A novel method of synthesis and microstructural investigation of calcium titanate powders

被引：21
|
作者：
Lei, Xianjun [2 ,3 ,4 ]
Xu, Baoqiang [1 ,2 ,3 ]
Yang, Bin [2 ,3 ]
Xu, Binbin [2 ,3 ,4 ]
Guo, Xutao [1 ,2 ,3 ]
机构：
[1] Kunming Univ Sci & Technol, State Key Lab Complex Nonferrous Met Resources Cl, Kunming 650093, Peoples R China
[2] Kunming Univ Sci & Technol, Natl Engn Lab Vacuum Met, Kunming 650093, Peoples R China
[3] Kunming Univ Sci & Technol, Yunnan Prov Key Lab Nonferrous Vacuum Met, Kunming 650093, Peoples R China
[4] Kunming Univ Sci & Technol, Met & Energy Engn, Kunming 650093, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 690卷
基金：
美国国家科学基金会;
关键词：
Calcium titanate; Perovskite structure; Thermal sintering method; Microstructure; Calcium chloride bihydrate; TITANIUM-DIOXIDE; CATIO3; PEROVSKITE; TEMPERATURES; DIFFRACTION; FABRICATION; REDUCTION; BEHAVIOR; ANATASE; RUTILE;
D O I：
10.1016/j.jallcom.2016.08.213
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A novel method, using calcium chloride bihydrate (CaCl2. 2H(2)O and TiO2) as raw materials, to synthesize crystalline calcium titanate (CaTiO3) has been investigated by thermodynamic calculation and X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), differential scanning calorimetric-thermogravimetric analysis (DSC-TG), high resolution transmission electron microscopy (HR-TEM) etc. Using XRD technique analyzed experimental results revealed success of thermal sintering process, in which the mass ratio of M CaCl2 center dot 2H(2)O/M-Tio2 = 2:1, holding temperature of 1073 K, preservation time 2 h, could be used to produce crystalline CaTiO3 powders. Ratio of Ca/Ti/O = 1:1:3 was verified by EDS pot-scan. According to SEM observation, the crystalline CaTiO3 powders are mainly composed of many separated particles with average size approximately 10 mu m and have been demonstrated a strongly faceted morphology. The lattice plane, (112) is clearly observed in the HR-TEM micrograph and the lattice distance was measured as 0.27 nm. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：916 / 922
页数：7
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