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Transparent Lead Lanthanum Zirconate Titanate Ceramics Derived from Oxide Mixture Via a Repeated Annealing Process

Published online by Cambridge University Press:  31 January 2011

L. B. Kong ,
J. Ma ,
T. S. Zhang  and
R. F. Zhang
L. B. Kong
Affiliation:
School of Materials Engineering, Nanyang Technological University, Singapore 639798
J. Ma
Affiliation:
School of Materials Engineering, Nanyang Technological University, Singapore 639798
T. S. Zhang
Affiliation:
School of Materials Engineering, Nanyang Technological University, Singapore 639798
R. F. Zhang
Affiliation:
School of Materials Engineering, Nanyang Technological University, Singapore 639798
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Extract

Lead lanthanum zirconate titanate (PLZT9/65/35) ceramics were prepared from their oxide mixture via reactive sintering without involving a calcination step. PLZT ceramics sintered at 1000 °C for 4 h possessed a grain size of 3–4 μm, a dielectric constant of 3670, a dielectric loss of 0.033 at 1 kHz, and a remnant polarization of 5.7 μC/cm2 and coercive field of 4.6 kV/cm, respectively. Transparent PLZT ceramics were obtained by annealing the sintered samples at 1125 °C for 6 h repeatedly for 4 times without using hot pressing or oxygen flow. The grain size of PLZT ceramics increased to 4–6 μm, with dielectric constant of 5187 and dielectric loss (1 kHz) of 0.036, and remnant polarization of 11 μC/cm2 and coercive field of 5.3 kV/cm. The transparent PLZT ceramics demonstrated a transmittance of 42% at a wavelength of 550 nm.

Type
Rapid Communications
Information
Journal of Materials Research , Volume 17 , Issue 5 , May 2002 , pp. 929 - 932
Copyright
Copyright © Materials Research Society 2002

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