Effects of pore shape and porosity on the properties of porous PZT 95/5 ceramics |
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| Affiliation: | 1. School of Materials Science and Engineering, North University of China, Taiyuan 030051, China;2. State Key Lab of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;1. School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, PR China;2. Key Lab of Functional Materials For Electronic Information, MOE, Huazhong University of Science and Technology, Wuhan 430074, PR China;1. Condensed Matter Science and Technology Institute & School of Science, Harbin Institute of Technology, Harbin 150080, China;2. State Key Laboratory of New Ceramic and Fine Processing & School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;3. National Laboratory of Solid State Microstructures & Department of Materials Science and Engineering, Nanjing University, Nanjing 210093, China;4. Department of Materials Science and Engineering & Materials Research Institute, The Pennsylvania State University, University Park, PA 16802, USA;5. Department of Mathematics & Materials Research Institute, The Pennsylvania State University, University Park, PA 16802, USA |
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| Abstract: | Porous lead zirconate titanate (PZT 95/5) ferroelectric ceramics were prepared by sintering compacts consisting of PZT and pore formers. The piezoelectric, dielectric and ferroelectric properties of porous PZT ceramics were investigated as a function of pore shape and porosity. Piezoelectric coefficient (d33), dielectric constant (?33) and remnant polarization (Pr) decreased with an increase in porosity, and the porous PZT ceramics with spherical pores exhibited better properties than that with irregular pores. Furthermore, the electrical conductivities of PZT ceramics were investigated to explain the phenomena that porous PZT ceramics exhibited lower dielectric loss (tan δ) than dense PZT ceramics in the temperature range from 250 to 500 °C. |
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