Sharma, S and Khan, Md Soaib and Ranjan, Rajeev and Choudhary, R N P (2015) Energy material Sm3+-modified lead zirconate titanate (PZT) ceramics : preparation, characterisation and application. Journal of Metallurgy and Materials Science, 57(3) . pp. 151-155.
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Polycrystalline Lead zirconate titanate (PZT) ceramics is an excellent dielectric, piezoelectric and ferroelectric material that exhibits interesting electrical and electromechanical properties and has tremendous device applications in the form of sensor, actuator and transducer. With specific requirements, its physical properties can be modified with compositional fluctuations, suitable substitutions and proper physical conditions. The samples of Sm3+-modified Lead zirconate titanate [PSZT; Pb Sm (Zr Ti ) O ; x = 0.00, 0.03, 0.06 and 0.09] ceramics have been prepared by 1.x x 0.60 0.40 1.x/4 3 the high temperature solid-state reaction technique. Preliminary structural analysis using X-ray diffraction technique confirms the formation of compounds in single phase tetragonal crystal system. Dielectric properties of the materials were analyzed within wide ranges of frequencies (1kHz-1MHz) and temperatures (300C - 5000C). Dielectric constant (e) of the materials are found to decrease with increase in frequency but exhibit ran increasing trend with increase in temperature exhibiting ferroelectric-paraelectric phase transition at well above the room temperature. The tangent loss (Tand) of the materials is found to be very low and its value remains low upto very high temperature close to the transition temperature. The temperature-frequency dependence of acconductivity (s) of the materials exhibits the presence of different type of charge ac species. It is observed that oxygen vacancy plays an important role for high temperature conduction mechanism and dynamics of polarization of the system. The piezoelectric coefficient (d ) of the poled PSZT samples is found to be very high that enables the 33 materials highly suitable for sensing and transducing purposes in research and industries.
|Uncontrolled Keywords:||PSZT, XRD, Dielectric constant, Tangent loss, AC conductivity, Piezoelectric coefficient.|
|Divisions:||Material Science and Technology|
|Deposited By:||Sahu A K|
|Deposited On:||26 Feb 2016 17:35|
|Last Modified:||26 Feb 2016 17:35|
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