Investigation of the influence of thermal treatment on the morphologies, dielectric and ferroelectric properties of PZT-based ceramics

• المؤلفون الرئيسيون: Vittayakorn N., Rujijanagul G., Cann D.P.
• التنسيق: مقال
• اللغة: English
• منشور في: 2014
• الوصول للمادة أونلاين: http://www.scopus.com/inward/record.url?eid=2-s2.0-34249745701&partnerID=40&md5=ad383db016ab2a72cf008d2b4eab305d; http://cmuir.cmu.ac.th/handle/6653943832/5210
• المؤسسة: Chiang Mai University

Pb[(Zr1/2Ti1/2)0.9(Zn1/3Nb2/3)0.1]O3 (PZT-10PZN) powder was prepared using the columbite precursor method. The phase development of calcined powder precursors was analyzed by X-ray diffraction. Dielectric and ferroelectric properties of the as-sintered and annealed samples were measured and correlated with the microstructure. The morphological evolution was determined by scanning electron microscopy (SEM). The as-sintered ceramic exhibited weak normal-ferroelectric behavior, with a relatively low dielectric constant maximum measured at 1 kHz (εrmax at 1 kHz) of 13,000. Annealing resulted in a transition to relaxor-ferroelectric-like behavior, a shift in the dielectric maximum temperature from 360 to 350 °C, and a dramatic increase in εrmax at 1 kHz to a maximum value of 35,000 for the longer anneal. Furthermore, after thermal annealing at 900 °C for 1 week the composition shifted close to the MPB with a great reduction in the transition temperature and a broadening of the dielectric constant maximum. A strong enhancement of the remanent polarization (Pr) was also observed. © 2006 Elsevier B.V. All rights reserved.