Piezoelectric and mechanical properties of CaO reinforced porous PZT ceramics with one-dimensional pore channels. Issue 2 (1st February 2017)

• Record Type: Journal Article
• Authors: Liu, Wei; Liu, Wenting; Wang, Yanzhong; Xue, Chaorui; Wang, Jianhong; Yang, Jinlong
• Is Part Of: Ceramics international. Volume 43:Issue 2(2017)
• Page Start: 2063
• Page End: 2068
• Publication Date: 2017-02-01
• Subjects: 3-1 Type -- Porous PZT ceramics -- Doping -- Piezoelectric properties -- Mechanical properties; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.10.181
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The formation of capillaries in sodium alginate gels is a dissipative process driven by unidirectional diffusion of divalent cations into sodium alginate sols. In the present work, we have prepared 3-1 type porous lead zirconate titanate (PZT) ceramics with oxides (CaO) being doped on a molecular level from the dissipative process by incorporating PZT particles into the sodium alginate gel matrix. By varying the concentration of cation solutions (CaCl2 ) from 0.5 mol/L to 2.5 mol/L, both the microstructure, doping amount of oxides (CaO) and crystalline phase of the porous PZT ceramics were tailored. Accordingly, increase in the concentration of Ca 2+ has led to a reduction in the relative permittivity ( ε r ) first, and then an increase, while the piezoelectric coefficient ( d 33 and d 31 ) demonstrated an opposite variation tendency. The prepared samples possessed a maximal HFOM value of 4755×10 –15 Pa −1 when the concentration of Ca 2+ was 1.0 mol/L. Addition of CaO was found to improve the compressive strength of porous PZT ceramics, which was preferential to promoting the stability and reliability for application.