Heats of Formation of Complex Compounds (Compounds Semiconductor, New Ceramics)

复杂化合物的生成热（化合物半导体、新型陶瓷）

基本信息

批准号：
62550481
负责人：
IGUCHI Yasutaka
金额：
$ 1.28万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1987
资助国家：
日本
起止时间：
1987 至 1988
项目状态：
已结题

项目摘要

Compound semiconductors and new ceramics, which are very important functional materials for electronics and structural materials under ultimate conditions, are multicomponent compounds. Heats of formation are one of necessary properties for stability index, rational production and quality control of these complex compounds. However, few data are available. In this study, a solution calorimeter (Calvet type) was designed and constructed to determine the heats of formation of various kinds of complex compounds. The calorimeter consists of a furnace with large heat capacity and wide uniform temperature zone, a copper isothermal jacket with two holes for the calorimeter cells., and 104 thermocouple piles. Heat transfer and a program for caloric evaluation by the personal computer were checked at room temperature and then temperature distribution inside the calorimeter cell and heat transfer at higher temperature were measured. The heat capacity of the calorimeter was determined by supplying a constant electric power to the internal heater on dropping Sn into liquid Sn bath. In order to check the accuracy of the calorimeter, the heats of mixing of liquid Sn-Pb alloys were measured by adding solid Pb to liquid Sn bath at 573 K. Obtained results are in good agreement with the data reported by Kleppa.Heats of solution of In,Ga,InP and GaAs into Sn bath have been determined at 750 K. By combining these directly measured values with thermodynamic data, heats of formation of InP and GaAs have been evaluated and compared with the reported data. There are good agreements each other except for GaAs.

化合物半导体和新型陶瓷是极限条件下非常重要的电子和结构材料功能材料，属于多元化合物。生成热是这些复杂化合物的稳定性指标、合理生产和质量控制的必要性质之一。然而，可用的数据很少。在这项研究中，设计并建造了溶液量热计（Calvet 型）来测定各种复杂化合物的形成热。该量热器由大热容量、宽均匀温区的炉体、带两个量热器孔的铜质等温夹套和104个热电偶堆组成。在室温下检查传热和个人计算机的热量评估程序，然后测量热量计单元内的温度分布和更高温度下的传热。通过将锡滴入液态锡浴中，向内部加热器提供恒定的电力来测定热量计的热容量。为了检查量热计的准确性，通过在573 K的液态锡浴中添加固态Pb来测量液态Sn-Pb合金的混合热。所得结果与Kleppa报道的数据非常吻合。溶解热在 750 K 下测定了 Sn 浴中 In、Ga、InP 和 GaAs 的含量。通过将这些直接测量值与热力学数据相结合，评估了 InP 和 GaAs 的形成热，并与报道的结果进行了比较。数据。除GaAs外，彼此都有良好的协议。