Temperature dependence of electromechanical properties of PLZT �?/57/43 ceramics

Bulletin of materials science

A K Shukla¹  S L Srivastava²  Janardan Singh³  I M L Das²  V K Agrawal² 

[1] Department of Physics, University of Allahabad, Allahabad 211 002, India$$Presently at Department of Physics, Amity School of Engineering & Technology, Amity University, Sec. 125, Noida, G. B. Nagar, UP, India$$Department of Physics, University of Allahabad, Allahabad 211 002, IndiaDepartment of Physics, University of Allahabad, Allahabad 211 002, India$$Presently at Department of Physics, Amity School of Engineering & Technology, Amity University, Sec. 125, Noida, G. B. Nagar, UP, India$$Presently at Department of Physics, Amity School of Engineering & Technology, Amity University, Sec. 125, Noida, G. B. Nagar, UP, IndiaDepartment of Physics, University of Allahabad, Allahabad 211 002, India$$Presently at Department of Physics, Amity School of Engineering & Technology, Amity University, Sec. 125, Noida, G. B. Nagar, UP, India$$;Department of Physics, University of Allahabad, Allahabad 211 002, India$$Department of Physics, University of Allahabad, Allahabad 211 002, IndiaDepartment of Physics, University of Allahabad, Allahabad 211 002, India$$;National Physical Laboratory, Dr K S Krishnan Road, New Delhi 110 012, India$$National Physical Laboratory, Dr K S Krishnan Road, New Delhi 110 012, IndiaNational Physical Laboratory, Dr K S Krishnan Road, New Delhi 110 012, India$$

关键词: PLZT;    MPB;    vector impedance spectroscopy;    electromechanical parameters.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

The compositions of lead lanthanum zirconate titanate PLZT [Pb(Zr_0.57Ti_0.43)O₃ + ð‘�? at% of La, where ð‘�? = 3, 5, 6, 10 and 12] have been synthesized using mixed oxide route. The temperature dependent electromechanical parameters have been determined using vector impedance spectroscopy (VIS). The charge constant ð‘�??₃₁ and elastic compliance $s^{E}_{11}$ show a peak in all the samples at a temperature ð‘�??_mt much below the ferroelectric â€�?? paraelectric transition temperature, whereas the series resonance frequency ð‘�??_s shows a dip at these temperatures. The Poisson’s ratio 𝜎^𝐸 increases with temperature ð‘�?? showing a broad peak at a temperature higher than ð‘�??_mt. The voltage constant ð‘�??₃₁ decreases and the planar coupling coefficient 𝐾_p remains constant up to half of the ð‘�??_mt and then falls sharply with ð‘�??. Half of the ð‘�??_mt can, therefore, be used for specifying the working temperature limit of the piezoceramics for the device applications.

【 授权许可】

Unknown