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俄科学家研制成功氮氧化铝陶瓷制备新方法

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山东陶瓷 第4O卷 塞[P].CN:104009398,2014—8—27. of the micr0stucture[J].Journal of the European Ceramic [3] Liebault,J.,Bigarre,J.,Treheux,D.,Goeuriot,D.and Society,2007,27:1193—1197. Thevenot,F. Influence of microstructural parameters on [6]Yutaka Saito.Kinetics of property change associated with dielectric properties of polyerystalline alumina[J].In CSC3 atmospheric humidity changes in alumina powder granules Proceedings,SFV,1998,PP.391—400. with PVA binder[J].Journal of the European Ceramic So— [4] Liebault,J.,Vallayer J.How the trapping of charges can ciety,2002,22:2835—2840. explain the dielectric breakdown performance of alumina ca— [7]NIES C.W.,MESSING G.L.Effect of glass—transition ramies[J].Journal of the European Ceramic Society,2001, temperature of polyethylene glycol——plasticized polyvinyl 29:389—397. alcohol on granule compaction[J].Journul of the American [53 Touzin M..Relationships between dielectric breakdown re— Ceramic Society,1984,67:301—304. sistance and charge transport in alumina materials—effects Research of Densification and Dielectric Strength of Spark Plug Alumina Ceramic Chen Long ,Wang Weiqiang ,Hong Minfu ,Zhao Shifang (1.Zhuzhou Torch Spark Plug Co.,Ltd,ZhuZhou 412002,China; 2.Department of Material Science&Engineering,Central South University,ChangSha 410083,China) Abstract:The effects of molding pressure,particle plasticizing,granulation method on densification and dielectric strength of spark plug alumina ceramic were studied.The results indicate that the densi— fication and dielectric strength of alumina ceramic is elevated with the increased molding pressure. Plasticizer PEG can reduce the strength of ceramic powder particle,which also improve the densifica— tion and dielectric strength of alumina ceramic.The proper addition of PEG iS 0.5 to the total solid weight.The sample’S performance of centrifugal tower is better than that of pressure tower. Key words:Spark Plug;Alumina Ceramic;Dielectric Strength;Plasticizer PEG;Spray Dry 俄科学家研制成功氮氧化铝陶瓷制备新方法 近日,俄国立核能研究大学莫斯科工程物理学院、莫斯科国立测量与制图大学、俄科学院结构宏观 动力学与材料学研究所、俄科学院巴依科夫冶金与材料学研究所的科学家团队,成功研制出一种制备透 明氮氧化铝陶瓷的新方法,相关论文已发表于《材料科学与工程》物理学会期刊。 俄科学家在制备透明氮氧化铝陶瓷中采用的方法主要基于等离子火焰烧结法,新颖之处在于研究 人员不是通过额外的加热器来加热氮氧化铝粉末,而是通过向冲压模具主体及冲压头释放脉冲电流来 加热原料。这种方法的优点在于能够迅速加热氮氧化铝粉末,从而缩短制备周期。 氮氧化铝陶瓷作为一种具有极高硬度的透明材料,其硬度甚至超过石英玻璃,包括熔融石英、尖晶 石及透明蓝宝石。除具有很强的硬度外,它还拥有良好的弹性,这些特性使该材料在国防、航天等领域 具有很广阔的应用前景。 

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