权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

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一种多组分化合物，它们是电子学中非常重要的功能材料和极限条件下的结构材料。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所必需的性质之一。然而，现有数据很少。本文设计并建造了一台Calvet型溶液量热计，用于测定各种复杂化合物的生成热。该热量计由一个热容量大、均匀温区宽的加热炉和一个带两个孔的铜等温夹套组成，和104个热电偶堆。在室温下检查热传递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热传递。热量计的热容量通过将Sn滴入液体Sn浴中时向内部加热器提供恒定的电功率来确定。为了检验量热计的准确性，在573K下，向液态锡浴中加入固体铅，测定了液态锡铅合金的混合热。所得结果与Kleppa报道的数据一致，并测定了In、Ga、InP和GaAs在750 K锡浴中的溶解热。通过将这些直接测量值与热力学数据相结合，评估了磷化铟和砷化镓的生成热，并与报道的数据进行了比较。除了GaAs外，其他都有很好的一致性。