Materials Reports  2019, Vol. 33 Issue (Z2): 154-157 |
| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Synthesis of Platelet-like Lanthanum Hexa-aluminate Powder by Low-temperatureSolid State Reaction Method |
| WAN Jun, WANG Zhoufu, WANG Xitang, LIU Hao, MA Yan
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| The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081 |
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Abstract The lanthanum hexa-aluminate precursor was synthesized by low-temperature solid state reaction using aluminum nitrate nonahydrate and lanthanum nitrate hexahydrate as starting materials, and the citric acid as complex former. Lanthanum hexa-aluminate powders were formed by calcining the precursor. The composition and the thermo-decomposing process of the precursor were investigated by FTIR and TG-DSC. The phase constitution and morphology of as-synthesized powders were characterized by XRD, SEM and TEM. The results show that lanthanum hexa-aluminate crystal begin to form at 1 300 ℃. With the increase of calcination temperature, the morphology of lanthanum hexa-aluminate gra-dually develops into hexagonal platelet structure. Pure lanthanum hexa-aluminate powders can be synthesized at 1 500 ℃. At 1 600 ℃, the ave-rage grain size of as-synthesized lanthanum hexa-aluminate powders are about 7.25 μm,which display a bimodal distribution.
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Published: 25 November 2019
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| Fund:This work was financially supported by the National Natural Science Foundation of China (51672195,51474166) and Key Program of Natural Science Foundation of Hubei Province, China (2017CFA004). |
About author:: Jun Wan, a postgraduate in Wuhan University of Science and Technology. His research interests focus on design and fabrication technology of advanced refractories.
Zhoufu Wang is currently a professor and doctoral supervisor in Wuhan University of Science and Technology. He performed collaborative research in 2007—2008 in Department of Engineering Materials (University of Sheffield). He has published more than 80 journal papers, applied 41 national patents and 22 of them were authorized. His team’s research interests are high-tech ceramic powders, microstructure design and perfor-mances of refractories, refractories for advanced smelting technologies, advanced insulation materials, and so on. |
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1 Cinibulk M K. Journal of Materials Science Letters,1995,14(9),651.
2 Friedrich C, Gadow R, Schirmer T. Journal of Thermal Spray Technology,2001,10(4),592.
3 Gadow R, Lischka M. Surface & Coatings Technology,2002,s151-152(1),392.
4 李永峰,李宇,余林,等.燃料化学学报,2012,40(1),100.
5 Collongues R, Vivien D. Journal of Solid State Chemistry,1992,96(96),97.
6 Naga S M, Hassan A M, El-Maghraby H F, et al. International Journal of Refractory Metals & Hard Materials,2016,54,230.
7 Tang H, Fang M, Tang C, et al. Materials Science & Engineering A,2015,655,160.
8 Wu Y Q, Zhang Y F, Huang X X, et al. Journal of Materials Science,2001,36(17),4195.
9 Rao R R, Mariappan L. Advances in Applied Ceramics,2005,104(5),268.
10 Jana P, Jayan P S, Mandal S, et al. Journal of Crystal Growth,2014,408,7.
11 Svensson E E. Applied Catalysis B Environmental,2008,84(1),241.
12 占文,王周福,张保国,等.稀有金属材料与工程,2009,38(S2),34.
13 管洪波,王培,赵璧英,等.催化学报,2006,27(9),793.
14 杨承燕,王玺堂,马妍,等.人工晶体学报,2013,42(11),2309.
15 万俊,王周福,田政权,等.机械工程材料,2017,41(2),63.
16 Zhang Y, Li Q, Ma X, et al. Materials Letters,2008,62(6-7),923.
17 Ropp R C, Carroll B. Journal of the American Ceramic Society,1980,63(7-8),416.
18 杨南如.无机非金属材料测试方法(重排本),武汉理工大学出版社,2011.
19 王峰.原位合成棒状LaAl11O18对Al2O3陶瓷烧结行为及力学性能的影响.硕士学位论文,青岛大学,2013. |
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