A hot stage microscope incorporating a differential thermal analysis unit

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Abstract
The design and operation are described of a hot stage microscope which also functions as a micro-thermal analyser and as a microdifferential thermal analyser. Based upon the use of 2 opposed, viewable, thermocouple microfurnaces, the instrument provides a sensitive means of detecting the heat effects which accompany reactions which may occur when small quantities (< 1 mg) of materials are either rapidly quenched or are undergoing programmed temperature change. This instrument has been used at temperatures up to 1800[degree]C and with use of suitable thermocouples it is possible to achieve temperatures up to 2500[degree]C.