MoSi 2 Base Heating Elements Produced with Cold Pressing Process
MoSi 2 Base Heating Elements Produced with Cold Pressing Process
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采用冷压工艺生产的 MoSi 2 基加热元件
DOI：
10.2497/jjspm.8.145
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发表时间：
1961
期刊：
影响因子：
--
通讯作者：
T. Kawaguchi
中科院分区：
文献类型：
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作者：
K. Tamura;T. Kawaguchi
为了得到以MoSi 2为主要成分的声热元件，首先对MoSi 2、SiO2和Al 2 O3混合粉末本身进行了振实密度、压缩性和压制性的测试，通过上述粉末测试，明确了粉末的压制条件，并对冷压试样进行了电性能和力学性能的测试，确定了在各种气体中的最佳烧结条件，结果如下：（1）振实密度为1.89g/cm ~ 3。(2)在无润滑的情况下，压制成功，其值为3.2kg/mm ~ 2。(3)最佳冷压压力为20 kg/mm ~ 2。(4)在1600-1650°C、真空、氩气和H2气氛下烧结的条件下，收缩率约为35- 39%。(5)在真空、氩气和氢气气氛下，最佳烧结温度为1600-1650°C。烧结试样的密度为4.1-4.3g/cm ~ 3。(6)在1600-1650°C温度范围内，不同气氛下烧结的样品，室温电阻值在2.35-2.96×10 ~（-4）Ω·cm之间，高于热压烧结样品的电阻值。(7)1400°C时的电阻值为1.08-1.20×10-3Ω-cm。(8)在800°C下的断裂模量为17.2-18.9kg/mm 2。
To get the sound heat element chiefly composed of MoSi 2, at first we tested tap density, compressibility and compactibility of mixed powder itself of MoSi 2, SiO2, and Al2O3.As the result of above powder tests, we could clear the compacting condition.Furthermore, we measured electrical and mechanical properties of the cold-pressed specimens to get the best sintering condition in various gases.Results were as follows :(1) The tap density was 1.89g/cm3.(2) The compactibility was proved successful without lubricant, its value being 3.2kg/mm2.(3) The optimum pressure of cold-pressing was 20kg/mm2.(4) Shrinkage percent was about 35-39%, with the sintering condition, at 1600-1650°C, in vacuum, argon gas and H2 gas atmosphere.(5) In vacuum, Ar gas and H2 gas atmosphere, the optimum sintering temperature was 1600-1650°C. The density of the specimens sintered was 4.1-4.3g/cm3.(6) Electrical resistance values of specimens sintered at 1600-1650°C in various atmo-spheres were in the range of 2.35-2.96×10-4Ω-cm at room temperature.Its values were higher than that of the specimens prepared with hot pressing.(7) Electrical resistance values at 1400°C were 1.08-1.20×10-3Ω-cm.(8) Modulus of rupture at 800°C was 17.2-18.9kg/mm2.