COMPLEX CALORIMETER WITH AC-MODE AND RELAXATION-MODE OPERATION

被引：21

作者：

EMA, K

UEMATSU, T

SUGATA, A

YAO, H

机构：

[1] Department of Physics, Tokyo Institute of Technology, Meguro, Tokyo, 152

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1993年 / 32卷 / 04期

关键词：

CALORIMETER; AC METHOD; RELAXATION METHOD; LATENT HEAT; LIQUID CRYSTAL; MHPOBC;

D O I：

10.1143/JJAP.32.1846

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A complex calorimeter has been developed. This calorimeter, which can be operated both in the ac mode and the relaxation mode using the same sample cell and the same apparatus settings, uses only a small amount (30-50 mg) of sample. An application to measurements in the vicinity of the antiferroelectric phase transitions in the liquid crystal MHPOBC(4-(1-methylheptyloxycarbonyl)-phenyl 4'-octyloxybiphenyl-4-carboxylate) is demonstrated. It is shown that the present calorimeter, when operated in the relaxation mode, enables detection of the latent heat with a resolution of 0.002 J/g.

引用

页码：1846 / 1850

页数：5

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