Preparations and Properties of Amorphous LaAl1-xGaxO3

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Preparations and Properties of Amorphous LaAl1-xGaxO3
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Affiliation:School of Materials Science and Engineering,Northeastern University,School of resources and materials,Northeastern University at Qinhuangdao,School of resources and materials,Northeastern University at Qinhuangdao,School of Materials Science and Engineering,Northeastern University,Key Laboratory of Dielectric and Electrolyte Functional Materials Hebei Province,School of Resource and Material,Northeastern University at Qinhuangdao
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In this paper, LaAl1-xGaxO3 powder and its amorphous sphere have been prepared by sol-gel method and containerless solidification technology, respectively. Ga3+is used to substitute Al3+ in B-site with the composition of x from 0 to 1. The X-ray diffraction results show that powders with no impurity phase were obtained when calcined at 850℃ which are all perovskite structure. The transparent spheres are proved to be amorphous by XRD analysis. With the increase of Ga₃₊ content, the dielectric constant ranges from 15 to 19 at 100KHz and it￠s corresponding dielectric loss is smaller than that of 0.007. The amorphous material has a low leakage current of 10-1A/cm2, and showed a high refractive index, which was more than 1.8 in 633nm.

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[Zhang Min, Zhang Xiaoyan, Qi Xiwei, Li Ying, Peng Bin. Preparations and Properties of Amorphous LaAl_1-xGa_xO₃[J]. Rare Metal Materials and Engineering,2018,47(S1):83~86.]
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Received:May 31,2017
Revised:May 31,2017
Adopted:January 29,2018
Online: October 22,2018
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