Nonadiabatic scanning calorimeter

被引：127

作者：

Yao, H

Ema, K

Garland, CW

机构：

[1] Tokyo Inst Technol, Fac Sci, Dept Phys, Tokyo 152, Japan

[2] MIT, Dept Chem, Cambridge, MA 02139 USA

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 1998年 / 69卷 / 01期

关键词：

D O I：

10.1063/1.1148492

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A high-resolution computerized calorimeter capable of fully automatic operation in either ac or relaxation modes is described. Emphasis is given to a new version of the relaxation technique in which the heater power is ramped linearly in time. This improvement results in superior performance and convenience in studying both first-and second-order phase transitions and allows quantitative evaluation of latent heats as well as pretransitional heat capacity variations. Examples are given for the use of this calorimeter in the study of liquid crystal phase transitions. (C) 1998 American Institute of-Physics.

引用

页码：172 / 178

页数：7

共 19 条

[1] ADIABATIC CALORIMETRY MEASUREMENTS IN THE VICINITY OF THE NEMATIC-SMECTIC A-SMECTIC-C MULTICRITICAL POINT [J].