Fiber medium-temperature longitudinal coefficient-of-linear-expansion testing device
A technology of expansion coefficient and test device, applied in the direction of material thermal expansion coefficient, etc., can solve the problems of electromagnetic field influence of differential transformer, unsuitable longitudinal linear expansion coefficient test, poor benchmark stability, etc., and achieves good benchmark stability and easy temperature uniformity. Achieving, numerically stable effects
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[0023] figure 1 It is a schematic diagram of the device composition of the present invention. Among them, the furnace frame 1, the gas filling tube 2, the electric heating furnace 3, the thermocouple 4 and the temperature controller 9 are all existing devices, which can be filled with inert protective gas, the length of the uniform temperature zone of the electric heating furnace 3 is not less than 100mm, and the uniform temperature zone The internal temperature fluctuation range is less than 2°C, the temperature measurement and control range is from room temperature to 800°C, and the temperature control accuracy is better than ±1°C.
[0024] image 3It is a structural schematic diagram of the quartz differential sensor kit 5 of the present invention. Wherein, the quartz outer tube 11 and the quartz mandrel 20 are all made of high-purity quartz glass of the same material, and the content of micro-components is not more than 50 ppm. The quartz outer tube support sleeve 12 a...
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