A DIFFERENTIAL THERMAL-ANALYSIS (DTA) APPARATUS FOR THE INVESTIGATIONOF LIQUID-CRYSTALLINE COMPOUNDS AT HIGH-PRESSURES

Authors
REIN C DEMUS D
Citation
C. Rein et D. Demus, A DIFFERENTIAL THERMAL-ANALYSIS (DTA) APPARATUS FOR THE INVESTIGATIONOF LIQUID-CRYSTALLINE COMPOUNDS AT HIGH-PRESSURES, Thermochimica acta, 237(1), 1994, pp. 133-141
Citations number
12
Categorie Soggetti
Chemistry Analytical
Journal title
Thermochimica acta → ACNP
ISSN journal
00406031
Volume
237
Issue
1
Year of publication
1994
Pages
133 - 141
Database
ISI
SICI code
0040-6031(1994)237:1<133:ADT(AF>2.0.ZU;2-N
Abstract
A DTA apparatus is presented for the temperature range 300-600 K, and up to 1 GPa pressure. It was designed for the investigation of liquid crystals but can also be used for other substances. The heater is woun d directly on the DTA measuring head within the high-pressure gas cham ber. The sample is hermetically encapsulated in an upside-down small g lass bulb which is completely submerged in a metallic liquid. This new kind of sample encapsulation enables a completely hysteresis-free pre ssure transmission and an absolute protection of the substance from co ntamination by the pressure medium in a DTA measuring head.