發(fā)布時間：2018-06-26 00:40

  本文選題：電化學(xué) + 氫氧化鋁　； 參考：《化工學(xué)報》2017年09期

【摘要】：以99.99%高純鋁板為陽極原料,采用電化學(xué)方法制備氧化鋁前體氫氧化鋁,討論分析了氫氧化鋁的焙燒溫度、保溫時間對制備高純超細(xì)氧化鋁的影響,考察了不同電流密度放電對氧化鋁形貌和粒度的影響。結(jié)果表明:在70 m A·cm~(-2)的較高電流密度下鋁/空氣電池放電過程可得到平均粒度為268 nm的氫氧化鋁;制備的氫氧化鋁經(jīng)洗滌,在1400℃焙燒,保溫3 h,可得到平均粒度為200 nm,形貌為近似球狀的99.99%的超細(xì)氧化鋁粉體;而低電流密度所得氧化鋁顆粒團(tuán)聚嚴(yán)重。主要原因是高電流密度使放電過程中產(chǎn)生的氫氧化鋁晶體的介穩(wěn)區(qū)寬度變窄所致。
[Abstract]:Using 99.99% high purity aluminum plate as anode material, alumina precursor aluminum hydroxide was prepared by electrochemical method. The effects of calcination temperature and holding time of aluminum hydroxide on the preparation of high purity ultrafine alumina were discussed and analyzed. The effect of current density discharge on the morphology and particle size of alumina was investigated. The results show that aluminum hydroxide with an average particle size of 268nm can be obtained under the high current density of 70 Ma cm ~ (-2), and the prepared aluminum hydroxide is washed and roasted at 1400 鈩，

本文編號：2068255