高精度钾热管铝凝固点炉研制及性能测试

热管作为等温炉衬可提高固定点炉温场均匀性。为提高铝凝固点复现水平,研制了1套高精度钾热管铝凝固点炉。介绍了钾热管和固定点炉的研制流程,并测试了钾热管固定点炉性能。测试结果表明:采用分段升温的方式,炉子升温曲线平缓,整个升温过程中没有明显过冲现象,可有效保护铝凝固点容器的使用寿命;钾热管铝凝固点炉垂直温场均匀性为6.6mK;利用该钾热管铝凝定点炉可以实现铝凝固点温坪的复现,温坪重复性为0.02mK。

Development and Performance Test of High Precision Potassium Heat Pipe Furnace for Aluminum Fixed Point

As isothermal furnace liners, heat pipes can be used to improve the temperature uniformity of the fixed point furnaces. In order to improve the reproducibility of the freezing point of aluminum, a potassium heat pipe fixed point furnace for aluminum freezing point was developed. The production processes of potassium heat pipe and fixed point furnace were introduced, and the performance of the potassium heat pipe furnace was tested. The results show that there was no obvious temperature overshoot during the heating process of furnace startup, which can effectively extend the service life of the aluminum fixed point cell. The vertical temperature uniformity was 6.6mK. The repeatability of aluminum freezing point realized by the furnace was 0.02mK.