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241 results on '"Yin, Qingrui"'

43. Martensitelike spontaneous relaxor-normal ferroelectric transformation in Pb(Zn1/3Nb2/3)O3–PbLa(ZrTi)O3 system.

Author

Deng, Guochu, Ding, Aili, Li, Guorong, Zheng, Xinsen, Cheng, Wenxiu, Qiu, Pingsun, and Yin, Qingrui

Subjects
MARTENSITIC transformations, FERROELECTRIC devices, MARTENSITE, FERROELECTRICITY, PHASE equilibrium, SOLID state electronics
Abstract

The spontaneous relaxor-normal ferroelectric transformation was found in the tetragonal composition of Pb(Zn1/3Nb2/3)O3–PbLa(ZrTi)O3 (0.3PZN–0.7PLZT) complex ABO3 system. The corresponding dielectric permittivities and losses of different compositions located near the morphotrophic phase boundary were analyzed. By reviewing all of the results about this type of transformation in previous references, the electric, compositional, structural, and thermodynamic characteristics of the spontaneous relaxor-normal transformation were proposed. Additionally, the adaptive phase model for martensite transformation proposed by Khachaturyan et al. [Phys. Rev. B 43, 10832 (1991)] was introduced into this ferroelectric transformation to explain the unique transformation pathway and associated features such as the tweedlike domain patterns and the dielectric dispersion under the critical transition temperature. Due to the critical compositions near the MPB, the ferroelectric materials just fulfill the condition, in which the adaptive phases can form in the transformation procedure. The formation of the adaptive phases, which are composed of stress-accommodating twinned domains, makes the system bypass the energy barrier encountered in conventional martensite transformations. The twinned adaptive phase corresponds to the tweedlike domain pattern under a transmission electronic microscope. At lower temperature, these precursor phases transform into the conventional ferroelectric state with macrodomains by the movement of domain walls, which causes a weak dispersion in dielectric permittivity. [ABSTRACT FROM AUTHOR]

Published
2005
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44. Nanoscale Elastic Response of Grain Boundaries in ZnO Varistors by Acoustic Mode AFM

Author

Cheng Li-Hong, Zeng Jiang-Tao, Song Hong-Zhang, Yin Qingrui, Li Guorong, Hui Sen-Xing, Zhao Kun-Yu, Zeng Hua-Rong, and Cai Wen-Jie

Subjects
Inorganic Chemistry, Scanning probe microscopy, Materials science, Atomic force microscopy, Mode (statistics), Varistor, General Materials Science, Grain boundary, Composite material, Nanoscopic scale
Published
2009

45. Computer-controlled image acquisition and processed system for scanning electron -acoustic microscopy

Author

Zhang Bingyang, Yin Qingrui, Yang Yang, Hui Sen-Xing, and Jiang Fuming

Subjects
Materials science, Scanning electron microscope, Acoustics, ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, Acoustic microscopy, Electron, Condensed Matter Physics, Piezoelectricity, Signal, Electronic, Optical and Magnetic Materials, Signal-to-noise ratio, Data acquisition, visual_art, visual_art.visual_art_medium, Ceramic
Abstract

Scanning Electron Acoustic Microscopy(SEAM) with the piezoelectric ceramic sensor is a novel instrument in materials analysis. Normally the signal detected by the sensor is very weak. Signal to noise ratio should be enhanced in order to observe electron acoustic image with good quality. In this paper, the time averaging data acquisition system with computer was described and the data transferred into imaging were processed with a computer. Electron acoustic pictures on PZT-type materials were shown in real time and refined and memorized in computer. Results can also be recalled on the screen at any time.

Published
1997

46. Photoacoustic study of some ferroelectric ceramics and related materials

Author

Yang Yang, Yin Qingrui, Jiang Fuming, and Zhang Bingyang

Subjects
Photoacoustic effect, Materials science, business.industry, Ferroelectric ceramics, Diamond, engineering.material, Condensed Matter Physics, Piezoelectricity, Electronic, Optical and Magnetic Materials, Residual stress, visual_art, visual_art.visual_art_medium, engineering, Optoelectronics, Photoacoustic Techniques, Ceramic, Thin film, business
Abstract

Photoacoustic techniques including photoacoustic comprehensive measurement meter, photoacoustic spectroscope and electron acoustic microscope were used to study the photoacoustic effect of piezoelectric ZnO thin films and the piezoelectric coefficients(e33, e31), the phase transition in ferroelectric ceramics, PSZT and semiconductor BaTiO3 ceramics, spatial distributions of polarization in PSZT ceramics, direct observation of domain structures of BaTiO3 ceramics, surface and subsurface texture of diamond film, residual stress distribution of sodium glass and polycrystalline aluminum. The results show that the photoacoustic techniques have their own advantages over the existed methods. The experimental set-up and the generation mechanism of the acoustic signal were also described in the paper.

Published
1997

47. Application of scanning electron acoustic microscope to ferroelectric semiconductor material:BaTiO3+Y2O3

Author

Zhang Bingyang, Yang Yang, Jiang Fuming, and Yin Qingrui

Subjects
Materials science, business.industry, Scanning electron microscope, Electron, Condensed Matter Physics, Signal, Ferroelectricity, Electronic, Optical and Magnetic Materials, Condensed Matter::Materials Science, Optics, Amplitude, Semiconductor, visual_art, visual_art.visual_art_medium, Ceramic, business, Acoustic microscope
Abstract

In this paper, Scanning Electron Acoustic Microscope (SEAM) is used to investigate ferroelectric semiconductor ceramics BaO3+Y2O3. The linear electron acoustic amplitude images about the nature surface features of this material were successfully obtained at different modulated frequencies. Electron acoustic signal generation and image contrast mechanisms are discussed. By means of analyzing surface and subsurface structure, ferroelectric and semiconductor properties of ferroelectric semiconductor materials from electron acoustic images we try to build a new way to characterize ferroelectric semiconductor materials on a micro-scale.

Published
1997

49. Effect of grain size on domain structures, dielectric and thermal depoling of Nd-substituted bismuth titanate ceramics

Author

Viola, Giuseppe, primary, Boon Chong, Kok, additional, Eriksson, Mirva, additional, Shen, Zhijian, additional, Zeng, Jiangtao, additional, Yin, Qingrui, additional, Kan, Yanmei, additional, Wang, Peiling, additional, Ning, Huanpo, additional, Zhang, Hongtao, additional, Fitzpatrick, Michael E., additional, Reece, Michael J., additional, and Yan, Haixue, additional

Published
2013
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