摘要
采用高温固相反应合成了A5B4O15型五层类钙钛矿结构新铌酸盐Ba3Nd2Ti2Nb2O15。Ba3Nd2Ti2Nb2O15晶体为三方晶系,空间群P3-ml(164),晶胞参数a=5.6532(1),c=11.6117(2),V=321.377(6)3,Z=1。Ba3Nd2Ti2Nb2O15陶瓷在微波频段具有较高的室温介电常数40.1,具有较高的Qf值19 606 GHz,接近于零的谐振频率温度系数+12×10-6K-1,因此,Ba3Nd2Ti2Nb2O15极有可能成为一种新型的介质微波陶瓷材料。
A new niobate Ba3Nd2Ti2Nb2O15 was synthesized by high temperature solid state reaction in the BaO-Nd2O3-TiO2-Nb2O5 system.The chemical compositions,crystal structure,microstructure,and microwave dielectric properties of the new compound were characterized.Ba3Nd2Ti2Nb2O15 crystallizes in trigonal system with space group P3-ml(164)and lattice constants a=5.653 2(1) ?,c=11.611 7(2) ?,V=321.377(6) ?3,Z=1.The Ba3Nd2Ti2Nb2O15 ceramic exhibits a high dielectric constant of 40.1,high quality factors(Q) 3 390(at 5.7...
出处
《武汉理工大学学报》
EI
CAS
CSCD
北大核心
2008年第1期28-31,共4页
Journal of Wuhan University of Technology
基金
国家自然科学基金(50572078,20571059)
关键词
铌酸盐
类钙钛矿结构
介电特性
new niobate
perovskite-like structure
dielectric properties
