Reinvestigation of phase relations around the oxyapatite phase in the Nd_2O_3-SiO_2 system

Yuji Masubuchi; Mikio Higuchi; Kohei Kodaira

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Reinvestigation of phase relations around the oxyapatite phase in the Nd_2O_3-SiO_2 system

机译：对Nd_2O_3-SiO_2系统中氧磷灰石相周围相关系的重新研究

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Phase relations around the oxyapatite phase in the Nd_2O_3-SiO_2 system have been investigated by means of a slow cooling floating zone (SCFZ) method and solid-state reactions. The results on SCFZ proved that the oxyapatite phase melts congruently at the composition of Nd_2O_3:SiO_2 = 7:9, corresponding to Nd_(9.33)(SiO_4)_6O_2. The 2:3 phase (Nd_8(SiO_4)_6), which had been believed to have an apatite structure and to melt congruently, does not exist and consists of a mixture of Nd_(9.33)(SiO_4)_6O_2 and Nd_2Si_2O_7 phases. The solid-state reaction revealed that a solid solution region of the oxyapatite phase is extremely narrow or does not exist below 1650℃.

机译：利用慢冷却浮区法和固相反应研究了Nd_2O_3-SiO_2体系中氧磷灰石相周围的相关系。在SCFZ上的结果证明，在Nd_2O_3：SiO_2 = 7：9的组成下，磷灰石相完全融化，相当于Nd_（9.33）（SiO_4）_6O_2。不存在被认为具有磷灰石结构并能完全熔融的2：3相（Nd_8（SiO_4）_6），它由Nd_（9.33）（SiO_4）_6O_2和Nd_2Si_2O_7相的混合物组成。固相反应表明，在1650℃以下，氧磷灰石相的固溶区极窄或不存在。

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来源
《Journal of Crystal Growth》 |2003年第2期|p.207-212|共6页
作者
Yuji Masubuchi; Mikio Higuchi; Kohei Kodaira;
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作者单位

Division of Materials Science and Engineering, Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, Japan;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
中图分类晶体学;
关键词
A1. phase diagrams; B1. rare earth compounds; B1. silicates;

机译：A1。相图;B1。稀土化合物;B1。硅酸盐;

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Reinvestigation of phase relations around the oxyapatite phase in the Nd_2O_3-SiO_2 system

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