公开(公告)号：US5806979A

公开(公告)日：1998-09-15

申请号：US753036

申请日：1996-11-19

申请人： Karl A. Gschneidner, Jr. ,  Vitalij K. Pecharsky ,  Jack O. Moorman

发明人： Karl A. Gschneidner, Jr. ,  Vitalij K. Pecharsky ,  Jack O. Moorman

IPC分类号： G01K17/00 ,  G01N25/00 ,  G01N25/20

CPC分类号： G01K17/00 ,  G01N25/005

摘要： Apparatus for measuring heat capacity of a sample where a series of measurements are taken in succession comprises a sample holder in which a sample to be measured is disposed, a temperature sensor and sample heater for providing a heat pulse thermally connected to the sample, and an adiabatic heat shield in which the sample holder is positioned and including an electrical heater. An electrical power supply device provides an electrical power output to the sample heater to generate a heat pulse. The electrical power from a power source to the heat shield heater is adjusted by a control device, if necessary, from one measurement to the next in response to a sample temperature-versus-time change determined before and after a previous heat pulse to provide a subsequent sample temperature-versus-time change that is substantially linear before and after the subsequent heat pulse. A temperature sensor is used and operable over a range of temperatures ranging from approximately 3K to 350K depending upon the refrigerant used. The sample optionally can be subjected to dc magnetic fields such as from 0 to 12 Tesla (0 to 120 kOe).

摘要翻译： 用于测量连续测量的样品的热容量的装置包括其中设置待测样品的样品保持器，用于提供与样品热连接的热脉冲的温度传感器和样品加热器， 绝热隔热罩，其中样品架定位并包括电加热器。 电力供应装置向样品加热器提供电力输出以产生加热脉冲。 响应于先前加热脉冲之前和之后确定的样品温度 - 时间变化，如果需要，通过控制装置从一个测量到另一个测量，从电源到隔热加热器的电功率被调整，从而提供一个 随后的样品温度 - 时间变化，在随后的加热脉冲之前和之后基本上是线性的。 根据所使用的制冷剂，温度传感器可在大约3K至350K的范围内使用和操作。 样品任选地可以经受直流磁场，例如0至12特斯拉（0至120kOe）。