Formation Mechanism and Synthesis of Apatite-Type Structure Ba2+xLa8−x(SiO4)6O2−δ期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Formation Mechanism and Synthesis of Apatite-Type Structure Ba_2+xLa_8−x(SiO₄)₆O_2−δ

Authors:	Hiroaki Takeda Masataka Ohgaki Takashi Kizuki Kazuaki Hashimoto Yoshitomo Toda Shigekazu Udagawa Kimihiro Yamashita

Affiliation:	Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Kanda-Surugadai 2-3-10, Chiyoda-ku, 101-0062, Tokyo, Japan;Department of Industrial Chemistry, Chiba Institute of Technology, Tsudanuma 2-17-1, Narashino, 275-0016, Chiba, Japan;Research Institute, Chiba Institute of Technology, Tsudanuma 2-17-1, Narashino, 275-0016, Chiba, Japan

Abstract:	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 Ba_{2+ x}La_{8− x}(SiO₄)₆O_2−δ crystals with x = 0–2 was attempted using a solid-state reaction.

Keywords:	formation sythesis apatite