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随着地质年代学研究的深入和发展,对同位素年龄测试方法和技术的要求愈来愈高。目前国内氩稀释法实验室的超高真空提取系统的结构基本相似,主要由熔样、纯化和转移等部分组成。熔样方法主要有三种:1)电子轰击炉加热;2)高频感应加热;3)不同材料电阻炉加热。前两者虽具有加热温度高的特点,但设备价格较高、辅助设备体积较大,电子轰击炉结构又较复杂。因此,在没有相应设备条件的实验室仍然采用传统的电阻炉加热熔样。电阻炉的加热材料一般采用钼丝或钨丝,以及石英衬管。这种电阻炉结构简单,但寿命较短,更换频繁。
With the deepening and development of geochronology research, the requirements of isotope age testing methods and techniques are getting higher and higher. At present, the structure of the ultra-high vacuum extraction system in the argon dilution laboratory in the country is basically similar, and is mainly composed of melting, purification and transfer. Fused sample methods are mainly three kinds: 1) electronic bombardment furnace heating; 2) high frequency induction heating; 3) resistance heating furnace of different materials. Although the first two have the characteristics of high heating temperature, but the higher equipment prices, auxiliary equipment, larger, electronic bombardment furnace structure is more complicated. Therefore, in the absence of equipment, the laboratory still use traditional resistance furnace heating sample. Resistance furnace heating materials generally use molybdenum wire or tungsten wire, and quartz liner. This resistance furnace structure is simple, but life is short, frequent replacement.