Synthesis and Characterization of Lanthanum Aluminate Powder by Low Temperature Solid State Reaction Method
摘 要
以九水合硝酸铝、六水合硝酸镧为原料,柠檬酸为络合剂,通过低温固相反应法制备铝酸镧前驱体,分析了该前驱体的组成及热分解过程;将铝酸镧前驱体在不同温度下煅烧制备铝酸镧粉体,研究了铝酸镧粉体的合成温度以及煅烧温度对铝酸镧粉体形貌、粒径和比表面积的影响。结果表明:铝酸镧前驱体中形成了含有La-O-Al键的络合物,当煅烧温度达到700℃时开始生成铝酸镧晶体;随着煅烧温度的升高,铝酸镧晶体的晶格畸变程度减小,晶粒逐渐长大,粉体结晶度不断提高,粒径则逐渐减小;在1 000℃煅烧得到铝酸镧粉体的粒径最小,为0.310 μm,比表面积最大,为16.58 m2·g-1。
Abstract
The lanthanum aluminate precursor was prepared by the low temperature solid state reaction method using aluminum nitrate nonahydrate and lanthanum nitrate hexahydrate as raw materials and citric acid as complexant. The composition and thermal decomposition process of the precursor were analyzed. Then the lanthanum aluminate precursor was calcined at different temperatures to obtain the lanthanum aluminate powder. The synthesis temperature and the calcination temperature effect on the morphology, grain size and specific surface area of the lanthanum aluminate powder were all studied. The results show that the complex compound containing La-O-Al bond was formed in the lanthanum aluminate, and when the calcination temperature reached 700℃, the lanthanum aluminate grains began to form. With the increase of the calcination temperature, the lattice distortion of the lanthanum aluminate grain decreased and the grain size gradually increased, while the crystallinity of the powder increased and the powder particle size decreased gradually. At the calcination temperature of 1 000℃, the obtained lanthanum aluminate powder had the minimal particle size of 0.310 μm and the maximal specific surface area of 16.58 m2·g-1.
中图分类号 TQ174.75 DOI 10.11973/jxgccl201702013
所属栏目 新材料 新工艺
基金项目 湖北省自然科学基金重点资助项目(2012FFA102);国家自然科学基金资助项目(51474166)
收稿日期 2015/12/10
修改稿日期 2016/12/19
网络出版日期
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备注万俊(1991-),男,河南驻马店人,硕士研究生。
引用该论文: WAN Jun,WANG Zhou-fu,TIAN Zheng-quan,LIU Hao,WANG Xi-tang,MA Yan. Synthesis and Characterization of Lanthanum Aluminate Powder by Low Temperature Solid State Reaction Method[J]. Materials for mechancial engineering, 2017, 41(2): 63~66
万俊,王周福,田政权,刘浩,王玺堂,马妍. 低温固相反应法合成铝酸镧粉体及表征[J]. 机械工程材料, 2017, 41(2): 63~66
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【4】ADAK A K, PRAMANIK P. Synthesis and characterization of lanthanum aluminate powder at relatively low temperature[J]. Materials Letters, 1997, 30(4):269-273.
【5】王修慧, 吴晓琳, 翟玉春,等. 醇盐水解法制备铝酸镧粉体[J]. 稀有金属材料与工程, 2007, 36(增刊1):62-64.
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【8】俞建群, 贾殿赠, 张慧,等. CdS纳米粉体的合成新方法——一步室温固相化学反应法[J]. 化学通报, 1998(2):35-37.
【9】管洪波, 王培, 赵璧英,等. 低温固相法制备高比表面积的纳米MgO[J]. 催化学报, 2006, 27(9):793-798.
【10】占文, 王周福, 张保国,等. 低热固相法合成镁铝尖晶石[J]. 稀有金属材料与工程, 2009, 38(增刊2):34-37.
【11】曾雄辉, 赵广军, 张连翰,等. 铝酸镧单晶体中Ce3+的能级结构和荧光特性[J]. 物理学报, 2005, 54(2):612-616.
【12】黄国华, 周东祥, 徐建梅,等. 液相混合法合成铝酸镧的研究[J]. 华中科技大学学报(自然科学版), 2004(2):52-53.
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