( 東北大學 材料與冶金學院， 沈陽 110004)
摘 要: 以La2O3、 HCl為原料制備了LaCl3， 并直接用雙柱法，以 LaCl3溶液同NH4HCO3溶液作用合成了粒度較小的La2(CO3)3粉體；以粉體La2(CO3)3為鑭源與NH4F混合， 在微波作用下經過固相化學反應，合成了LaF3超細粉；研究了不同分散劑等反應條件對合成LaF3超細粉的粒度和純度的影響；通過X射線衍射（XRD）檢測了不同途徑合成的LaF3超細粉體的純度，通過掃描電鏡（SEM）、 透射電鏡（TEM）測試了不同途徑合成的LaF3超細粉體顆粒的粒度和形貌。結果表明： 用乙醇作為分散劑經微波加熱固相合成得到了純度較高， 平均粒度約為50nm的LaF3超細粉。
關鍵字: LaF3；微波； 超細粉
WU Yu-feng,AN Shou-yong, ZHAI Yu-chun
（ School of Materials and Metallurgy， Northeastern University, Shenyang 110004， China）
Abstract: The LaF3 superfine powder was synthesized. Superfine powder of La2(CO3)3 was first synthesized by means of double pillar method in the reaction that LaCl3 solution(got from La2O3, HCl as raw material ) reacted with NH4HCO3 solution.Then LaF3 superfine powder was got by means of mixing solid La2(CO3)3 and NH4F under the microwave condition when the diluent of H2O and C2H5OH were used.The influence of diluent (H2O, C2H5OH) on grain degree or pure degree was discussed. The crystal purity of LaF3 superfine powder was tested by XRD.The granularity and shape of LaF3 superfine powder was tested by SEM and TEM. The results show that the purity of LaF3 superfine powder is very well when used C2H5OH by means of microwave heat, and LaF3 superfine powder is 50nm in size in the direct solid synthesis.
Key words: LaF3； microwave； superfine powder
