Activity Measurements of Components at Dilution in Alloys by Isopiestic Cell-Atomic Absorption Spectrometry Combination

将等压池与原子吸收光谱仪相结合，测定了合金中各组分的活度。通过在不同温度下加热电池中的纯元素，在电池窗口温度固定的情况下，获得校准曲线，然后使用该曲线将对合金样品测量的吸光度换算为电池中的蒸汽压。用等温池测定了In-Sb(1100K)、Ga-Sb(1100K)、Sb-Pb(1130K)、PbAu(1130K)、BiPb833K、In-Pb1110K和GaPb1120K等组分的活度。会议结果公布如下：Yoon，Z.H.，Nakazawa，S.和Azakami，T.：“原子吸收光谱分析熔融合金的热力学研究(1)--熔融Ga-Pb和In-Pb合金中的组元活度--”，韩国金属学会秋季会议，1989-10.28.2。Yoon Z.H.，Nakazawa，S.和Azakami，T.：“原子吸收光谱分析在熔融合金中的热力学研究(2)--熔融的铋铅和锑铅合金中的组元活度--”，韩国金属学会秋季会议，1989.10.28.3。Yoon，Z.H.，Nakazawa，S.和Azakami，T.：“用原子吸收光谱测量Ga-Sb和In-Sb体系的活度”，日本金属学会春季会议，1990.4.4。为了使与背景吸收有关的修正被发明出来。该方法特别在低吸光度条件下是有效的。

An isopiestic cell was combined with an atomic absorption spectrophotometer to determine the activities of the components in alloys. By heating a pure element in the cell at different temperatures, whereas the cell window temperature being fixed, a calibration curve is obtained and then the curve is used to convert the absorbance measured for the alloy sample to the vapor pressure in the cell. The applicability of the isopiestic cell-atomic absorption spectrometer combination to vapor pressure measurements was examined by referring to the estimated mean free paths and the measured absorbances for pure element vapors as a function of temperature.An isothermal cell was used to determine the component activities for the system In-Sb(1100K), Ga-Sb(1100K), Sb-Pb(1130K), Pb-Au(1130K), Bi-Pb(833K), In-Pb(1110K), and Ga-Pb(1120K). The results were published at the meetings as follows:1. Yoon,Z.H., Nakazawa,S. and Azakami,T.: "Thermodynamic Study on Molten Alloys by Atomic Absorption Spectrometry(1)-Component Activities in Molten Ga-Pb and In-Pb Alloys-", Fall Meeting of Korean Institute of Metals, 1989.10.28.2. Yoon,Z.H., Nakazawa,S. and Azakami,T.: "Thermodynamic Study on Molten Alloys by Atomic Absorption Spectrometry(2)-Component Activities in Molten Bi-Pb and Sb-Pb Alloys- ", Fall Meeting of Korean Institute of Metals, 1989.10.28.3. Yoon,Z.H., Nakazawa,S. and Azakami,T.: "Activity Measurements for the Ga-Sb and In-Sb Systems by Atomic Absorption Spectrometry", Spring Meeting of Japan Institute of Metals, 1990.4.4.To make the correction concerned with back-ground absorption a new method was invented. The method is effective especially in a low-absorbance condition.