A factorial design approach for pressureless sintering in air of (Pb,La)(Zr,Ti)O-3 synthesized via coprecipitation of oxide-alkoxides

作者：Gunawidjaja Ray; Myint Thandar; Eilers Hergen^*

来源：Ceramics International, 2012, 38(1): 775-786.

DOI：10.1016/j.ceramint.2011.08.004

• Sintering
• Piezoelectric properties
• Impedance
• Optical properties
• PLZT

Using factorial design for guidance, (Pb,La)(Zr,Ti)O-3 (PLZT) ceramics of compositions 9.5/65/35 and 5/Z/T (Z/T = 60/40, 54/46,40/60) were pressureless sintered in air. Theoretical bulk densities of up to 96% were achieved. The starting materials were obtained from the coprecipitation of the oxide-alkoxides. The relevant sintering parameters were initially screened with the 9.5/65/35 composition using a factorial design method to achieve high-density, high purity perovskite-phase, and small grain-size. The variables were ball-milling time, cold-press pressure, sintering time, sintering temperature, vacuum treatment, and PLZT to PbZrO3 weight ratio. The optimized sintering conditions were then applied to the remaining PLZT compositions, as well as to a commercially purchased PLZT powder, PLZT 8/40/60 to yield similar ceramic qualities. The ceramic samples were characterized with SEM, XRD, and Raman spectroscopy, and their relative permittivity, Er, and the piezoelectric constant, d(33), were measured.

• 出版日期2012-1