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硅在1 400℃开始熔化,而Mg在1 100℃就开始气化,因此CaMgSi混合物不可能采用一般加热法制造。日本半技术科学大学机械系户高羲一等人采用球磨混合机械合金化方法将CaMgSi混合料微粒化到纳米尺寸,压结后通电烧结,此时首先熔化的Mg同周围的Ca、Si发生反应,形成金属间化合物CaMgSi,其功率因子在160℃时为0.42mW/(m·K)。通过调整元素比例,分别制成热电器件的阳极(n型)和阴极(p型)。为进一步提高热电性能,正进行深入研究工作。
Silicon begins to melt at 1 400 ° C and Mg starts to gasify at 1 100 ° C. Therefore, it is impossible to manufacture a CaMgSi mixture by a general heating method. Japan’s semi-technical University of Science and Technology, a high-Xinyi, who used a ball milling mechanical alloying method to CaMgSi mixture micronized nano-size, sintering after sintering, when the first melting of Mg with the surrounding Ca, Si react To form an intermetallic compound CaMgSi whose power factor is 0.42 mW / (m · K) at 160 ° C. By adjusting the element ratio, the anode (n-type) and the cathode (p-type) of the thermoelectric device are respectively fabricated. In order to further improve the thermoelectric properties, in-depth research work is being carried out.