由于Si4+和Al3+离子在莫来石晶界处扩散速率低,莫来石陶瓷难以烧结.为了降低莫来石陶瓷的烧结温度,在莫来石中添加Y203.B2O3为烧结助剂,研究了添加剂在单独和混合添加情况下对莫来石陶瓷体积密度、抗弯强度以及微观形貌等的影响.同时,研究了烧结温度及保温时间对莫来石陶瓷性能的影响.研究表明,添加剂显著地降低了莫来石的烧成温度,添加Y2O3充当烧结助剂比添加B2O3具有更好的效果,随着温度的提高,陶瓷强度由37.39MPa增至77.89MPa,体积密度由1.99g/cm3增至2.60g/cm3.
参考文献
| [1] | KONG L B;ZHANG T S;MA J et al.Anisotropic grain growth of mullite in high-energy ball milled powders doped with transition metal oxides[J].Journal of the European Ceramic Society,2003,23:2247-2256. |
| [2] | GHATE B B;HASSELMAN DPH;SPRIGGS R M .Kinetics of pressure-sintering and grain-growth of ultra-fine mullite powder[J].Ceramics International,1975,1:105-110. |
| [3] | DOKKO P C;PASK J A;MAZDIYASNI K S .High-temperature mechanical properties of mullite under compression[J].Journal of the American Ceramic Society,1977,60:150-155. |
| [4] | P. M. Souto;R. R. Menezes;R. H. G. A. Kiminami .Sintering of commercial mulite powder: Effect of MgO dopant[J].Journal of Materials Processing Technology,2009(1):548-553. |
| [5] | Anran Guo;Jiachen Liu;Rui Xu;Hai Xu;Caifen Wang .Preparation of mullite from desilication-flyash[J].Fuel,2010(12):3630-3636. |
| [6] | T. Ebadzadeh .Formation of mullite from precursor powders: sintering, microstructure and mechanical properties[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2003(1/2):56-61. |
| [7] | FIELITZ P;BORCHARDT G;MECHNICH P et al.Kinetics of alumina segregation in mullite ceramics[J].Journal of the European Ceramic Society,2008,28:401-406. |
| [8] | Isabel Santacruz;M. Isabel Nieto;Jon Binner .Gel casting of aqueous suspensions of BaTiO_3 nanopowders[J].CERAMICS INTERNATIONAL,2009(1):321-326. |
| [9] | SHE J H;MECHNICH P;SCHMUCKER M et al.Low-temperature reaction-sintering of mullite ceramics with an Y2O3 addition[J].Ceramics International,2001,27:847-852. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%