| Effect of Y2O3, CeO2 on Sintering Properties of Si3N4 Ceramics |
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| 作者姓名： | 苏盛彪 包亦望 王黎 李竟先 |
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| 作者单位： | [1]KeyLaboratoryforAdvancedCeramics,ChinaBuildingMaterialAcademy,Beijing100024 [2]DepartmentofMaterialsScience,SouthChinaUniversityofScienceandTechnology,Guangzhou510641,China |
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| 基金项目： | ProjectsupportedbytheNationalOutstandingYoungScientistFoundation ( 5 0 12 5 2 0 4)，theNationalScienceFoundationofChina ( 5 990 2 0 0 7)，theScienceFoundationofBeijing ( 2 0 0 2 0 19)，863Program ( 2 0 0 1AA3 3 90 10 ) |
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| 摘 要： | The effect of rare earth oxides Y203 or Ce02 on sintering properties of Si3N4 ceramics was studied and the mechanism of assisting action during sintering was analyzed. The results in dicate that the best sintering properties appear in Si3N4 ceramics with 5% Y203 or 8% CeO2. Secondary crystallites are formed at grain boundaries after heat treatment,which decreases the amount of glass phase and contributes to the improvement of high-temperature mechanical properties of silicon nitride.
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| 关 键 词： | 稀土 氧化钇 氧化铈 氮化硅陶瓷 烧结特性 |
Effect of Y2O3, CeO2 on Sintering Properties of Si3N4 Ceramics |
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| Su Shengbiao ,Bao Yiwang ,Wang Li ,Li Jingxian.Effect of Y2O3, CeO2 on Sintering Properties of Si3N4 Ceramics[J].Journal of Rare Earths,2003,21(3):357-359. |
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| Authors: | Su Shengbiao Bao Yiwang Wang Li Li Jingxian |
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| Affiliation: | Su Shengbiao 1*,Bao Yiwang 1,Wang Li 1,Li Jingxian 2 |
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| Abstract: | The effect of rare earth oxides Y 2O 3 or CeO 2 on sintering properties of Si 3N 4 ceramics was studied and the mechanism of assisting action during sintering was analyzed. The results indicate that the best sintering properties appear in Si 3N 4 ceramics with 5% Y 2O 3 or 8% CeO 2. Secondary crystallites are formed at grain boundaries after heat treatment, which decreases the amount of glass phase and contributes to the improvement of high temperature mechanical properties of silicon nitride. |
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| Keywords: | additive Si 3N 4 ceramics sintering properties rare earths |
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