On the preparation of asymmetric CaTi0.9Fe0.1O3−δ membranes by tape-casting and co-sintering process

2009 ◽  
Vol 326 (2) ◽  
pp. 310-315 ◽  
Author(s):  
M.-L. Fontaine ◽  
J.B. Smith ◽  
Y. Larring ◽  
R. Bredesen
Keyword(s):  
Tape Casting ◽  
Sintering Process

scholarly journals Metal-supported SOFC Fabricated by Tape Casting and Its Characterization: A Study of the Co-sintering Process

2021 ◽  
Vol 53 (5) ◽  
pp. 210511
Author(s):  
Zaka Ruhma ◽  
Keiji Yashiro ◽  
Itaru Oikawa ◽  
Hitoshi Takamura ◽  
‪Tatsuya Kawada
Keyword(s):  
Metal Layer ◽  
Tape Casting ◽  
Sintering Process ◽  
Half Cell ◽  
Pore Former ◽  
Metal Support ◽  
Sintered Layer

Metal-supported SOFC consists of metallic and ceramic multilayers. Since the cell has to be flat, interaction between the layers that results in a flat sintered layer needs to be studied. The method used here was changing the starting materials through several experiments. Here, we highlight the effects of pore former in metal slurry on the sintered half-cell multilayer of a 430L metallic support, an NiO-8YSZ anode, and an 8YSZ electrolyte. The results show that by changing the amount of pore former in the 430L metal slurry changed the sinterability of the metal layer. This change of the sinterability of the metal support affected the final warpage state of the cell. This study aid in explaining the sintering phenomena between layers of metal-supported SOFCs.

Sintering process for tape casting of piezoelectric ceramics

2019 ◽  
Vol 552 (1) ◽  
pp. 132-139
Author(s):  
P. Plianaek ◽  
W. Bureemat ◽  
M. Sittkankaew ◽  
M. Thammajinda ◽  
O. Hemadhulin ◽  
...  
Keyword(s):  
Tape Casting ◽  
Piezoelectric Ceramics ◽  
Sintering Process

scholarly journals Chemical Degradation of the La0.6Sr0.4Co0.2Fe0.8O3−δ/Ce0.8Sm0.2O2−δ Interface during Sintering and Cell Operation

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3674
Author(s):  
Mélanie François ◽  
Maria Paola Carpanese ◽  
Olivier Heintz ◽  
Victoire Lescure ◽  
Davide Clematis ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Perovskite Phase ◽  
Tape Casting ◽  
Chemical Degradation ◽  
Doped Ceria ◽  
Sintering Process ◽  
X Ray ◽  
Cell Testing ◽  
Complete Cell ◽  
Degradation Of Materials

A complete cell consisting of NiO-Ce0.8Sm0.2O3−δ//Ce0.8Sm0.2O3−δ//(La0.6Sr0.4)0.95Co0.2Fe0.8O3−δ elaborated by a co-tape casting and co-sintering process and tested in operating fuel cell conditions exhibited a strong degradation in performance over time. Study of the cathode–electrolyte interface after cell testing showed, on one hand, the diffusion of lanthanum from (La0.6Sr0.4)0.95Co0.2Fe0.8O3−δ into Sm-doped ceria leading to a La- and Sm-doped ceria phase. On the other hand, Ce and Sm diffused into the perovskite phase of the cathode. The grain boundaries appear to be the preferred pathways of the cation diffusion. Furthermore, a strontium enrichment was clearly observed both in the (La0.6Sr0.4)0.95Co0.2Fe0.8O3−δ layer and at the interface with electrolyte. X-ray photoelectron spectroscopy (XPS) indicates that this Sr-rich phase corresponded to SrCO3. These different phenomena led to a chemical degradation of materials and interfaces, explaining the decrease in electrochemical performance.

Co-Sintering of SDC / NiO-SDC Bi-Layers Prepared by Tape Casting

2007 ◽  
Vol 280-283 ◽  
pp. 779-784 ◽  
Author(s):  
Hai Bin Li ◽  
Chang Rong Xia ◽  
Xiao Hong Fan ◽  
Xi He ◽  
Xiaoliang Wei ◽  
...  
Keyword(s):  
Open Circuit Voltage ◽  
Tape Casting ◽  
Open Circuit ◽  
Solid Oxide ◽  
Sintering Process ◽  
Anode Substrate ◽  
Anode Support ◽  
And Control ◽  
Sintering Shrinkage ◽  
Full Densification

In the development of intermediate temperature solid oxide fuel cell (IT-SOFC), the anode supported thin electrolyte with higher conductivity than YSZ is an essential approach in recent years. In this work, we report our route that Ce0.8Sm0.2O1.9 (SDC) as electrolyte and porous NiO-SDC as anode substrate are prepared by a bi-layer tape casting and co-sintering process. The major effort was to adjust and control the shrinkage of the two material layers. It was found that only the specimens with less than 0.1% mismatching of the sintering shrinkage between two layers can result in the flat and crack free samples. In addition, high activity powders were the essential to obtain dense SDC electrolyte. Fuel cells with Sm0.5Sr0.5CoO3 as cathode were tested. The open circuit voltage (OCV) and the power density of the cells confirmed the full densification of the SDC electrolyte on the anode support.

Effect of Copper Micro-Scale Excess on the Dielectric Properties of CaCu3Ti4O12 Ceramics Prepared via Tape Casting

2014 ◽  
Vol 941-944 ◽  
pp. 517-520
Author(s):  
Wei Li ◽  
Zhao Xian Xiong ◽  
Hao Xue ◽  
Chun Xiao Song ◽  
Hong Qiu
Keyword(s):  
Dielectric Properties ◽  
Solid Phase ◽  
Tape Casting ◽  
Temperature Stability ◽  
Liquid Phase Sintering ◽  
Sintering Process ◽  
Micro Scale ◽  
Low Dielectric ◽  
High Dielectric ◽  
Effect Of Copper

CaCu(3+x)Ti4O12 (x = 0, 0.001, 0.002, 0.004 and 0.008) ceramics with variation in copper micro-scale excess were prepared via solid-state reaction, Aqueous technology of tape casting was applied to obtain thick films of, about 100 μm in thickness. Crystal phases of the samples were identified by XRD. SEM of samples revealed that copper micro-scale excess can accelerate some important solid phase reactions in the sintering process, most because of liquid phase sintering mechanism. EDX analysis indicated that copper micro-scale excess could compensate for a lack of copper in sintering process. The Cu3.004 sample exhibited the best dielectric properties with a very low dielectric loss (0.029), while retaining a very high dielectric constant (91,536), and the Cu3.002 and Cu3.004 samples exhibited a well frequency and temperature stability which was of significant industrial relevance. In this work, it was concluded that a certain amount of Cu micro-scale excess could improve dielectric properties, frequency stability and temperature stability of CCTO ceramics.

scholarly journals Preparation of gradient Ni-SDC anode by tape casting and co-sintering

2010 ◽  
Vol 42 (2) ◽  
pp. 153-159 ◽  
Author(s):  
X.B. Li ◽  
H.Y. Wang ◽  
H.X. Gu ◽  
J. Wang ◽  
W.J. Zhang ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Thermal Expansion ◽  
Thermal Expansion Coefficient ◽  
Open Porosity ◽  
Bending Strength ◽  
Sintering Temperature ◽  
Tape Casting ◽  
Sintering Process ◽  
Casting Method ◽  
Better Than

Gradient Ni-SDC anode and anode-supported SDC electrolyte were produced by tape casting method with laminating and co-sintering process. The best co-sintering temperature of gradient Ni-SDC anode and SDC electrolyte was 1300?C for 3 h. The open porosity of gradient Ni-SDC anode sintered at 1300oC was 36%, which offered sufficient open porosity of more than 30%. By adjusting the composition of Ni in gradient anode, the thermal expansion coefficient (TEC) of Ni-SDC anode could be adjusted close to that of SDC electrolyte, which improve the compatibility of anode and electrolyte. The bending strength of gradient Ni-SDC anode was 134 MPa. The electrical conductivity of gradient Ni-SDC anode was better than that of non-gradient Ni-SDC anode at 650 - 800?C.

Multilayered Ceramic Composites – A Review

2015 ◽  
Vol 820 ◽  
pp. 393-398 ◽  
Author(s):  
Flávia Dagostim Minatto ◽  
Pâmela Milak ◽  
Edivelton S. Gislon ◽  
Kétlin Coelho ◽  
Agenor de Noni Jr. ◽  
...  
Keyword(s):  
Tape Casting ◽  
Slip Casting ◽  
Crack Arrest ◽  
Ceramic Materials ◽  
Ceramic Composites ◽  
Crack Deflection ◽  
Sintering Process ◽  
General Aspects ◽  
Toughness Enhancement ◽  
Thermal Expansion Coefficient Mismatch

Fracture toughness enhancement of ceramic materials through multilayered ceramic composites has been developed since 1990. Toughening mechanisms are based mainly on delamination, deflection, bifurcation or crack arrest effect. Delamination and crack deflection occur by means of weak interfaces. Bifurcation (and deflection as well) and crack arrest effects are result of residual stresses arising from the thermal expansion coefficient mismatch or phase transformation on alternating layers. The main manufacturing methods of these composites are slip casting of two ceramic materials, and stacking and pressing of ceramic tapes obtained by tape casting or rolling technics, followed by suitable sintering process. This review aims to present general aspects of research performed around the theme so far. It is verified that occurs the enhancement of ceramic toughness and reliability with this technic, so it is possible to enlarge its range of application in engineering.

Effect of Sintering Process on Microstructures and Dielectric Properties of Nb-Doped BaTiO3-(Bi0.5Na0.5)TiO3 Ceramics for X9R MLCC Applications

2018 ◽  
Vol 281 ◽  
pp. 634-639
Author(s):  
Ling Ling Chen ◽  
Zheng Bo Shen ◽  
Qian Cheng Zhao ◽  
Zi Ming Cai ◽  
Xiao Hui Wang ◽  
...  
Keyword(s):  
Screen Printing ◽  
Room Temperature ◽  
Sintering Temperature ◽  
Tape Casting ◽  
Sintering Process ◽  
Ceramic Capacitor ◽  
Conventional Sintering ◽  
Electron Microscopes ◽  
Scanning Electron Microscopes ◽  
Sintering Method

Multilayer ceramic capacitor (MLCC) chips have been successfully prepared through tape-casting and screen-printing. Conventional sintering method and two-step sintering method with different sintering temperature and holding time are used to obtain the MLCC chips. The scanning electron microscopes show that MLCC chips sintered by two-step sintering at T1=1200°C and T2=1130°C for 3h have a highly dense dielectric layer. The temperature coefficient of capacitance (TCC) of the MLCC chip is less than ±15% from-60°C to 235 °C that satisfactorily meets the requirement of X9R. The average capacitance and the dielectric loss of the MLCC chip are 88nF and 1.8% at the room temperature, respectively.

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