{"title":"冻干法合成莫来石","authors":"T.A. Wheat , E.M.H. Sallam , A.C.D. Chaklader","doi":"10.1016/0390-5519(79)90010-3","DOIUrl":null,"url":null,"abstract":"<div><p>A freeze-drying technique has been developed to synthesize fine-grained stoichiometric mullite (3Al<sub>2</sub>O<sub>3</sub> · 2SiO<sub>2</sub>) by doping a silica sol with an appropriate quantity of a one molar Al<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub> solution followed by spray freezing in liquid N<sub>2</sub> and freeze drying the mixture. The freeze-dried powder when calcined at 1400°C produced a single-phase stoichiometric mullite as determined by X-ray diffraction. The final product was very friable and could be easily broken down to a mean particle size of ∼7 μm (equivalent spherical diameter).</p></div>","PeriodicalId":100227,"journal":{"name":"Ceramurgia International","volume":"5 1","pages":"Pages 42-44"},"PeriodicalIF":0.0000,"publicationDate":"1979-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0390-5519(79)90010-3","citationCount":"12","resultStr":"{\"title\":\"Synthesis of mullite by a freeze-dry process\",\"authors\":\"T.A. Wheat , E.M.H. Sallam , A.C.D. Chaklader\",\"doi\":\"10.1016/0390-5519(79)90010-3\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>A freeze-drying technique has been developed to synthesize fine-grained stoichiometric mullite (3Al<sub>2</sub>O<sub>3</sub> · 2SiO<sub>2</sub>) by doping a silica sol with an appropriate quantity of a one molar Al<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub> solution followed by spray freezing in liquid N<sub>2</sub> and freeze drying the mixture. The freeze-dried powder when calcined at 1400°C produced a single-phase stoichiometric mullite as determined by X-ray diffraction. The final product was very friable and could be easily broken down to a mean particle size of ∼7 μm (equivalent spherical diameter).</p></div>\",\"PeriodicalId\":100227,\"journal\":{\"name\":\"Ceramurgia International\",\"volume\":\"5 1\",\"pages\":\"Pages 42-44\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1979-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0390-5519(79)90010-3\",\"citationCount\":\"12\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Ceramurgia International\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/0390551979900103\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ceramurgia International","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0390551979900103","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
A freeze-drying technique has been developed to synthesize fine-grained stoichiometric mullite (3Al2O3 · 2SiO2) by doping a silica sol with an appropriate quantity of a one molar Al2(SO4)3 solution followed by spray freezing in liquid N2 and freeze drying the mixture. The freeze-dried powder when calcined at 1400°C produced a single-phase stoichiometric mullite as determined by X-ray diffraction. The final product was very friable and could be easily broken down to a mean particle size of ∼7 μm (equivalent spherical diameter).
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