V_2O_5助烧对纳米CLST陶瓷的显微结构与性能的影响  

Effects of V_2O_5 Doping on the Microstructure and Properties of Nano CLST Ceramics

作　　者：李谦[1] 黄永峰[1] 黄金亮[1] 龙永强[1] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471003

出　　处：《压电与声光》2008年第3期325-327,共3页Piezoelectrics & Acoustooptics

基　　金：河南省高校创新人才基金资助项目(2001-213);河南科技大学青年基金资助项目(2004QN023)

摘　　要：应用溶胶-凝胶(Sol-Gel)法与自燃烧结合的方法制备了CaO-Li2O-Sm2O3-TiO2(CLST)陶瓷纳米粉体。该文讨论了Sol-Gel法与自燃烧法结合制备CLST纳米粉体的新方法。对V2O5掺杂的低温烧结CLST陶瓷从烧结性质、结构与相组成、显微形貌、介电性质等方面进行了研究。结果表明,V2O5掺杂能显著降低CLST陶瓷的烧结温度,由1 300℃降至1 100℃。掺杂质量比为0.25%的V2O5的CLST陶瓷取得了较好的介电性能。介电常数rε=86,介电损耗tanδ=0.011,频率温度系数τf=10×10-6/℃。CaO-Li2O-Sm2O3-TiO2 （CLST）fine powders were prepared by auto combustion of Citrate-nitrate Gel method. In this paper, a new method to prepare CLST ceramics by auto-combustion of citrate nitrate Gel was studied and V2O5 doped low temperature sintered CLST ceramics was also investigated in the aspects of sintering properties, structure and phase composition, microstructure and dielectric properties. The experimental results indicated that V2O5 addition could decrease the sintering temperature from 1 300 ℃ to 1 100 ℃. The 0.25% V2O5 doped CLST ceramics sintered at 1 100 ℃ had the optimum dielectric properties： dielectric constant εr=86, dielectric loss tan δ= 0. 011 and temperature coefficient of resonant frequency τf= 10× 10^-6/℃.

关 键 词：溶胺-凝胶(Sol-Gel)法 CaO-Li2O-Sm2O3-TiO2(CLST) 自燃烧 低温烧结 

分 类 号：TH145[一般工业技术—材料科学与工程]