Evolution of crystallographic phases in the system (Pb_(1-x)Ca_x) TiO_3: A Rietveld study

Amreesh Chandra; Dhananjai Pandey

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Evolution of crystallographic phases in the system (Pb_(1-x)Ca_x) TiO_3: A Rietveld study

机译：（Pb_（1-x）Ca_x）TiO_3体系中晶体相的演变：Rietveld研究

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X-ray powder diffraction studies on (Pb_(1-x)Ca_x)TiO_3 ceramic powders revealed the presence of superlattice reflections due to antiphase and inphase tilts of oxygen octahedra for x ≥ 0.421. Rietveld analysis of the powder x-ray diffraction data confirmed that the structure of (Pb_(1-x)Ca_x)TiO_3 is orthorhombic with Pbnm space group and a~-a~-c~+ tilt system for x ≥ 0.421. For compositions with 0 < x ≤ 0.416, the structure was tetragonal, and the tetragonality decreased with increasing Ca~(2+) content.

机译：对（Pb_（1-x）Ca_x）TiO_3陶瓷粉末的X射线粉末衍射研究表明，由于x≥0.421的氧八面体的反相和同相倾斜，存在超晶格反射。粉末X射线衍射数据的Rietveld分析证实，（Pb_（1-x）Ca_x）TiO_3的结构为正交晶，具有Pbnm空间群和x≥0.421的a〜-a〜-c〜+倾斜系统。对于0

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《Journal of Materials Research》 |2003年第2期|p.407-414|共8页
作者
Amreesh Chandra; Dhananjai Pandey;
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作者单位

School of Materials Science and Technology, Institute of Technology, Banaras Hindu University, Varanasi ― 221005, India;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
中图分类工程材料学;
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Evolution of crystallographic phases in the system (Pb_(1-x)Ca_x) TiO_3: A Rietveld study

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