The Structure, Sizeeffect of Calcium Modified Lead Titanate Nanocrystal, Pb0.85Ca0.15TiO3

Chemical Research in Chinese Universities ›› 1999, Vol. 15 ›› Issue (2): 158-162.

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The Structure, Sizeeffect of Calcium Modified Lead Titanate Nanocrystal, Pb_0.85Ca_0.15TiO₃

FU Hong-gang¹, QIANG Liang-sheng¹, XU Chong-quan¹, ZHAN Zhi-qian¹, ZHANG Xin², YU Hai-tao², ZHANG Yan-yi², huang Li³

1. Department of Applied Chemistry, Harbin University of Technology, Harbin, 150001;
2. School of Chemistry and Engineering, Heilongjiang University, Harbin, 150080;
3. Lab. of Enhanced Oil Recovery Rate of Institution of E. and D., Daqing, 163712

Received:1998-06-10 Online:1999-04-24 Published:2011-08-17
Supported by:
Supported by the Natural Science Foundation of Heilongjiang Province.

Abstract

Abstract: Calcium modified lead titanate nanocrystal material Pb_0.85Ca_0.15TiO₃ was syn thesized by means of a sol-gel method. The changes of crystal structure, grain-size of the samples were investigated under different conditions of heat treatment. the results show that the tetragonal symmetry is reduced, the ferroelectricparaelectric phase transformation temperature is decreased with the reduce of the grainsize of the sample. the critical grain-size for the ferroelectric-paraelectric phase transformation at room temperature was calculated. The change regularities of the lattice constant, tetragonality with the grain-size are discussed.

Key words: PTC15, Nanocrystal, Crystal structure, Size effect

FU Hong-gang, QIANG Liang-sheng, XU Chong-quan, ZHAN Zhi-qian, ZHANG Xin, YU Hai-tao, ZHANG Yan-yi, huang Li. The Structure, Sizeeffect of Calcium Modified Lead Titanate Nanocrystal, Pb_0.85Ca_0.15TiO₃[J]. Chemical Research in Chinese Universities, 1999, 15(2): 158-162.

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The Structure, Sizeeffect of Calcium Modified Lead Titanate Nanocrystal, Pb_0.85Ca_0.15TiO₃

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