聚合物前驱体法制备CTNA陶瓷及其性能  

Properties of CTNA ceramics prepared by polymeric precursor method

作　　者：张国清[1] 郑兴华[1] 俞建长[1] 汤德平[1] 褚夫同[1] 

机构地区：[1]福州大学材料科学与工程学院,福建福州350108

出　　处：《电子元件与材料》2008年第2期10-12,共3页Electronic Components And Materials

基　　金：福建省先进陶瓷技术重大专项资助项目(No.2005HZ02-3);福州大学人才基金资助项目(No.NXJY-0413);福建省青年科技人才创新基金资助项目(No.2005J012)

摘　　要：采用DSC-TGA、XRD和SEM对聚合物前驱体法制备的0.7CaTiO_3-0.3NdAlO_3(CTNA)陶瓷粉末进行了分析。结果表明:经550℃预烧后的粉末为无定形态;但是当预烧温度提高到600℃时,形成了钙钛矿结构的CTNA单相。这表明CTNA晶相是未经中间相而直接从无定形态的前驱体中结晶形成。与传统固相反应法相比,合成温度从1300℃大幅下降到600℃。经900℃预烧,1375℃烧结的样品,其εr为43.3,Q·f为34862GHz,τf为1.4×10–6℃^(–1)。0.7CaTiO3-0.3NdAlO3 （CTNA） ceramic powder was synthesized by the polymeric precursor method, which was characterized by DSC-TGA, XRD and SEM. The results indicate that the powder is amorphous phase after calcining at 550 ℃ for 3 h. However, single CTNA phase with perovskite structure is found in the powder when the calcining temperature is raised to 600 ℃. This show that CTNA phase is crystallized directly from an amorphous, without any intermediate phase formation. Compared with the solid-state reaction method, the synthesis temperature is sharply decreased from 1 300 ℃ to 600 ℃. The samples calcined at 900℃ and sintered at 1 375℃, its er, Q·f and τf are 43.3, 34 862 GHz and 1.4×10^-6 ℃^-1, respectively.

关 键 词：无机非金属材料 微波介质陶瓷 聚合物前驱体法 CTNA陶瓷 钙钛矿结构 

分 类 号：TM28[一般工业技术—材料科学与工程]