Final Sintering Temperature Research Articles

Changing the Ca2+ ion ratio to modulate the temperature coefficient of resistivity (TCR) of La1-xCaxMnO3 films prepared by the sol-gel spin coating method

Perovskite manganese oxides are highly desirable for infrared acquisition owing to their characteristics of ferromagnetic metal-paramagnetic insulators. In this work, the sol-gel spin-coating technique was employed to prepare La1-xCaxMnO3 (LCMO) films with varying Ca2+ content (x = 0.1, 0.2, 0.3, 0.4, 0.5) on the (l00) LaAlO3 (LAO) substrates. In comparison to previous studies, the pre-sintering temperature, final sintering temperature, and final sintering period were modified. The crystal structure, surface topography, elemental valence states, and electrical transport performance of the LCMO films were characterized and analyzed as well. The results demonstrated that the diffraction peaks of the above films were aligned with those of the LAO single-crystal substrate. The change in Ca2+ content caused an increase in the Mn–O bond length, the amount of Mn4+, and the Mn–O–Mn angle in LCMO films, promoting the double exchange effect. These modifications had a considerable impact on the resistivity of LCMO films, increasing their TCR value. The maximum TCR of 22.92% K−1 was reached at x = 0.3 and peak TCR temperature (Tk) of 241.93 K. Therefore, the film has great application potential for infrared bolometers.

Preparation and properties of ternary rare earth co-stabilized zirconia ceramics for dental restorations

High fracture toughness and excellent hydrothermal aging resistance are the characteristics required for dental ceramic materials, but the widely used dental ceramic currently (3Y-TZP) does not exhibit. Aiming to solve this problem, a ternary rare earth co-stable zirconia ceramic (1.5Y5.5Ce0.3La-ZrO2) was prepared by a coating method based on a co-doping strategy. The sintering process, densification evolution, mechanical properties, resistance to hydrothermal aging and biocompatibility of 1.5Y5.5Ce0.3La-ZrO2 ceramic were studied. The results show that 1200 °C is the best pre-sintering temperature, and the machinability and controllability of shrinkage can meet the needs. When the final sintering temperature is 1600 °C, it has the best performance. Compared with 3Y-TZP, the bending strength is about 8.7% higher (912.48 MPa), and the fracture toughness is about 76.6% higher (10.49 MPa m1/2). Furthermore, its resistance to hydrothermal aging is significantly enhanced, greatly extending the service life of the material. The biosafety of 1.5Y5.5Ce0.3La-ZrO2 ceramics was evaluated, and the results showed that the material had no cytotoxicity. To sum up, 1.5Y5.5Ce0.3La-ZrO2 ceramics is a promising dental biomaterial, which has a broad application prospect in oral restoration.

Preparation and characterization of all-particle SiC ceramic filters

All-particle porous SiC ceramic filters were prepared by injection moulding and pressureless sintering methods. All-particle porous SiC ceramic filters were successfully prepared by using 1 mm SiC large particles as the main raw material and alcohol solutions of Al2TiO5, MgO, CeO2 and Polyvinyl Butyral (PVB) as slurry. Highly pure Al2TiO5 was successfully prepared at 1600 °C and a holding time of 2 h. The effect of the PVB content of the paste on the morphology and properties of the samples after demoulding was investigated. The effects of sintering temperature, holding time, MgO content, and CeO2 content on the mechanical properties of all-particle porous SiC ceramic filters were discussed. It was finally determined that 69 wt% of Al2TiO5, 6 wt% of MgO, 3 wt% of CeO2, and 2 wt% of PVB was the best performance of the samples. The experimental results show that the final sintering temperature for all-particle porous SiC ceramic filters was 1400 °C and the holding time was 20 min. At this time, the flexural strength, apparent porosity, and density of the sample were 6.6788 MPa, 42.1242 %, and 1.8319 g cm−3, respectively.

Machining pre-sintered compacts of a sinter-hardenable powder metallurgy steel: A novel methodology for selecting sintering temperatures for the optimum machinability

Machining of compacts sintered at a temperature below the final sintering temperature, i.e., pre-sintered compacts, is a promising avenue that deals with the issues in machining sinter-hardened compacts of a powder metallurgy (PM) steel, as well as their green counterparts, i.e., green machining. The present study analyses this avenue by performing a turning operation on the compacts prepared from a Rio-Tinto-produced FLC-4608 (Metal Powder Industries Federation denomination, standard 35) sinter-hardenable steel powder-premix pressed to nearly 7.00 g/cm3 density sintered at 600 °C, 800 °C, 1000 °C, and 1150 °C (the temperature in the conventional sinter-hardening cycle), using a cutting tool comprised of Seco-make DCGW 07 02 04 – AL insert and SDNCN 12 12 M 07 holder. It was found that at a fixed cutting velocity and feed rate, an increase in the sintering temperature affects the machinability as follows: on one hand, it increases Fc (cutting force component in the direction of cutting motion) and enhances difficulties in chip formation and handling; but on the other, it improves the surface finish of the machined surface and reduces the size of exit-edge-breakout (damage at the edge from where the cutting tool leaves the workpiece during machining). Given these opposing trends, a novel methodology was proposed to identify the range of appropriate sintering temperatures that enables the optimum machinability of pre-sintered compacts over both green machining and the machining of sinter-hardened counterparts. In this methodology, a newly defined machinability criterion, the ratio of machining outcome to machining effort, was graphically represented with the machining effort. Its significance in design for manufacturing (DFM) could be referred to from the current report. Nevertheless, based on the methodology, the 750 °C to 850 °C was identified as the range of appropriate sintering temperatures for the subject material-tool pair. Overall, this study is potentially helpful to the domain industries for improving the manufacturing process flow with due consideration of machining pre-sintered compacts.

The effect of LiF on preparation of transparent Eu:La2Zr2O7 ceramics by SPS

Pyrochlores are known for their sintering resistance, therefore, a novel approach for preparation of transparent Eu:La2Zr2O7 pyrochlore ceramics by spark plasma sintering (SPS) is demonstrated with LiF as a sintering additive. It is shown that LiF not only decreases the on-set temperature and final sintering temperature, but also effectively reduces porosity to achieve transparency. Moreover, since LiF acts only as a transition liquid phase, it does not alter the phase composition even after annealing.

Ceramic 3D printing using lithium silicate prepared by sol-gel method for customizing dental prosthesis with optimal translucency

In dentistry, various ceramics have been tested to overcome the opacity of zirconia. Moreover, three-dimensional (3D) printing technology is being used to accurately reproduce intricate shapes and overcome material wastage. This study described the application of a lithium silicate 3D printing material for the fabrication of transparent ceramic dental prostheses and the optimization of the process. After synthesizing approximately 500 nm of lithium silicate powder using the sol-gel method, field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), were performed and rheological properties were evaluated. Then, the sintering conditions were set based on thermogravimetry differential thermal analysis (TG-DTA). A slurry for 3D printing containing 40 vol% powder along with a photocurable resin, an acrylate binder, and a dispersant was prepared. A specimen measuring 15 mm in diameter and 1.8 mm in height, with a layer thickness of 50 μm, was printed with a digital light process (DLP) 3D printer using different holding times (1, 3, 5, and 10 h) and at a final sintering temperature of 1325 °C among the preceding sintering conditions. The shrinkage rate, Vickers hardness, and translucency of the finished specimens were compared and analyzed. Our study terrified the possibility of 3D printing of lithium silicate. Furthermore, our results suggest that a long sintering holding time has a positive effect on the specimen characteristics.

Study on the process and microstructure of Fe34Mn13.5Al3Cr7.5Ni alloy prepared by spark plasma sintering based on elemental powder

FeMnAlCrNi shape memory alloy exhibits constant superelasticity over a broad temperature range, which has application prospect in aerospace field. In this paper, Fe34Mn13.5Al3Cr7.5Ni superelastic alloy was prepared by spark plasma sintering, and the effects of pre-sintering and sintering process parameters, element diffusion process, and superelastic properties of the alloy were investigated. The orthogonal experiment was conducted to determine the optimal parameters and laws revealed that the compactness degree and hardness of this sintered alloy reached 99.7 % and 291HV, respectively, which were treated by a process of 620 ℃ and 15 min pre-sintering temperature and time, and final sintering temperature of 1000 ℃ under the sintering pressure 45 MPa. In FeMnAlCrNi alloy with multiple elements and significant differences in their melting points, Al element with low melting point will affect the diffusion and microstructure of alloy elements during sintering. The results show that Al element was in a liquid state during the sintering process, which helps to improve the density of the alloy. The remaining Al element in the alloy generated a small amount of pores due to the Kirkendall effect during heat treatment. After heat treatment, the superelastic recovery of the alloy was 0.46 % under 3 % compression.

Impact of Sintering Temperature Variation on Porous Structure of Mo2TiAlC2 Ceramics.

Mo, TiH2, Al and graphite elemental powders were used as starting materials for the activation reaction sintering process, which was employed to fabricate porous Mo2TiAlC2. The alteration of phase constitution, volume expansion, porosity, pore size and surface morphology of porous Mo2TiAlC2 with sintering temperatures ranging from 700 °C to 1500 °C were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and pore size tester. Both the pore formation mechanism and activation reaction process at each temperature stage were investigated. The experimental results illustrate that the sintered discs of porous Mo2TiAlC2 exhibit obvious volume expansion and pore structure change during the sintering process. Before 1300 °C, the volume expansion rate and porosity increase with the increment of temperature. However, with the sintering temperature above 1300 °C, the volume expansion rate and porosity decrease. At the final sintering temperature of 1500 °C, porous Mo2TiAlC2 with a volume expansion rate of 35.74%, overall porosity of 47.1%, and uniform pore structure was synthesized. The pore-forming mechanism of porous Mo2TiAlC2 is discussed, and the evolution of pressed pores, the removal of molding agents, the decomposition of TiH2, and the Kirkendall effect caused by different diffusion rates of elements in the diffusion reaction are all accountable for the formation of pores.

Effect of intrinsic vacancies on the electromagnetic properties of half-doped Sm0.5Ca0.5MnO3 manganites studied by positron annihilation

Mixed valence manganites are potential functional materials due to their unique electromagnetic properties. In this work, half-doped ceramics with the perovskite structure Sm0.5Ca0.5MnO3 polycrystalline samples are synthesized by the solid-state reaction method in open air at different final sintering temperatures. Structures and particle sizes are studied by x-ray diffraction and scanning electron microscopy, respectively. Positron annihilation spectroscopy and density-functional theory calculations are used to characterize the intrinsic vacancies in the bulk. Thereafter, the effect of vacancies on the magnetic and magnetoresistance (MR) properties is investigated. We find that Mn monovacancies (VMn) exist in the bulk among all the samples, and the concentration of VMn is different. We suggest a possible defect model that can be well applied to explain the phenomena of their electromagnetic properties. The transition temperature of the charge-order state (TCO) and ferromagnetic and anti-ferromagnetic (TN) are most likely related to the concentration of VMn and the particle sizes or pore sizes, respectively. The glass spin state transition temperature seems to be independent of the defect concentration and type. The metal conductive behavior does not appear in a high magnetic field and at low temperatures, which may be caused by the presence of a high concentration of VMn in the bulk and oxygen-related defects in the boundary, and the double exchange interaction is suppressed. At temperatures below TN and under a weak magnetic field, the MR is related to the total defect concentration. In addition, the high concentration of VMn is unfavorable for obtaining a high MR value.

Infiltration of silica slurry into silica-based ceramic cores prepared by selective laser sintering based on pre-sintering

The silica-based ceramic core is an important mold for manufacturing hollow blades. The preparation of silica-based ceramic cores by combining selective laser sintering (SLS) and vacuum infiltration (VI) technologies is a promising approach. To enhance infiltration effect, pre-sintering was introduced to obtain the bodies with high porosity and hydrophilicity. The infiltrated silica content increased from 29.58 wt% for samples infiltrated once to 68.91 wt% for samples infiltrated three times. The increase of silica content in the matrix reduced the porosity of final ceramics, thus improving the room-temperature flexural strength. The infiltrated silica gradually transformed into cristobalite during the high-temperature test, which improved the high-temperature flexural strength and creep resistance. When the final-sintering temperature was 1225 °C, room-temperature and high-temperature flexural strength reached 21.17 MPa and 21.21 MPa, respectively, due to the enhanced sintering necks and low porosity. These results indicate that our work provides a promising route to fabricate silica-based ceramic cores by SLS technology.

Effect of phase fraction and grain size on translucency of 3 mol% yttria-stabilized tetragonal zirconia polycrystal

The optical property of 3 mol% yttria-stabilized tetragonal zirconia polycrystal (3Y-TZP) is affected by various factors. This study aimed to evaluate the effects of phase fraction of zirconia polymorphs and grain size on the translucency of 3Y-TZP. Disk-shaped 3Y-TZP specimens were fabricated. Eight groups were established based on their final sintering temperature and holding time (1500°C-2h, 1550°C-2h, 1570°C-2h, 1570°C-5h, 1570°C-10 h, 1570°C-15 h, 1570°C-20 h, and 1600°C-2h). The sintered specimens were polished to a final thickness of 1.0 mm. The light transmittance was measured, crystalline phase was investigated, and grain size was calculated. In addition, the flexural strength, density, and tetragonality were measured. The translucency and grain size increased significantly, the tetragonal (t) phase fraction decreased, and the cubic (c) and tetragonal double-prime (t″) phase fractions increased as the sintering temperature increased. As the holding time increased, translucency was not significantly different among the groups; grain size significantly increased; t-phase fraction decreased; and the c- and t″-phase fractions increased. Strong positive correlations were observed among translucency, phase fraction, and grain size. Flexural strength was not significantly different among the groups; all groups showed an approximate full density, and their tetragonality increased as the sintering temperature and time increased. The translucency of 3Y-TZP is affected by the crystalline phase fraction and grain size. Increasing c- or t″-phase fractions and t-phase fractions above the critical level by suppressing other undesired phases with increased grain size would improve translucency without compromising the strength.

Influence of sintering parameters on the grain growth and mechanical properties of Ti(C,N)-based cermets prepared via mechanical activation and in-situ carbothermal reduction

Series of new type (Ti,Mo)(C,N)-based cermets sintered at different final sintering temperatures were prepared by the mechanical activation and in-situ carbothermal reduction method in vacuum. The grain growth behavior of the complete solid solution cermets was firstly studied by prolonging the holding time at 1400 °C by using XRD, SEM, and TEM. Results indicated that the thermodynamic three-dimensional equilibrium morphology of the hard-phase particles were {111}-faceted and round-edged octahedron, whose growth mechanism were predominated by the two-dimensional nucleation that controlled by the diffusion of the dissolved alloying elements in the binder along the close-packed direction. The microstructure and mechanical properties of the cermets were also studied. The results indicated that either too low or too high sintering temperature could deteriorate the homogeneity and porosity of the cermets. Only when the sintering temperature was 1400 °C, the optimum TRS, hardness, and fracture toughness of the cermets were 2134±30 MPa, 88.0±0.3 HRA, and 20.1±0.3 MPa·m 1/2 , respectively.

Effect of sintering time on the marginal and internal fit of monolithic zirconia crowns containing 3–4 mol% Y2O3

BackgroundShort-term sintering may offer advantages including saving time and energy but there is limited evidence on the effect that altering sintering time has on the accuracy of monolithic zirconia crowns. The purpose of this in vitro study was to investigate the effect of shortened sintering time on the marginal and internal fit of 3Y-TZP and 4Y-TZP monolithic crowns.MethodsSixty monolithic zirconia crowns were fabricated for the maxillary first molar tooth on the prefabricated implant abutment. Groups were created according to the material composition: 3Y-TZP Generation 1, 3Y-TZP Generation 2 and 4Y-TZP. Two different sintering protocols were performed: same final sintering temperature (1500 °C) and various rates of heating (10 °C/min and 40 °C/min), cooling down speed (− 10 °C/min and − 40 °C/min), holding time (45 and 120 minutes), and total sintering time (approximately 2 and 7 hours, respectively). The marginal and internal fit of the crowns were determined using the silicone replica technique. Comparisons between groups were analyzed using two-way ANOVA. Pairwise multiple comparisons were performed using t-test (p < 0.05).ResultsThe mean marginal gap values of 4Y-TZP zirconia revealed statistically significant increase for the short-term sintering protocol (p < 0.0001), while no difference was observed between the sintering protocols for the mean marginal gap values of 3Y-TZP groups. Although all groups showed clinically acceptable gap values, altering the sintering time had an effect on marginal fit of the crowns manufactured from 4Y-TZP zirconia.ConclusionsShortening the sintering time may lead to differences within clinically acceptable limits. The manufacturer’s recommendations according to material composition should be implemented with care.

Three-dimensional porous tungsten via DLP 3D printing from transparent ink

Tungsten, an essential refractory metal material, has the characteristics of high melting and boiling points, high hardness, low expansion coefficient, and low vapor pressure. An indirect strategy to print three-dimensional (3D) refractory metal materials via digital light processing (DLP) followed by a post-treatment process was proposed. To analyze this strategy, a transparent ink with tungsten salts was developed, printed into a 3D precursor via DLP, and subsequently transited into 3D porous tungsten. The ultraviolet rheological properties and stability of the ink, transition process from the precursor to a 3D article, and the properties of the obtained 3D porous tungsten were investigated. This ink was preferable for DLP 3D printing, possessing consistency, stability and favorable absorbance at the wavelength of 385 nm. With increasing temperature, the weight of the tungsten salt in the 3D precursor decreased by 8.97% and was transited to tungsten oxide below 460 °C, reduced to pure nano-sized tungsten at approximately 700 °C, and finally sintered into porous articles. The organics initially contributed to polymerization during printing as well as reduction as a carbon reducer after pyrolysis. The pore size distribution of porous tungsten is nonlinear or multimodal, depending on the final sintering temperature. At 1200 °C, two distinct peaks are observed in the pore distribution curves of the products. At 1400 °C, the small pore as a whole decreases from approximately 100–1000 nm. Correspondingly, the relative density of the samples increased with temperature.

Molecular Dynamics Study of Melting Behavior of Planar Stacked Ti–Al Core–Shell Nanoparticles

Selective laser sintering (SLS) is one of the most commonly used methods in additive manufacturing, due to its high prototyping speed and applicability to various materials. In the present work, molecular dynamics (MD) simulations were performed to study the thermodynamic behaviors of the planar stacked nanoparticles (NPs) model and explore the potential capability of the SLS process with nano-sized metal powders in the zero-gravity space environment. A multi-particle model of titanium–aluminum (Ti–Al) core–shell NP with a particle radius of 50 Å was constructed to investigate the characteristics of the melted pattern during sintering. Two patterns with different spatial densities were considered to study the influence of particle stacking on the melting process. Various core volume fractions and heating rates were examined to investigate their effects on the quality of the final sintered product. The stacked-NPs models with core volume fractions (CVFs) of 3%, 12%, and 30% were linearly heated up to 1100 K from room temperature (298 K) with heating rates of 0.04, 0.2, 0.5, and 1.0 K ps−1. The initial fusion temperature and final sintering temperature for each stacking pattern were obtained via the validation from the radial distribution function, mean squared displacement, and the radius of the gyration analysis. The 30% CVF yields the largest neck size before the melting point, while beyond the melting point, a larger core helps delay the formation of the fully-melted products. It is observed that using the close-packed stacked-NPs model under a slow heating rate (long melting duration) would help form a stable, completely sintered product with a relatively low final sintering temperature.

High Na+ conducting Na3Zr2Si2PO12/Na2Si2O5 composites as solid electrolytes for Na+ batteries

AbstractSodium superionic conductor Na3Zr2Si2PO12 (NZSP) is a promising material as a solid electrolyte for sodium‐ion batteries. The highest conductivity of ∼1.0 mS/cm at room temperature (RT) was reported for the compound with a Na content of approximately 3.3 per formula unit (f. u.) and when the material is synthesized with a final sintering temperature ≥1220°C. Herein, we propose a new synthesis method to enhance the conductivity of the NZSP by liquid‐phase sintering with the optimum amount of additive of amorphous‐Na2Si2O5. In this regard, a series of composite materials were prepared by mixing Na3Zr2Si2PO12 with amorphous‐Na2Si2O5 (NZSP/NS‐x wt.%; with x = 0.0, 2.5, 5.0, 7.5, 10.0) and sintering at a lower temperature of 1150°C. Enhanced conductivity of 1.7 mS/cm at RT has been achieved for the Na3Zr2Si2PO12/Na2Si2O5‐5.0 wt.% (NZSP/NS‐5.0) composite. The effects of additives on the NZSP phase formation, microstructure, and ion conductivity have been investigated by XRD, MAS NMR, SEM, and impedance spectroscopy. Our study demonstrates that the higher conductivity of the NZSP/NS‐5.0 composite is caused by the combined effect of increased Na content in the NZSP phase (by diffusion of Na+ ions from the liquid phase of NS to bare NZSP phase), higher density, and microstructures with lesser pores.

Facile synthesis and characterizations of Co2+ doped Bi0.8Ba0.2FeO3 nano-crystalline multiferroic ceramics

Barium doped BiFeO3 and Cobalt doped Bi0.8Ba0.2FeO3 (BBFO) nanocrystalline multiferroic ceramics were prepared by the sol-gel technique. Rhombohedral symmetry was observed throughout the compositions, and the effect of sintering temperature was observed on volume and grain size of BBFO at (400 °C–700 °C) using x-ray profiles. The final sintering temperature for Cobalt doped (BBFCO) was estimated by using thermal analysis. DC I-V (current-voltage) analysis was used to analyze the leakage current density and conduction mechanism of ceramics. The temperature-dependent electrical resistivity measurements confirmed the metallic behaviour of Co2+ doped BBFO multiferroics at low temperatures, and transition temperature TMI was also found to be Cobalt concentration-dependent. The dielectric response, electrical impedance, and Modulus of the material were measured in the frequency range 100Hz to 2MHz at room temperature. Trends or occurrences may be attributed to oxygen vacancies arise due to doping content.

Elaboration and characterization of low cost tubular ceramic supports made of Moroccan clay for microfiltration and ultrafiltration membranes

The target of this study is the preparation of ceramic supports with tubular configuration of a good quality. In this case, we used local clay from Meknes area as a basic material and solid waste from wood industry as an agent of porosity because they are cheap and available. Percentages of wood powder used in the preparation of clay pastes to extrude the supports are 0, 5 and 10 % (w/w). Consequently, analysis of findings shows that the elaborated supports are in a good sintering state and are chemically very resistant. Besides, porosity and mechanical resistance increase with the addition of wood powder. Moreover, values in permeation flux increases with both the function of the final sintering temperature and the percentage of the added wood powder.

Moderate temperature sintering of BaZr0.8Y0.2O3-δ protonic ceramics by A novel cold sintering pretreatment

The state-of-the-art protonic ceramic conductor BaZr0.8Y0.2O3-δ (BZY20) requires an extremely high sintering temperature (≥1700 °C) to achieve the desired relative density and microstructure necessary to function as a proton conducting electrolyte. In this work, we developed a cold sintering pretreatment assisted moderate-temperature sintering method for the fabrication of high-quality pure BZY20 pellets. BZY20 pellets with high relative density of ~94% were fabricated with a final sintering temperature of 1500 °C (200 °C lower than the traditional sintering temperature). A comparison with BZY20 control samples indicated that the proper amount of BaCO3 introduced on the BZY20 particle surface and the high green density achieved by cold sintering pretreatment were the main drivers for lowering the sintering temperature. The electrical conductivity measurement by electrochemical impedance spectroscopy showed that the as-prepared BZY20 pellets have a proton conductivity comparable to the state-of-the-art values. The cold sintering pretreatment outlined in this work has the potential to lower the sintering temperatures for similar types of protonic ceramic materials under consideration for a wide range of energy conversion and storage applications.

Effect of transition metal doping on the sintering and electrochemical properties of GDC buffer layer in SOFCs

AbstractA dense Ce0.9Gd0.1O2−d (GDC) interlayer is an essential component of the SOFCs to inhibit interfacial elemental diffusion between zirconia‐based electrolytes (eg YSZ) and cathodes. However, the characteristic high sintering temperature of GDC (&gt;1400°C) makes it challenging to fabricate an effective highly dense interlayer owing to the formation of more resistive (Zr,Ce)O2 interfacial solid solutions with YSZ at those temperatures. To fabricate a useful GDC interlayer, we studied the influence of transition metal (TM) (Co, Cu, Fe, Mn, &amp; Zn) doping on the sintering and electrochemical properties of GDC. Dilatometry data showed dramatic drops in the necking and final sintering temperatures for the TM‐doped GDCs, improving the densification of the GDC in the order of Fe &gt; Co &gt; Mn &gt; Cu &gt; Zn. However, the electrochemical impedance data showed that among various transition metal dopants, Mn doping resulted in the best electrochemical properties. Anode supported SOFCs with Mn‐doped, nano, and commercial‐micron GDC interlayers were compared with regard to their performance and stability levels. Although all of the SOFCs showed stable performance, the SOFC with the Mn‐doped GDC interlayer showed the highest power density of 1.14 W cm−2 at 750°C. Hence, Mn‐doped GDC is suggested for application as an effective diffusion barrier layer in SOFCs.