Thermodynamic Study of Electronic Materials

1)高纯金属中氧的分析：利用氧传感器和泵的新型氧分析方法，测定了高纯金属锗、铋、锑中的氧含量。2)液态二元合金中氧的热力学性质：用改进的库仑滴定技术测定了Ni-S和Co-S熔体中氧的活度系数。3)含In或Ga的液态二元合金和二元合金的热力学研究：利用稳定的氧化锆固体电解液的电动势方法，测定了Ga-Sb-In、Ga-Sb-Bi、In-BiTi和In-PbSb合金中的铟或镓的活度。根据Gibbs-Duhern方程和改进的二元合金计算方法计算了其他非动力学性质。4)化合物半导体材料的热力学研究：Ga在整个组成范围内的Ga-InAs固溶体中的活度与贫砷相共存。5)β-Al_2O_3与液态Ag或Ga二元合金中Ag或GO活度的离子交换反应：通过Na-β-Al_2O_3在AgNO_3或Ga-GaCl2熔体中的Ton-交换反应制备了Ag~+或Ga~+-β-Al_2O_3固体电解质。测量了后续电池的电动势，并测定了液态Ga-Sb合金中Ga的活度。用Ag2+-β-Al_2O_3固体电解质对银铅合金进行了同样的实验，但由于固体电解质在电动势测量过程中破裂，无法得到可靠的数据。

1) Analysis of oxygen in high purity metals: By using new type oxygen analytical method employing oxygen sensor and pump, the oxygen contents in high purity Ge,Bi and Sb have been determined. The analytical values were highly consistent and reliable despite the fairly low oxygen concentration in the sample.2) Thermodynamical properties of oxygen in liquid binaly alloys: Activity coefficients of oxygen in Ni-S and Co-S melts were determined by using a modified coulometic titration technique. The activity coefficients of oxygen in both melts are rapidly increased with increasing the sulfir compositions.3) Thermodynamic study of liquid binary and temary alloys including In or Ga: By the EMF method using stabilized zirconia solid electrolyte, indium or gallium activities in Ga-Sb-In,Ga-Sb-Bi,In-Bi-TI and In-Pb-Sb temary alloys were determined. The other thennodynamic properties were calculated based on Gibbs-Duhern equation and modified calculation method for temary alloys from the data of each constituent binary alloys.4) Thermodynamic study of compound semiconducten materials: The activities of gallium in the whole composition range of GaAs-InAs solid solutions coexisting with arsenic poor temary liquid phases. Composition dependence of the activity can be explained qualitatively in terms of the phase relation based on the model calculation.5) Ion exchange reaction of beta-alumina and Ag or Go activity measurement in liquid Ag or Ga binary alloys: Ag^+ or Ga^+-beta-alumina solid electrolyte was prepared-by ton-exchange reaction of Na-beta-alumina in AgNO_3 or Ga- GaCl_2 melts. The EMF of following cell was measured and the activities of Ga in liquid Ga-Sb alloys were determined. The same experiments for Ag-Pb alloy by using Ag^+-beta-alumina solid electrolyte was tried, however the reliable data could not obtained because solid electrolyte was broken during EMF measurements.