Formation Mechanism and Synthesis of Apatite‐Type Structure Ba2+xLa8−x(SiO4)6O2−δ
Formation Mechanism and Synthesis of Apatite‐Type Structure Ba2+xLa8−x(SiO4)6O2−δ
复制标题
磷灰石型结构Ba2+xLa8−x(SiO4)6O2−δ的形成机制及合成
DOI：
10.1111/j.1151-2916.2000.tb01654.x
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发表时间：
2004
影响因子：
3.9
通讯作者：
K. Yamashita
中科院分区：
文献类型：
--
作者：
H. Takeda;M. Ohgaki;T. Kizuki;T. Kizuki;K. Hashimoto;Y. Toda;S. Udagawa;K. Yamashita
使用热重-差热分析（TG-DTA）和高温粉末X射线衍射（HT-XRD）方法阐明了Ba2La8（SiO4）6O2的形成过程。从 HT-XRD 数据中鉴定出的相变令人惊讶地对应于 TG-DTA 曲线中观察到的重量损失和/或吸热峰。组成为Ba2La8(SiO4)6O2的原料在1400℃下完全反应，仅生成磷灰石型化合物，没有第二相。此外，尝试使用固相反应合成x= 0-2的Ba2+xLa8−x(SiO4)6O2−δ晶体。
The formation process of Ba2La8(SiO4)6O2 was clarified using thermogravimetry–differential thermal analysis (TG-DTA) and a high-temperature powder X-ray diffraction (HT-XRD) method. Phase changes identified from the HT-XRD data surprisingly corresponded to the weight loss and/or endothermic peaks observed in the TG-DTA curves. Raw material with the composition Ba2La8(SiO4)6O2 was completely reacted at 1400°C and produced only an apatite-type compound without a secondary phase. Moreover, the synthesis of Ba2+xLa8−x(SiO4)6O2−δ crystals with x= 0–2 was attempted using a solid-state reaction.