The high temperature vacuum tantalum wire heating furnace for the experiment comprises an outer shell, a base and a heating device arranged inside the outer shell, and the outer shell and the base are sealed; The heating device is composed of high temperature heating element, thermocouple, insulation package and top baffle, thermocouple is arranged in the heating device center position and vertically inserted in the base; High temperature heating elements by tantalum, corundum tube, just the jade ring gasket and two root tantalum material terminal, including corundum tube evenly distributed around the thermocouple, tantalum wire spiral around on all alundum tube, respectively, and both ends fixed on the two terminal tantalum material, separated with just the jade ring gasket between adjacent tantalum silk circles, each of the two terminal tantalum material through the base, Can be connected with external power supply when in use; The outside of the corundum tube is provided with a thermal insulation package. The heating furnace is simple in structure, compact in size, fast in temperature rise, low in cost, easy in maintenance and long in cycle service life, which can meet the requirements of most heating and insulation experiments.
In the conventional furnace (FeCrAl wire), the heating temperature range and heating rate are limited. The maximum temperature can only reach about 1000°C, and the maximum linear heating rate can be maintained only 0.230C /S from room temperature to 1000°C. For higher heating temperature and faster heating speed, this furnace can not meet the requirements. The melting point of tantalum is as high as 2996°C, the coefficient of thermal expansion is very small, and the tantalum is very malleable and can be drawn into fine filaments, which is suitable for making heating elements in high temperature heating furnaces. The utility model provides a high-temperature vacuum tantalum wire heating furnace for experiment, which can improve the upper limit of heating temperature and linear heating rate.
The heating device consists of a high temperature heating element, a thermocouple, a thermal insulation package and a baffle plate at the top. The thermocouple is arranged in the center of the heating device and inserted vertically into the base. High temperature heating elements by tantalum, three or more than three root corundum tube, just the jade ring gasket and two root tantalum material terminal, including corundum tube evenly distributed around the thermocouple, and parallel to the thermocouple, tantalum wire spiral around on all alundum tube, respectively, and both ends fixed on the two terminal tantalum material, between adjacent tantalum silk thread circle separated with just the jade ring gasket, Two tantalum terminal posts are arranged on the outside of the corundum tube and pass through the base respectively, which can be connected with the external power supply when in use. The thermal insulation package is arranged on the outside of the corundum tube to keep the temperature in the furnace.
