X-Ray Diffraction and Zn K-Edge XANES Studies of Perovskite Ferroelectric PZT-PZN Powders Derived from Zn2Nb34O87 Precursor

作者：Amonpattaratkit Penphitcha; Klysubun Wantana; Ananta Supon^*

来源：Ferroelectrics, 2016, 492(1): 25-34.

DOI：10.1080/00150193.2015.1069914

• PZT
• Powders-solid state reaction
• Perovskites
• Calcination
• XANES

An approach to synthesize perovskite ferroelectric 0.9Pb(Zr0.44Ti0.56)O-3-0.1Pb(Zn0.33Nb0.67)O-3 or 0.9PZT-0.1PZN powders with a modified mixed-oxide synthetic route via a combination of the perovskite PZT phase stabilizer and the novel intermediate phase of Zn2Nb34O87 B-site has been developed. Phase formation, morphology, particle size, chemical composition and oxidation state of the products were investigated as a function of calcination temperatures. It has been found that the pyrochlore phase of Pb3Nb4O13 tends to form together with the perovskite phase of PZT-PZN, depending on calcination temperatures. It is seen that optimization of calcination condition can lead to a 100% yield of PZT-PZN in a tetragonal perovskite phase. The tetragonality factor, degree of agglomeration, crystallite size and average particle size tend to increase with the calcination temperatures. In addition, the synchrotron X-ray absorption near edge structure (XANES) analysis showed the oxidation state of Zn2+ atoms for all condition of 0.9PZT-0.1PZN powders.

• 出版日期2016-2-19