Block and malleable arsenopyrite hot-pressure sintering: applied implications

Block and malleable arsenopyrite hot-pressure sintering: applied implications
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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:
Journal of Materials Research and Technology
影响因子:
--
通讯作者:
Qingyou Liu
Qingyou Liu
中科院分区:
其他
文献类型:
--
作者:
Kaizheng;Heping Li;Shuai Wang;Luying Wang;Qingyou Liu

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采用热压烧结技术,以提纯的天然原料为原料,烧结出块状、韧性好、致密的毒砂。结果表明,500 °C和1.0 GPa是最佳的温度和压力条件,而在低于500 °C的温度下,产品会变成粉末或出现可见的裂纹。电子探针分析(EPMA)、X射线衍射(XRD)和拉曼测试证实了具有分子式Fe1.00As1.02S1.03的样品的纯度。计算的密度为6.2185 ± 0.0132 g/cm 3,接近于6.2389 g/cm 3的晶胞密度。该样品可以很容易地加工成圆形截锥形状,并在440 °C和40 MPa以上的条件下用作高压釜塞35 h。烧结结果为进一步研究高温高压下硫化矿物的电化学腐蚀提供了可能。该热压烧结工艺为同类材料的烧结提供了参考和启示。
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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