氯硅烷精馏提纯工艺点“石”成“金”

Core Viewpoint - The research team at Tianjin University has successfully developed a high-purity polysilicon from silicon elements in ore, which supports the extraction of high-purity quartz, a critical material for high-tech industries [1][2] Group 1: Research and Development - The Ministry of Natural Resources of China has officially classified high-purity quartz ore as the 174th legal mineral, with a purity of 99.995%, meaning only 5 impurities per 100,000 atoms [1] - The Tianjin University team has developed a chlorosilane distillation purification process that filters out impurities from the ore, resulting in high-purity polysilicon [1] - The innovative integrated reaction distillation technology condenses the traditional multi-step silane preparation process into a single reaction tower, significantly increasing China's silane production to over 90% of the global output [1] Group 2: Market Implications - The advancements are expected to enable China's semiconductor-grade high-purity quartz sand annual production capacity to exceed 50,000 tons, gradually achieving self-sufficiency in mid-to-low-end products [2] - The technology allows for the extraction of materials that previously required imports, thereby loosening the pricing power that foreign companies held [2] - The value of the discovered ore is emphasized not only by its underground reserves but also by the innovation and effort put into the laboratory processes [2]