RE (RE=Y, Gd, Nd and La)-Mg-Si-O-N系融体中への窒化ケイ素の溶解度および同系ガラスの硬度
RE (RE=Y, Gd, Nd and La)-Mg-Si-O-N系融体中への窒化ケイ素の溶解度および同系ガラスの硬度
复制标题
氮化硅在RE（RE=Y、Gd、Nd和La）-Mg-Si-O-N体系熔体中的溶解度及类似玻璃的硬度
DOI：
10.2320/jinstmet.68.519
复制
发表时间：
2004
影响因子：
--
通讯作者：
Kunihiko Nakashima
中科院分区：
文献类型：
--
作者：
Noritaka Saito;Shinichi Shiota;Ayumu Umemoto;Kunihiko Nakashima
本文系统地研究了α-氮化硅在RE_2 O_3（RE=Y，Gd，Nd和La）-MgO-SiO_2熔体中的溶解度。研究了氮含量对RE-Mg-Si-O-N氮氧化物玻璃维氏硬度的影响，在1773 K保温6 h左右，α-Si_2N在熔体中的溶解反应达到平衡。饱和氮的含量为4.8 ~ 5.8原子%，取决于添加稀土元素的离子半径。随着氮含量的增加，玻璃的维氏硬度逐渐增大。氧氮化物玻璃的X射线光电子能谱分析结果表明，玻璃中存在Si N键。这些结果表明，氮取代氧可能导致交联的增加，产生更刚性的玻璃网络。
The solubility of α-silicon nitride into RE2O3 (RE=Y, Gd, Nd and La)-MgO-SiO2 melts have been examined systematically. The effect of nitrogen content on the Vickers hardness of RE-Mg-Si-O-N oxynitride glasses have been examined.The dissolution reaction of α-silicon nitride into melts have achieved equilibrium about 6 h holding at 1773 K. The content of saturated nitrogen was 4.8∼5.8 at%, depending on the ionic radius of adding rare-earth elements. A marked change was observed in the order of ionic radius from La to Y.The Vickers hardness of RE-Mg-Si-O-N oxynitride glasses increased with increasing the content of nitrogen. The results from X-ray photo-electron spectroscopy of oxynitride glasses revealed the existence of Si≡N bonds. These results suggest that the substitution of nitrogen for oxygen may lead to the increase of cross-linking produces a more rigid glass network.