锆钛酸铅材料的Sol-Gel工艺合成及其电性能研究

A Study on Preparation and Properties of Lead-Zirconate-Titanate by Sol-Gel Technique

以丁醇钛、乙醇锆、醋酸铅为原料,采用Sol-Gel工艺,成功地制备出锆钛酸铅陶瓷材料。本文主要对成胶规律、陶瓷材料的电性能进行了研究。结果表明:用该方法制备的陶瓷样品具有优良的介电和压电性能。

Ferroelectric Lead-Zirconate-Titanate material was successfully prepared from butoide, zirconium ectoxide and anhydrous lead acetate by Sol-Gel method. Sol-Gel process was described in detail, and the effect of water content, solvent and catalyst on gelatinous rules and electrical properties were investigated through experiments. The results showed that: the dielectric contant of PZT manifested maximum (about 4500) near morphotropism phase interface (Zr/Ti=51/49); the gelatinous rate increased obviously under the condition of H_2O/Ti(OC_4H_9)_4=2(mole ratio), (V_(c_3H_8o)+V_(CH_3OH)/V_((Ti)_(OC_4H_9)_4)=1. 5; the catalyst of HAc manifested suppression function to Sol-Gel process; noncrystalline of PZT gelatinous powder turned into crystalline at one step through solid chemical reac tion taking place in the range from 450℃ to 650℃. The analysis by means of differential thermal analysis(DTA) and X-ray diffraction (XRD) proved that the synthesis tempera. ture by Sol-Gel method was about 300℃ lower than that by traditional process; the Curie temperature of the sample made by Sol-Gel method was at about 350℃, which was 20℃ lower than that by traditional process. This performance implied that the improvement of dielectric properties might be due to the reduction of power size.