{"title":"钛酸盐添加量对Al2O3烧结温度的影响","authors":"G. Wroblewska","doi":"10.1016/0390-5519(79)90017-6","DOIUrl":null,"url":null,"abstract":"<div><p>The effect of small additions of magnesium titanate, calcium titanate, strontium titanate, and barium titanate on the sintering temperature of aluminum oxide was investigated. The dependence of linear shrinkage and density on sintering temperature and dopant concentration and type was studied. X-ray analysis, microscopic examination, and electron microprobe analysis indicate that sintering occurred through a liquid phase and that Ti<sup>4+</sup> diffused into the Al<sub>2</sub>O<sub>3</sub> grains. When CaTiO<sub>3</sub>, SrTiO<sub>3</sub>, and BaTiO<sub>3</sub> were added, the compounds 3CaO · Al<sub>2</sub>O<sub>3</sub>, SrO · 6Al<sub>2</sub>O<sub>3</sub>, and BaO · 6Al<sub>2</sub>O<sub>2</sub> were formed. The sintering temperature was reduced to 1500°C by adding less than 2 mol% of magnesium, calcium, strontium, or barium titanate.</p></div>","PeriodicalId":100227,"journal":{"name":"Ceramurgia International","volume":"5 3","pages":"Pages 120-123"},"PeriodicalIF":0.0000,"publicationDate":"1979-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0390-5519(79)90017-6","citationCount":"1","resultStr":"{\"title\":\"Effect of titanate additions on sintering temperature of Al2O3\",\"authors\":\"G. Wroblewska\",\"doi\":\"10.1016/0390-5519(79)90017-6\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The effect of small additions of magnesium titanate, calcium titanate, strontium titanate, and barium titanate on the sintering temperature of aluminum oxide was investigated. The dependence of linear shrinkage and density on sintering temperature and dopant concentration and type was studied. X-ray analysis, microscopic examination, and electron microprobe analysis indicate that sintering occurred through a liquid phase and that Ti<sup>4+</sup> diffused into the Al<sub>2</sub>O<sub>3</sub> grains. When CaTiO<sub>3</sub>, SrTiO<sub>3</sub>, and BaTiO<sub>3</sub> were added, the compounds 3CaO · Al<sub>2</sub>O<sub>3</sub>, SrO · 6Al<sub>2</sub>O<sub>3</sub>, and BaO · 6Al<sub>2</sub>O<sub>2</sub> were formed. The sintering temperature was reduced to 1500°C by adding less than 2 mol% of magnesium, calcium, strontium, or barium titanate.</p></div>\",\"PeriodicalId\":100227,\"journal\":{\"name\":\"Ceramurgia International\",\"volume\":\"5 3\",\"pages\":\"Pages 120-123\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1979-07-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0390-5519(79)90017-6\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Ceramurgia International\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/0390551979900176\",\"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/0390551979900176","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Effect of titanate additions on sintering temperature of Al2O3
The effect of small additions of magnesium titanate, calcium titanate, strontium titanate, and barium titanate on the sintering temperature of aluminum oxide was investigated. The dependence of linear shrinkage and density on sintering temperature and dopant concentration and type was studied. X-ray analysis, microscopic examination, and electron microprobe analysis indicate that sintering occurred through a liquid phase and that Ti4+ diffused into the Al2O3 grains. When CaTiO3, SrTiO3, and BaTiO3 were added, the compounds 3CaO · Al2O3, SrO · 6Al2O3, and BaO · 6Al2O2 were formed. The sintering temperature was reduced to 1500°C by adding less than 2 mol% of magnesium, calcium, strontium, or barium titanate.
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