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.
万俊, 王周福, 王玺堂, 刘浩, 马妍. 低温固相反应法合成片状六铝酸镧[J]. 材料导报, 2019, 33(Z2): 154-157.
WAN Jun, WANG Zhoufu, WANG Xitang, LIU Hao, MA Yan. Synthesis of Platelet-like Lanthanum Hexa-aluminate Powder by Low-temperatureSolid State Reaction Method. Materials Reports, 2019, 33(Z2): 154-157.
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