發(fā)布時(shí)間：2018-01-10 11:19

  本文關(guān)鍵詞：氯化鈰溶液噴霧焙燒制備納米氧化鈰實(shí)心粉體的研究　出處：《稀土》2017年01期 　論文類型：期刊論文

  更多相關(guān)文章： 氯化鈰 噴霧焙燒 實(shí)心納米粉

【摘要】：以氯化鈰溶液為原料,添加一定濃度的檸檬酸,在管式爐內(nèi)通過(guò)噴霧焙燒的方法制備納米氧化鈰實(shí)心微粉,在制備研究過(guò)程中,采用差熱、XRD、SEM等手段對(duì)其反應(yīng)過(guò)程、產(chǎn)物轉(zhuǎn)化率和氯根殘留的影響因素及實(shí)心粉體的制備條件進(jìn)行實(shí)驗(yàn)分析。結(jié)果表明,焙燒產(chǎn)物CeO_2的轉(zhuǎn)化率隨焙燒溫度的升高而升高,隨CeCl_3溶液濃度的升高而降低,在50 g/L濃度條件下,焙燒溫度達(dá)到800℃時(shí),轉(zhuǎn)化率可達(dá)到97.4%;與CeO_2的轉(zhuǎn)化率相反,焙燒產(chǎn)物中Cl~-的殘留量隨焙燒溫度的升高而降低,隨CeCl_3溶液濃度的升高而升高,在50 g/L濃度條件下,焙燒溫度達(dá)到800℃時(shí),焙燒產(chǎn)物中Cl~-的殘留量為0.47%;通過(guò)在氯化鈰溶液中加入不同濃度檸檬酸的的噴霧焙燒實(shí)驗(yàn)表明,焙燒溫度600℃、氯化鈰溶液濃度100 g/L、檸檬酸濃度0.029 mol/L時(shí),可以得到結(jié)晶度較高、球形度較好的CeO_2實(shí)心球粉末,且檸檬酸的加入對(duì)產(chǎn)物CeO_2的轉(zhuǎn)化率基本沒(méi)有影響。
[Abstract]:Nano-sized solid cerium oxide powder was prepared by spray roasting in tube furnace with cerium chloride solution as raw material and citric acid at a certain concentration. In the process of preparation, differential thermal analysis (DTA) XRD was used. SEM was used to analyze the reaction process, the factors affecting the conversion rate of the product and the residual chlorides, and the preparation conditions of solid powders. The results showed that. The conversion of CeO_2 increased with the increase of calcination temperature and decreased with the increase of CeCl_3 concentration. At the concentration of 50 g / L, the calcination temperature reached 800 鈩，

本文編號(hào)：1405063