Fabrication and dielectric properties of phase-pure Ba2Ti9O20 microwave resonators

被引：0
|
作者：
Lin, WY
Gerhardt, RA
Speyer, RF
Hackenberger, WS
Shrout, TR
机构：
来源：
SOLID-STATE CHEMISTRY OF INORGANIC MATERIALS | 1997年 / 453卷
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中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The thermal processing schedules necessary to form phase pure Ba2Ti9O20, with and without substitutional solid solution were investigated. Undoped compositions formed the compound most easily under rapid (500 degrees C/min) heating rates, where diffusional agglomeration of the TiO2 batch constituent was minimized. The compound formed most easily with minor (0.82%) substitutions of SnO2 and ZrO2 for TiO2. The solubility of Sn in Ba2Ti9O20 was higher than that of Zr. Extended heat treatment (16 vs. 6 h at 1390 degrees C) resulted in volitalization of grain boundary liquid phase, leading to a more porous and slightly degraded resonators. The effects of dopant concentrations and soak periods at 1390 degrees C on dielectric constants and temperature-dependent quality factors are reported.
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页码：501 / 506
页数：6
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