过年的英语作文专利名称：PRODUCTION OF ALPHA-QUARTZ-CRISTOBALITE SILICA FOR POTTERY 发明人：ALBERT RICHARD SMITH
申请号：US3660123D
申请日：19700204
公开号：US3660123A作文我的愿望
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19720502
参观者英语
专利内容由知识产权出版社提供
摘要：There is described a process for the production of silica for u as pottery body from silica sand. A mixture of the silica sand and from 0.3 to 2 percent by weight of the mixture of a calcium compound, calculated as calcium oxide, is calcinated at a temperature of from 1,200 DEG to 1,550 DEG C. for 5 to 60 minutes.
申请人：BRITISH INDUSTRIAL SAND LTD.聊qq
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