| La_2O_3-TiO_2系陶瓷物相与介电性能研究 |
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| 引用本文： | 向勇,郝建民,张昊,谢道华,梅武刚. La_2O_3-TiO_2系陶瓷物相与介电性能研究[J]. 硅酸盐通报, 2001, 0(2) |
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| 作者姓名： | 向勇 郝建民 张昊 谢道华 梅武刚 |
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| 作者单位： | 天津大学电信学院!天津300072(向勇，张昊，谢道华，梅武刚)，信息产业部电子第46所!天津300192(郝建民) |
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| 摘 要： | 固相法合成La2 O3 TiO3 系陶瓷介质材料 ,XRD、SEM、EDS分析其结构、形貌和成分。高精度电容测量仪测试其介电性能。La2 O3/TiO2 比 1∶2、2∶9组分可获得极低介质损耗 ,XRD分析主晶相为La2 Ti2 O7和La4 Ti9O2 4 。La2 O3/TiO2 比 1∶3组分可获得La2 / 3TiO3、La4 Ti9O2 4 复相。缺陷型钙钛矿相La2 / 3TiO3不利于介质损耗降低。EDS分析表明晶界富集Si杂质 ,有效促进了液相烧结
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| 关 键 词： | 钛酸镧 低损耗 陶瓷介质 |
Study on La_2O_3-TiO_2 Ceramic Phase and Dielectric Behavior |
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| Xiang Yong Hao Jianmin Zhang Hao Xie Daohua Mei Wugang. Study on La_2O_3-TiO_2 Ceramic Phase and Dielectric Behavior[J]. Bulletin of the Chinese Ceramic Society, 2001, 0(2) |
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| Authors: | Xiang Yong Hao Jianmin Zhang Hao Xie Daohua Mei Wugang |
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| Affiliation: | Xiang Yong 1 Hao Jianmin 2 Zhang Hao 1 Xie Daohua 1 Mei Wugang 1 |
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| Abstract: | La 2O 3 TiO 2 system ceramic dielectric materials was synthesized by solid phase reaction Its phase structure,morphology and chemical composition were investigated by XRD,SEM,EDS Dielectric behavior was measured with high accuracy meter It is found that when the ratio of La 2O 3 to TiO 2 is 1 to 2 and 2 to 9,very low dielectric loss tangent can be obtained,and the main phase is La 2Ti 2O 7 and La 4Ti 9O 24 .The complex phases of La 2/3 TiO 3 and La 4Ti 9O 24 can be obtained when the ratio is 1 to 3. La 2/3 TiO 3 with the perovskite structure defect increases the dielectric losses.The Si impurity deposited in the grain boundaries is good for liquid phase sintering. |
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| Keywords: | lanthanum titanium low dissipation ceramic dielectric |
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