铝酸钇(YAl_2O_3)晶体用料——Y_2O_3中碳杂质的除去  

Removal of Carbon Impurities in Y_2O_3 Used as One of Materials for YAIO_3 Crystal Growth

作　　者：吕坚[1] 郭喜彬[1] 

机构地区：[1]中国科学院福建物质结构研究所

出　　处：《硅酸盐通报》1992年第2期31-35,共5页Bulletin of the Chinese Ceramic Society

摘　　要：用草酸钇静态热分解的Y_2O_3含有某些碳杂质.用它做为铝酸钇晶体生长的原料是不适宜的,因为在高温缺氧条件下,碳和Al_2O_3结合形成一种杂质碳化铝(Al_4C_3)引发晶体的气泡和光弥散颗粒(<1μm).用通过纯化空气流加热除碳法使Y_2O_3中碳含量从1800ppm减少到100～150ppm.用这种Y_2O_3和含有50～60ppm C的Al_2O_3制备的Nd:YAlO_3晶体熔料生长出无气泡和无光弥散区的长度在150mm以上的Nd:YAlO_3单晶.Some carbon impurities were contained in Y_2O_3 decomposed from yttrium oxalate by statie heating This kind of Y_2O_3 is not suitable for YAlO_3crytal growth. The combination of carbon and Al_2O_3forms a harmful impurity of aluminium carbide (Al_4C_3) at high temperature and for lack of O_2, which gives rise to bubbles and light-scattering particles during YAlO_3Crystal growth. The carbon impurities were removed by heating with purification air flowing, and as a result, the content of carbon in Y_2O_3 has been reduced from 1800ppm to 100～150ppm. Nd: YAlO_3 sigle crystals in length > 150mm with neither bubbles nor light-scattering particles have been grown from the raw materials prepared with Y_2O_3and Al_2O_3containing 50～60ppm C.

关 键 词：铝酸钇 晶体 氧化钇 碳 杂质 

分 类 号：TQ133.23[化学工程—无机化工]