发明名称 |
Differential calorimeter based on the heat leak principle |
摘要 |
A differential scanning calorimeter based on the heat leak principle having a reference measuring cell and a sample measuring cell symmetrically seated within a copper heat sink surrounded by an isothermal shield. Each measuring cell includes a cylindrical stainless steel ampoule which contains a test substance, a honeycombed aluminum cell frame which supports the ampoule, and a pair of thermopiles which are placed between the aluminum cell frame and the copper heat sink and which measure the temperature difference between the two. A plurality of resistive heating elements wired in series are applied to different sections of the heat sink and the isothermal shield, each heating element having a resistance respectively proportional to the heat capacity of the heat sink sections and the shield. A common current is then passed through the heating elements, thus producing a highly uniform positive temperature scan with a minimum of residual temperature gradients existing within the heat sink. The ampoules in the measuring cells are individually pressurizable whereby calorimetric data as a function of pressure can be obtained.
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申请公布号 |
US4255961(A) |
申请公布日期 |
1981.03.17 |
申请号 |
US19780952155 |
申请日期 |
1978.10.17 |
申请人 |
UNIVERSITY OF VA. ALUMNI PATENTS FOUNDATION |
发明人 |
BILTONEN, RODNEY L.;MOUNTCASTLE, DONALD B.;SUURKUUST, JAAK |
分类号 |
G01N25/48;(IPC1-7):G01K17/00 |
主分类号 |
G01N25/48 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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