Sol–Gel Processing and Microwave Characteristics of Ba(Mg⅓Ta⅔)O3 Dielectrics
Sol–Gel Processing and Microwave Characteristics of Ba(Mg⅓Ta⅔)O3 Dielectrics
复制标题
Ba(Mg⅓Ta⅔)O3 电介质的溶胶-凝胶加工和微波特性
DOI：
--
复制
发表时间：
1992
期刊：
影响因子：
--
通讯作者：
M. Lejeune
中科院分区：
文献类型：
--
作者：
O. Renoult;J. Boilot;F. Chaput;R. Papiernik;L. Hubert;M. Lejeune
采用溶胶-凝胶法制备了纯Ba(Mg1/3Ta2/3)O3陶瓷。这涉及到异金属醇氧化物Ta2Mg(OEt)12与水合氢氧化钡Ba(OH) 2.8 h2o的反应。溶胶-凝胶衍生的粉末在600℃下完全结晶，形成立方钙钛矿型相。在1400℃（2-5 h）烧结后，Mg-Ta有序形成三角形晶胞（有序度大于0.9），获得理论密度的98.5%左右。初步的微波介电测量结果表明，在7.7 GHz频段，陶瓷的介电常数为24.2，卸载Qu为6750。
The sol–gel method has been developed for the preparation of pure Ba(Mg1/3Ta2/3)O3 ceramics. This involves the reaction of the heterometallic alkoxide Ta2Mg(OEt)12 with hydrated barium hydroxide Ba(OH)2·8H2O. Complete crystallization of the sol–gel-derived powder is achieved at 600°C, leading to a cubic perovskite type phase. After sintering at 1400°C (2–5 h), a trigonal cell arises from Mg–Ta ordering (the degree of order is greater than 0.9), and about 98.5% of the theoretical density is obtained. Preliminary microwave dielectric measurements show that the dielectric constant and the unloaded Qu of the ceramics are 24.2 and 6750, respectively, at 7.7 GHz.