High-purity quartz serves as a crucial basic material for strategic emerging industries such as the new-generation information industry, new energy, and high-end equipment. The photovoltaic and semiconductor industries exhibit a robust demand for high-end high-purity quartz crucibles, and their quality requirements are becoming increasingly stringent. This paper conducts a comprehensive analysis of the industry requirements for high-purity quartz sand used in crucibles from multiple aspects, including purity, inclusions, particle size, and micro-morphology. Purity affects crucible thermal stability and optical properties; Inclusions reduce transparency and affect the thickness of transparent layer and bubble content; Good homogeneity is required in terms of particle size and morphology. On this basis, the characteristics of pegmatite-type and vein quartz-type high-purity quartz siliceous raw materials are overviewed. It is proposed that inclusions and lattice impurities are the key factors restricting the utilization of high-purity quartz crucibles. Moreover, the key technologies of high-purity quartz deep purification are systematically summarized, aiming to provide support for the optimization of high-purity quartz sand raw-material search and purification technologies.

中文翻译：

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坩埚用高纯石英原料的特点及关键净化技术探索

高纯石英是新一代信息产业、新能源、高端装备等战略性新兴产业的重要基础材料。光伏和半导体行业对高端高纯度石英坩埚的需求强劲，其质量要求也越来越严格。本文从纯度、夹杂物、粒度和微观形貌等多个方面对坩埚中使用的高纯石英砂的行业要求进行了全面分析。纯度会影响坩埚的热稳定性和光学性能;夹杂物会降低透明度并影响透明层的厚度和气泡含量;在粒度和形态方面需要良好的均匀性。在此基础上，概述了伟晶岩型和脉状石英型高纯石英硅质原料的特点。提出夹杂物和晶格杂质是制约高纯石英坩埚利用的关键因素。此外，系统总结了高纯石英深层净化的关键技术，旨在为高纯石英砂原料搜索和净化技术的优化提供支撑。