论文部分内容阅读
由(Hg_(1-(?))Cd_x)_y(Te_(1-y))在不同温度下的蒸气分压,可以求得P～T～x的关系,从而指导长晶工艺和液相外延,提高晶体质量.因此,平衡蒸气分压的测定,在理论上和经济上均有重要意义.但是,人们不能用压力计来测量高温、高压下气体的压力,特别是有强烈腐蚀性的气体.压力计将被腐蚀而不能正常工作.再说,压力计也只能测量化合物蒸气压的总压力,而不能测量各组分的分压.因此,测量高温、高压下化合物或合金熔体蒸气分压只能用间接的方法,这给技术上带来一定困难.目前有高压迥流法、露点法及光谱吸收法等.文献[4]报道了单光路法测定CdTe熔体平衡蒸气分压.为了降低光源不稳
The relationship of P ~ T ~ x can be obtained from the vapor partial pressure of (Hg_ (1 - (?)) Cd_x) _y (Te_ (1-y)) at different temperatures to guide the growth process and the liquid phase epitaxy , So as to improve the crystal quality.Therefore, it is theoretically and economically important to measure the equilibrium partial pressure of steam, however, one can not use a manometer to measure the pressure of a gas under high temperature and pressure, especially a strong corrosive gas The pressure gauge will be corroded and will not work properly, the pressure gauge can only measure the total pressure of the compound vapor pressure, but can not measure the partial pressure of each component. Therefore, measuring the compounds under high temperature and pressure or alloy melt vapor fraction Pressure can only be used indirect method, which brings some technical difficulties.At present, there are high pressure reflux method, dew point method and spectral absorption method, etc. [4] reported a single optical method for the determination of CdTe melt equilibrium vapor partial pressure. In order to reduce the instability of the light source