| 摘要 |
This invention relates to a thermal analysis cell which is capable of supplying meaningful data in a high vacuum and which is particularly useful for operations within a mass spectrometer or similar instrument which allows the heating of samples within the confinement of the mass spectrometer vacuum or adjacent to the ion source. The cell comprises a silver block to guarantee uniform heat throughout the cell. It is insulated against the push-through shaft by a section of boron nitride, which is an excellent thermal insulator, and by sapphire or alumina, for example. The silver cell is equipped with two equal temperature sensing wells containing sample and reference temperature sensing means. A third and usually smaller well, designed to contain the block temperature sensing means, is usually provided. The sample itself is loaded into a metal cup which is secured to its well, and which contacts the temperature sensing means. A similar cup, usually containing non-reactive material, is inserted in the reference well and contacts its temperature sensing means, usually a thermocouple. The cell assembly has a detachable temperature sensing head part.
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