization independence. The designed structures have the advantages of ultra-broadband, perfect absorption, high-temperature resistance, and polarization independence, which can be applied to solar thermal energy collections, thermoelectric and thermal emitters.

Solar-driven thermally regenerative electrochemical device for continuous electricity production: A thermodynamic analysis

Solar-driven thermally regenerative electrochemical (STREC) device is a promising pathway for efficient green electricity production. The potential of this device is enabled by its full solar spectrum absorption, low fabrication cost, as well as scalability in design. We propose a continuous operation STREC device with its potential assessed by a comprehensive thermodynamic model-based analysis under various device designs, material choices, and operation conditions. The understanding was then used for the optimization and operation strategies of the proposed STREC device. The highest contribution to the total heat loss is found to be the radiative heat loss of the hot cell and the sensible heat loss due to electrolyte cycling, which is dictated by the temperature differences. Concentration overpotentials take the most proportion of the electrical loss induced by the inefficient mass transfer in porous electrodes. The results reveal that STREC device with the solar absorbing and reacting multifunctional electrode can reach a solar-to-electricity efficiency of 12.67% under an optimized condition which is promising to compete with existing solar electricity production technologies. The model developed in this study also offers a fast evaluation platform for material screening, device design, and operational condition optimization.

Vat photopolymerization 3D printing gyroid meta-structural SiOC ceramics achieving full absorption of X-band electromagnetic wave

The concept of 3D printing metamaterials to produce structure-function integrated absorbing ceramics has attracted great attention. However, there is still a lack of guidance on how to design meta-structures to achieve the preparation of excellent electromagnetic (EM) absorbers. Herein, a kind of ultraviolet (UV)-curable polysiloxane (PSO) resin slurry was successfully designed. According to the results of CST simulation, the gyroid structure (GS) with good formability and high ceramic yield was obtained by vat photopolymerization (VPP). After pyrolyzed at 1100–1300 °C, the GS SiOC metamaterials with a density of 1.430 ∼ 1.612 g·cm−3 have the minimum reflection loss (RLmin) of −59.96 dB at 2.90 mm and effective absorption bandwidth (EAB) of 4.20 GHz (8.2–12.4 GHz) at the thickness of 2.69–3.15 mm, covering the whole X-band EM wave. Moreover, the simulated reflection loss (RL) results of the GS metamaterials are consistent with the experimental values at different thickness. This strategy realizes the integration of simulation, modeling, experiment of EM absorbing metamaterials, and provides a new idea for the development of ceramic-based high temperature absorbing materials.