| BaO－TiO_2系中Ba_2Ti_9O_（20）相形成的研究 |
| |
| 引用本文： | 韩家平,张绪礼,王筱珍,智宇,陈昂.BaO－TiO_2系中Ba_2Ti_9O_（20）相形成的研究[J].硅酸盐学报,1996(2). |
| |
| 作者姓名： | 韩家平 张绪礼 王筱珍 智宇 陈昂 |
| |
| 作者单位： | 浙江大学材料科学与工程系，华中理工大学固体电子系，浙江大学材料科学与工程系，浙江大学物理系 |
| |
| 摘 要： | 研究了ＢａＯ－ＴｉＯ_２系中Ｂａ_２Ｔｉ_９Ｏ_（２０）相的形成规律。结果表明：ＢａＯ－ＴｉＯ_２系中，不加任何添加剂可以合成Ｂａ_２Ｔｉ_９Ｏ_（２０）相；在ＢａＯ－ＴｉＯ_２系中Ｂａ：Ｔｉ＝２：９附近存在一个很窄的单相Ｂａ_２Ｔｉ_９Ｏ_（２０）区；烧结阶段Ｂａ_２Ｔｉ_９Ｏ_（２０）相的最终合成并不依赖于预烧阶段部分此相的形成；通氧烧结对Ｂａ_２Ｔｉ_９Ｏ_（２０）相的形成影响不大，但可以抑制钛的变价。实验还发现，Ｂａ_２Ｔｉ_９Ｏ_（２０）陶瓷化学计量比的偏离将导致微波下介电常数的下降。
|
| 关 键 词： | 微波介质陶瓷，固相反应，微波介电特性 |
STUDY ON THE FORMATION OF Ba_2Ti_9O_(20) PHASE IN BaO-TiO_2 SYSTEM |
| |
| Han Jiqping.STUDY ON THE FORMATION OF Ba_2Ti_9O_(20) PHASE IN BaO-TiO_2 SYSTEM[J].Journal of The Chinese Ceramic Society,1996(2). |
| |
| Authors: | Han Jiqping |
| |
| Abstract: | The formation of Ba_2Ti_9O_(20) phase in BaO-TiO_2 system is discussed in the paper. The results show that Ba_2Ti_9O_(20) phase can be formed without any additives in the BaO-TiO_2 system. In BaO-TiO_2 system, around the ratio Ba:Ti=2:9, there exists a very small composition region forming Ba_2Ti_9O_(20). The formation of Ba_2Ti_9O_(20) phase in the sintering process doesn't depend on the formation of Ba_2Ti_9O_(20) phase in the pre-sintering process. The oxygen atmosphere in the sintering process doesn't affect the formation of Ba_2Ti_9O_(20) phase, but it restrains the change of Ti4+valence, In addition, the deviatiOn from stoichiometry for Ba_2Ti_9O_(20) ceramics decreases the dielectric constant at microwave frequencies. . |
| |
| Keywords: | s: microwave dielectric ceramics solid-state reaction microwave dielectric characterization |
| 本文献已被 CNKI 等数据库收录！ |
