Sintering behavior of anorthite-based composite ceramics produced from natural phosphate and kaolin

In this work, the energy-saving LTCC composite ceramics containing quartz, fused quartz and zirconia ceramic particles, respectively based on the binary system BaO-B2O3 were prepared by traditional solid-state preparation process at a sintering temperature of 900°C. Sintering mechanism and physical properties of the LTCC composite ceramics are investigated and discussed in detail in terms of their mineral phase composition. The results indicate that the introduction of α-alumina to the binary system BaO-B2O3 can improve the sintering behavior whereas the presence of the functional ceramic particles in the composite ceramics is important to achieve the peculiar physical characterlistics, which consequently supply more possibilities to regulate on the physical properties of the composite ceramics.

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Sintering Behavior and Phase Characterisation of Composite Perovskite/Fluorite Ceramics for Intermediate Temperature SOFCs and Oxygen Separation Membranes

MRS Proceedings ◽

10.1557/proc-0972-aa03-07 ◽

2006 ◽

Vol 972 ◽

Cited By ~ 1

Author(s):

Natee Tangtrakam ◽

Matthew Swanson ◽

Peter Moran ◽

Jakob Kuebler ◽

Jayanta Kapat ◽

...

Keyword(s):

Structural Changes ◽

Sintering Behavior ◽

Composite Ceramics ◽

Oxygen Separation ◽

Temperature Dependent ◽

Separation Membranes ◽

Fuel Cell Cathode ◽

Different Temperatures ◽

Sintering Mechanisms ◽

Powder Phase

AbstractThe sintering behavior and structural changes of fluorite Gd0.2Ce0.8O2-δ(GDC) with one of three perovskites: LaMnO3 (LMO), (La0.7Sr0.3)0.98MnO3 (LSM) and La0.6Sr0.4Fe0.8Co0.2O3 (LSFC) composite ceramics were studied. Sintering was carried out for two hours at five different temperatures: 1100°C, 1200°C, 1300°C, 1400°C, and 1500°C. The highest sinterability has been found in LSFC + GDC. LSM + GDC appear to undergo two-step sintering mechanisms. Of all types of ceramics, only sintered LMO experiences a phase change, from rhombohedral R C to orthorhombic Pnma structure, with respect to its powder phase at sintering temperatures ≥1200 °C. The transition is notably suppressed when LMO is part of an LMO + GDC composite. GDC in a fluorite and/perovskite composite, when sintered, undergoes a temperature-dependent expansion in its unit cell that is not observed in pure GDC ceramics. This structural change will impact the function of composite ceramics as a fuel cell cathode, or oxygen separation membranes.

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Sintering behavior of fluorapatite-based composites produced from natural phosphate and alumina

Ceramics International ◽

10.1016/j.ceramint.2020.09.202 ◽

2021 ◽

Vol 47 (3) ◽

pp. 3553-3564

Author(s):

S. Djouallah ◽

H. Belhouchet ◽

A. Kenzour ◽

D. Kherifi

Keyword(s):

Sintering Behavior ◽

Natural Phosphate

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Relationship between the Different Amount of LMZBS Glass and Dielectric Properties of Li2(Mg0.96Ni0.04)SiO4 Ceramics

Materials Science Forum ◽

10.4028/www.scientific.net/msf.1027.10 ◽

2021 ◽

Vol 1027 ◽

pp. 10-14

Author(s):

Rui Peng ◽

Yuan Xun Li ◽

Hua Su ◽

Yong Cheng Lu ◽

Xue Ying Wang ◽

...

Keyword(s):

Dielectric Properties ◽

Microwave Dielectric Properties ◽

Composite Ceramic ◽

Solid State Reaction Method ◽

Sintering Behavior ◽

Network Analyzer ◽

Composite Ceramics ◽

Dielectric Parameters ◽

Densification Temperature ◽

Microwave Dielectric

The effect of different amount of LMZBS glass on the sintering behavior, microstructure and microwave dielectric properties of the Li2(Mg0.96Ni0.04)SiO4 ceramics was investigated. The synthesis of materials was based on the solid-state reaction method. The micromorphology of the composite ceramics was confirmed using scanning electron microscopy. The microwave dielectric parameters were measured by the network analyzer. The mechanism of heat transfer coming from LMZBS glass lower the densification temperature of matrix ceramic from 1150°C down to 900°C. Excellent microwave dielectric properties were obtained with 1.2 wt% LMZBS glass sintered at 900°C for 4h (εr=5.77 and Q×f=29,558 GHz at 16 GHz, τf=-14.5 ppm/°C). There was a compatibility between the composite ceramic and Ag. Therefore, the aimed ceramic has great potential value of application in the field of low temperature co-fired ceramics of millimeter-wave devices.

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