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Progress in Preparation of Nano-silicaAbstract:The qualities and applications in plastics, rubber, fiber and coating of nano-silica are summarized. The new technologies such as sol-gel method, reversed microemulsion method, rotating packed bed and the characters of these methods are introduced. At last, the paper forecasts the application fields of nano-silica.

Key words:nano-silica; preparation; progress; application

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Conservation and Utilization of Mineral ResourcesÆðÖ¹Ò³Â룺20-23¹ú¼Ê±ê×¼¿¯ºÅ£ºISSN 1001-0076¹úÄÚͳһ¿¯ºÅ£ºCN 41-1122ÀûÓùè»ÒʯΪԭÁÏÖÆ±¸ÄÉÃ×¶þÑõ»¯¹è·ÛÌåÀä¹âÈÙ Ðì°Ø»ÔÐÂÓà¸ÖÌúÓÐÏÞÔðÈι«Ë¾,½­Î÷Ê¡ÐÂÓàÊÐ338001Õª¡¡Òª:ʹÓÃÁ½ÖÖÇ¿ËáΪ¸´ºÏËá¡¢PEGµÈΪ¸´ºÏ·ÖÉ¢¼Á£¬ÒÔ¹è»ÒʯΪԭÁÏ£¬ÓÃÈܽº-Äý½º·¨ÖƱ¸ÁËÄÉÃ×¶þÑõ»¯¹è·ÛÌ壻ͨ¹ý͸Éäµç¾µ£¨TEM£©¡¢Ó«¹â¹âÆ×¡¢XÉäÏßÑÜÉäÒÇ£¨XRD£©ºÍ¿×϶ÂʲⶨÒǵÈÊֶμì²âÁ˲úÆ·µÄÐÔÄÜ£¬²úÆ·¿ÅÁ£ÎªÇò×´£¬Æ½¾ùÁ£¾¶Îª25nm£¬SiO2º¬Á¿´óÓÚ99£¥£¬Ö÷·å¿×¾¶Îª18nm¡£¸Ã·½·¨¹¤Òµ»¯Éú²ú¶þÑõ»¯¹è·ÛÌåÓÐÃ÷ÏÔµÄÓŵ㡣[ÖøÕßÎÄÕª]

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Preparation of the Silica Nanometer Powders from WollastoniteAbstract:The silica nanometer powders are prepared from a wollastonite ore by sol -gel methods with hydrochloric and another acid as the mixed - acid and PEG etc. as the compounding dispersant. The performances of the product have been studied by TEM, the X - ray fluorescence spectrum, XRD and the porosity testing machine. The particle of products is spheroid, the diameter of particle is 25 nm on average, the content of SiO2 is more than 99% , and the main aperture is 18nm. This process of producing silica nanometer powders for industrialization has the obvious advantages.

Key words:mixed - acid ; compounding dispersant ; sol - gel ; nanometer powder ; silica ; wollastonite

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stober ·½·¨£¬¿ÉÒÔ²éÔÄÎÄÏ×T. Katsuhiko, H. Akira, H. Takashi, N. Seiichi, Macromolecules
1987, 20, 2035.

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