NH_4Cl电解质对Y-TZP陶瓷粉体团聚状态的影响

INFLUENCE OF NH4Cl ELECTROLYTE ON THE STATE OF AGGLOMERATION OF YTZP POWDER

研究了用共沉淀法在沉淀反应溶液中ＮＨ４Ｃｌ电解质含量对ＹＴＺＰ陶瓷粉体团聚状态的影响和粉体的烧结性能。实验结果表明，较低的ＮＨ４Ｃｌ含量会造成粉体的团聚；但高于某浓度值后，ＮＨ４Ｃｌ将显著改善粉体的团聚状态，使粉体团聚强度降低、团聚体尺寸减小和烧结性能提高。在沉淀反应溶液中加入适量ＮＨ４Ｃｌ电解质，将起到分散剂的作用，有利于提高粉体的分散性。

Effect of NH4Cl electrolyte on the state of agglomeration and the sintering behavior of YTZP powder prepared by coprecipitation are discussed in this paper.Experimental results show that at low content of NH4Cl,NH4Cl causes the agglomerate formation of precipitated particles,on the contrary,NH4Cl effectively improves the state of agglomeration of YTZP powder,that exhibits low agglomerate strength,small agglomerate size and high sinterability,when the NH4Cl content is properly increased.