共沉淀和低温燃烧法制备Sr_(0.9)Ce_(0.9)Y_(0.1)O_(3-δ)陶瓷粉及性能  

Synthesis and Properties of Sr_(0.9)Ce_(0.9)Y_(0.1)O_(3-δ) Ceramic Powders by the Coprecipitation and the Low Temperature Combustion

作　　者：孟波[1] 谭小耀[1] 孟秀霞[1] 

机构地区：[1]山东理工大学化工学院,淄博255049

出　　处：《硅酸盐通报》2007年第6期1129-1135,共7页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金资助(20676073);山东省自然基金资助(2003ZX09);山东理工大学基金资助(2005KJM02)

摘　　要：分别采用基于Pechini法的溶胶低温燃烧法和共沉淀法制备了Sr_(0.9)Ce_(0.9)Y_(0.1)O_(3-δ)(SCY)超细陶瓷粉。应用X射线衍射、扫描电镜、能量散射谱和激光粒度分析仪对陶瓷粉体的结构和组成进行了表征,并研究了两种方法制备的粉体的烧结性能。结果表明:用溶胶低温燃烧法制备的SCY粉体为近似球形、粒径小于50nm,粒度分布范围窄,在1250℃烧结致密;用共沉淀法制备的粉体具有钙钛矿结构,粒径小于0.25μm、粒度分布窄,在1300℃烧结致密。此外,SCY致密膜具有一定的透氢作用,850℃氢渗速率在2×10-3mL.cm-2.min-1左右。Uhrafine ceramic powders of Sr0.9Ce0.9V0.1O3-δ（SCY） were synthesized via the low temperature combustion process based on the Pechini method and the coprecipitation process, respectively. The resulting SCY powders were characterized using X-ray diffraction, scanning electron microscope, energy disperse spectrum and laser particle size analyzer, and the sintering property of powders prepared by two methods were also investigated. The results show that the powders obtained by the low-temperature combustion are near globular in nanometer scale of 50nm with a narrow size distribution, and can be sintered in air at 1250℃ for 6h into dense pellet samples; while the powders obtained by coprecipitation process are perovskite structure, uniform particles smaller 0. 25μm in diameter, also with a narrow size distribution, and can be sintered in air at 1300℃ for 6h into dense pellet samples. The SCY powders obtained by the low-combustion; In addition, SCY thin dense films exhibits some hydrogen properties,hydrogen permeation rates through SCY thin dense films at 850℃ are about 2×10^-3mL·cm^-2·min^-1.

关 键 词：固体电解质 Sr0.9Ce0.9V0.1O3-δ 陶瓷粉 透氢 

分 类 号：TQ174.758[化学工程—陶瓷工业]