二氧化碲

性状描述: 白色四方或斜方结晶。加热变成黄色。溶 于氢氧化钠溶液和盐酸，几乎不溶于氨水，水中溶解度1:150000。相对密度5.75(四方)、6.04(斜方)。熔点733℃。沸点 1245℃。有毒。

质量标准: 99.999% metals basis:


外观Appearance                          White Powder or Crystalline Powder
X-射线衍射X-Ray Diffraction             Conforms to Structure
纯度Purity                              ≥99.999% Based on Trace Metals Impurities
Te Gravimetric Analysis                 77.5- 82.5 %
ICP Major Analysis                      Confirmed Confirms Te Component
痕量金属杂质total metallic impurities   ≤20ppm by ICP Atomic emission


99.99% metals basis:


外观Appearance                          White Powder or Crystalline Powder
X-射线衍射X-Ray Diffraction             Conforms to Structure
纯度Purity                              ≥99.99% Based on Trace Metals Impurities
ICP Major Analysis                      Confirms Hafnium component
痕量金属杂质total metallic impurities   ≤200ppm by ICP Atomic emission

储存条件: 密封保存。

用途: 制备亚碲酸盐。发射光谱分析。电子元件材料。防 腐剂。