Fabrication and electric properties of PZN-based ceramics using modified columbite method

• Published in: Journal of the European Ceramic Society Vol. 25; no. 12; pp. 2197 - 2200
• Main Authors: Li, Chen-Liang, Chou, Chen-Chia, Tsai, Dah-Shyang
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Oxford Elsevier Ltd 2005; Elsevier
• Subjects: Applied sciences; Building materials. Ceramics. Glasses; Ceramic industries; Chemical industry and chemicals; Dielectric properties; Electron microscopy; Electrotechnical and electronic ceramics; Exact sciences and technology; Ferroelectric; Perovskite; Sintering; Technical ceramics; Ferroelectric; Perovskite; Electron microscopy; Dielectric properties; Sintering; Lead oxide; Electrical properties; Niobates; Experimental study; Dispersive spectrometry; X ray diffraction; Oxide ceramics; Transmission electron microscopy; Ferroelectric materials; Niobium oxide; Zinc oxide; Manufacturing; Niobium Lead Zinc Oxides Mixed; Electroceramics
• ISSN: 0955-2219; 1873-619X
• DOI: 10.1016/j.jeurceramsoc.2005.03.029

Complex Pb(Zn 1/3Nb 2/3)O 3 (PZN)-based ceramics have been prepared by three different columbite methods: conventional columbite (CC), B-site precursor columbite (BSPC) and A-site sequential mixing columbite (ASMC) method. The pyrochlore was not removed completely by IC and BSPC process for PZN-rich compositions. The transmission electron microscopy (TEM) and energy dispersive spectroscopy (EDS) observation of the BSPC samples show that the BaO was segregated at triple junctions, implying that stabilization of the perovskite structure of the specimens was not completely achieved due to element segregation. On the other hand, full perovskite phase could be obtained by ASMC method for all compositions. Although the pyrochlore phase could mostly be removed by all three processes for specimens with PZN contents less than 50%, the dielectric behavior of PZN-based ceramics was markedly affected by the processing procedures.