研究了SiC基泡沫陶瓷的载体软质聚氨酯泡沫塑料的表面处理对泡沫陶瓷性能的影响.选用不同浓度的聚乙烯亚胺(PEI)溶液作为表面活化剂.研究结果表明,活化液浓度太高或太低,泡沫陶瓷的强度都不高.PEI既是活化剂,本身又是有机物,浓度小了不能达到良好的活化效果,浓度过大又会由于引入大量的有机物,使坯体烧结过程中有机物挥发阶段发气剧烈,使得坯体开裂,影响陶瓷体的强度.最佳的活化浓度下活化2h泡沫陶瓷的抗压强度为未活化的3倍.
参考文献
[1] | Casfledine T J.Use of filter materials in gating systems[J].Foundry Trade Journal,1985(06):15-21. |
[2] | Khan P R;Su W M.Flow of ductile iron through ceramic filters and the effects on the dross and fatigue properties[J].AFS Transactions,1987(95):105-112. |
[3] | Schwartzwalder,SomessA V[P].US 3090094,1963. |
[4] | Ravault E G .Production of Porous Ceramic Materials[P].US 4004933,1977. |
[5] | Feke D L.Stability and rheology of dispersions of silicon nitride and silicon carbide NASA Contractor[M].NASA Report 179634,1987 |
[6] | Myers C.Surfactant Science and Technology[M].New York:VCH Publishers Inc,1988:273. |
[7] | T C巴顿;郭隽奎;王长卓.涂料流动和颜料分散:流变学方法探讨涂料及油墨工艺学[M].北京:化学工业出版社,1988:333-352. |
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