The invention relates to a preparation technology of high purity Y: 2 SiO: 5 new ceramic materials, in particular to a method for preparing low temperature bulk dense high-purity single-phase Y: 2 SiO: 5 ceramic materials. In the case of raw materials Y 2 O: 3 and SiO: 2 mixture additive LiYO down 2, the content of additive for Y: 2 O: 3, SiO: 2 and LiYO: 2 of the total mass of 0.2 ~ 10%. After mixing, calcining, calcining temperature of 1250 DEG to 1600 DEG C, calcination time is 1 ~ 5 hours, to obtain high purity single-phase Y down 2: SiO 5 powder. The powder obtained by ball milling powder after loading high strength steel mould in unidirectional cold pressing or cold isostatic pressing, get the relative density is 45 ~ 65% green, in high temperature air or oxygen furnace furnace in pressureless sintering, the sintering temperature is 1100 to 1600 DEG C, the sintering time is 0.5 ~ 2.5 hours, the the theory of product density density of 85 ~ 100%. The invention can be at a relatively low temperature preparation of bulk dense single phase with high purity by Y: 2 SiO: 5 ceramic materials, can be used as high temperature structural materials, oxidation protective coating, has a broad application prospect in aviation, aerospace.
【技术实现步骤摘要】
【技术保护点】
一种低温制备大块致密高纯单相Ｙ↓［２］ＳｉＯ↓［５］陶瓷材料的方法，其特征在于：制备过程由两步组成，先制备Ｙ↓［２］ＳｉＯ↓［５］陶瓷粉料，在原料Ｙ↓［２］Ｏ↓［３］和ＳｉＯ↓［２］混合物中加入添加剂ＬｉＹＯ↓［２］，Ｙ↓［２］Ｏ↓［３］和ＳｉＯ↓［２］的摩尔比例为１∶（０．７～１．５），添加剂ＬｉＹＯ↓［２］的含量为Ｙ↓［２］Ｏ↓［３］、ＳｉＯ↓［２］和ＬｉＹＯ↓［２］总质量的０．２～１０．０％；混合均匀后进行煅烧，煅烧温度为１２５０℃～１６００℃，煅烧时间为１～５小时，得到高纯单相Ｙ↓［２］ＳｉＯ↓［５］粉末，粉末经球磨得到超细粉后，再将粉料成型得到生坯进行无压烧结，烧...
【技术特征摘要】
【专利技术属性】
技术研发人员：周延春，孙子其，李美栓，
申请(专利权)人：中国科学院金属研究所，
类型：发明
国别省市：89[中国|沈阳]
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