- Enhancement in Piezoelectric Properties of PZT-Based Ceramics by High Energy Ball-Milling Treatment of Solid-State Synthesized Powders
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Dae-Uk Kim, Han-Bok Lee, Nguyen Viet Hung, Ky Nam Pham, Hyoung-Su Han, Jae-Shin Lee
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J Korean Powder Metall Inst. 2010;17(5):404-408.
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DOI: https://doi.org/10.4150/KPMI.2010.17.5.404
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- The effects of high energy ball-milling (HEBM) on the sintering behavior and piezoelectric properties of 0.1 wt% Li_2CO_3 doped 0.8Pb(Mg_1/3Nb_2/3)O_3-0.2Pb(Zr_0.475Ti_0.525)O_3 (PMN-PZT) ceramics were investigated. It was found that HEBM treatment was quite effective to reduce the average particle size down to 300 nm, leading to increased density as well as enhanced piezoelectric properties of a sintered specimen even though prolonged HEBM resulted in unwanted secondary phases that caused a degradation of piezoelectric properties. The dielectric constant (varepsilon_r), piezoelectric coupling factor (k_p) and piezoelectric constant d_33 of 0.1 wt% Li_2CO_3 doped PMN-PZT ceramics prepared via HEBM for 10 h reached 2040, 0.68 and 554 pC/N, respectively.
- MnO2 as an Effective Sintering Aid for Enhancing Piezoelectric Properties of (K,Na)NbO3 Ceramics
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Seong-Kyu Jeong, In-Ki Hong, Nam-Binh Do, Vu Diem Ngoc Tran, Seong-Youl Cho, Weon Pil Taib, Jae-Shin Lee
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J Korean Powder Metall Inst. 2010;17(5):399-403.
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DOI: https://doi.org/10.4150/KPMI.2010.17.5.399
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- The effects of MnO_2 doping on the crystal structure, ferroelectric, and piezoelectric properties of (K,Na)NbO_3 (KNN) ceramics have been investigated. MnO_2 was found to be effective in enhancing the densification and grain growth during sintering. X-ray diffraction analysis indicated that Mn ions substituted B-site Nb ions up to 2 mol%, however, further doping induced unwanted secondary phases. In comparison with undoped KNN ceramics, the well developed microstructure and the substitution to B-sites in 2 mol% Mn-doped KNN ceramics resulted in significant improvements in both piezoelectric coupling coefficient and electromechanical quality factor.
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Citations
Citations to this article as recorded by  - Further Enhancing Piezoelectric Properties by Adding MnO2 in AgSbO3‐Modified (Li,K,Na)(Nb,Ta)O3 Lead‐Free Piezoceramics
Qing Liu, Fang‐Yuan Zhu, Lei Zhao, Ke Wang, Longtu Li, Jing‐Feng Li, W. Jo
Journal of the American Ceramic Society.2016; 99(11): 3670. CrossRef
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