江苏省东海县石英储量 3亿ｔ,居全国首位。近年来 ,全县投资 1 0亿元相继开发了“滤紫外线石英玻璃管”、“大口径透明石英玻璃管”、“低腐蚀隧道密度压电石英晶体”等一大批高科技产品 ,部分产品填补了国内空白。目前全县硅微粉生产基地生产超纯、超细硅微粉及碳化硅微粉系列 Donghai County, Jiangsu Province has 300 million tons of quartz reserves, ranking first in the country. In recent years, the county invested 10 billion yuan to develop a large number of high-tech products such as “ultraviolet filter quartz glass tube”, “large-diameter transparent quartz glass tube”, “low-corrosion tunnel density piezoelectric quartz crystal”, and some products were filled. Domestic blank. At present, the county’s silicon powder production base produces ultra-pure, ultra-fine silicon powder and silicon carbide powder series