Block and malleable arsenopyrite hot-pressure sintering: applied implications
Block and malleable arsenopyrite hot-pressure sintering: applied implications
复制标题
块状和可锻毒砂热压烧结:应用意义
DOI:
10.1016/j.jmrt.2020.06.038
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发表时间:
2020-07
期刊:
影响因子:
--
通讯作者:
Qingyou Liu
中科院分区:
文献类型:
--
作者:
Kaizheng;Heping Li;Shuai Wang;Luying Wang;Qingyou Liu
A hot-pressure technique was used to sinter block-shaped, malleable, and compact arsenopyrite, based on the purified natural material. The results show that 500 °C and 1.0 GPa are the optimum temperature and pressure conditions, while at temperatures below 500 °C the product would become powdery or present visible cracks. Electron probe analysis (EPMA), X-ray diffraction (XRD), and Raman tests confirmed the purity of the samples with a molecular formula of Fe1.00As1.02S1.03. The calculated density was 6.2185 ± 0.0132 g/cm3, close to the unit cell density of 6.2389 g/cm3. The sample can easily be machined in a circular truncated cone shape, and used as an autoclave stopper at 440 °C and above 40 MPa for 35 h. Sintering results provide a possibility for further research on the electrochemical corrosion of sulfide minerals at high temperature and pressure. The hot-pressure procedure developed here provides a reference and inspiration for sintering other similar samples in this field.
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