Low temperature processing of sol-gel derived PLZT thin film

Hirano, Tomio; Kawai, H.; Suzuki, Hisao; Kasahara, Shoji; Wada, Toshiki

doi:10.1080/00150199908014533

Cited by 4 publications

(1 citation statement)

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“…A rapid crystallization rate will reduce the diffusivity of mass transport, thus leading to a poor densification and porous structure of sintered bodies. This may be the reason why a very porous structure was found in the samples annealed at a temperature >600°C (e.g., 700°C) as 700°C is well above the crystallization temperature of PLZT (i.e., ∼500°–600°C) 18,27 . In addition, we also found that at 600°C, an extended annealing time (e.g., >30 min) was harmful for the densification of our films and led to the formation of cracks, as shown in Fig.…”

Section: Resultsmentioning

confidence: 70%

Densification of the PLZT Films Derived from Polymer‐Modified Solution by Tailoring Annealing Conditions

Zhang

2007

Journal of the American Ceramic Society

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The Pb0.91La0.09(Zr0.65,Ti0.35)0.9775O3 films were prepared from the solution containing polyvinylpyrrolidone, with Mw of 360 000. A fast heating rate of 40°C/min was used to heat our samples to temperatures in the range of 550°–750°C for different durations. Both a rapid heating rate and isothermal holding at a proper temperature are found to be essential for obtaining dense and crack‐free PLZT films. The TG‐DTA and Fourier‐transform infrared results indicated that the fast heating rate could keep a certain amount of polyvinylpyrrolidone residues undecomposed to a higher temperature (<700°C), which was found to be beneficial for the densification of the films during subsequent isothermal hold. The possible mechanisms responsible for the enhanced densification have been discussed. In addition, the effects of annealing temperature on the electrical and optical properties were also investigated.

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Section: Resultsmentioning

confidence: 70%