电热法测固体比热容实验的改进  

Improvement on experiment of measuring the specific heat of solid by electric heating

作　　者：吕建伟[1] 鄢玉霞[2] 宦强[2] 马葭生[2] 

机构地区：[1]徐州师范大学物理系 [2]华东师范大学物理系

出　　处：《物理实验》2001年第9期10-12,共3页Physics Experimentation

摘　　要：探讨了电热法测固体的比热容实验装置的改进 ,并介绍用自补偿方式消除系统误差的方法 .用集成温度传感器 AD5 90测量温度 ,通过模拟电路调零和放大 ,其温度由数字毫伏表直接显示 .This paper explores the improvement on experimental device of measuring the specific heat of solid, and introduces the compensation method for system errors. The temperature is measured with an integrated temperature sensor AD590, amplified and zeroed through an analog circuit, displayed directly by a digital voltmeter. The former calorimeter is replaced with a stainless Dewar flask.

关 键 词：电热法 固体比热容 集成温度 传感器AD590 热散失 自补偿 实验改进 温度测量 

分 类 号：O551.1[理学—热学与物质分子运动论] O4－33[理学—物理]