(上海大學(xué) 鋯材料研究中心 上海 200072)
摘 要: 比較了采用直接煅燒、 干燥后煅燒、 噴霧干燥等3種方法處理水合ZrO2， 再通過(guò)氣流粉碎獲得超微細(xì)粉ZrO2； 同時(shí)用激光衍射法、 光透法、 場(chǎng)發(fā)射掃描電鏡和BET法測(cè)試了粉末的性能。 結(jié)果表明： 直接煅燒水合ZrO2獲得的粉末團(tuán)聚嚴(yán)重， 顆粒粗而均勻性差； 水合ZrO2通過(guò)低溫靜止干燥， 可以減少顆粒的團(tuán)聚， 提高粉末顆粒分布的均勻性， 但效率低； 噴霧干燥法處理水合ZrO2， 通過(guò)動(dòng)態(tài)反應(yīng)， 易獲得細(xì)晶粒的球狀顆粒， 可避免粉末的團(tuán)聚， 且粉末分散性好、 晶粒分布均勻。
關(guān)鍵字: 水合氧化鋯； 噴霧干燥； 光透法； 場(chǎng)發(fā)射掃描電鏡； 超微細(xì)粉
spray drying method
（ Zirconium Materials Research Center, Shanghai University, Shanghai 200072, China）
Abstract: Three methods were used to treat hydrous ZrO2 such as direct sintering, sintering after drying, spray dring, then the ultra-fine ZrO2 powder was prepared by air-jet milling. The physical properties were tested by laser diffractrometry, light transmission, field emission scanning electron microscopy and Brunauer-Emmett-Teller(BET). The results that, the powder sintered directly are agglomerated greatly, rough and not well-distributed. The powder sintered after drying, through static reaction, has lower agglomeration and better distribution, but lower efficiency. The ultra-fine powder prepared by spray drying method, through the dynamic reaction, not only can prohibit the agglomeration and be obtained easily, but also has well-distributed and good dispersibility.
Key words: hydrous ZrO2; spray drying; light transmission method; field emission SEM; ultra-fine powder
