Some observations on the use of strontium carbonate as a temperature standard for DTA

被引：28

作者：

Robbins, SA ^{[1
]}

Rupard, RG ^{[1
]}

Weddle, BJ ^{[1
]}

Maull, TR ^{[1
]}

Gallagher, PK ^{[1
]}

机构：

[1] OHIO STATE UNIV,DEPT MAT SCI & ENGN,COLUMBUS,OH 43210

来源：

THERMOCHIMICA ACTA | 1995年 / 269卷

关键词：

DTA; standard; strontium carbonate; temperature;

D O I：

10.1016/0040-6031(95)02602-9

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The simultaneous decomposition of strontium carbonate that occurs during the solid-to-solid phase transition is a detriment to the use of this material as a high temperature standard for DTA. An atmosphere of carbon dioxide is shown to deter the reversible decomposition to much higher temperatures where it is no longer a problem. The phase transition temperature was observed to shift during the initial heating through the transition in carbon dioxide but remain constant thereafter. Changes were also observed in the X-ray diffraction pattern during the initial heating. It is proposed that the use of this material as a DTA standard be restricted to an atmosphere of carbon dioxide using a sample that has undergone at least one temperature cycle in that atmosphere.

引用

页码：43 / 49

页数：7