Abstract By using PbS powder as raw materials, high-purity compact and machinable galena bulk was successfully prepared by sintering method under high pressure and temperature for the first time. The hot pressed sintering was performed at 0.9 GPa and 550 °C for 1 h. The as-prepared products were characterized by powder X-ray diffraction (XRD), Electron Probe Microanalysis (EPMA), Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES), Carbon and Sulfur Analyzer, and optical microscopy, respectively. XRD results show that the as-prepared samples have a cubic structure and were identified as galena without any impurity. Based on microscopic observations and element analyses, only galena was identified, and it is consistent with the results of XRD analysis. The density of galena bulk was measured and it is equal to the theoretical value. It is machinable and can be processed into fixed shape.

中文翻译：

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热压烧结制备高纯度方铅矿块体

摘要 以PbS粉体为原料，通过高温高压烧结法首次成功制备了高纯度致密可加工方铅矿块体。热压烧结在 0.9 GPa 和 550°C 下进行 1 小时。所制备的产品分别通过粉末 X 射线衍射 (XRD)、电子探针微量分析 (EPMA)、电感耦合等离子体原子发射光谱法 (ICP-AES)、碳硫分析仪和光学显微镜进行表征。XRD 结果表明，所制备的样品具有立方结构，被鉴定为方铅矿，没有任何杂质。根据显微观察和元素分析，仅鉴定出方铅矿，与XRD分析结果一致。测得方铅矿块体密度与理论值相等。