Softener 및 Hardener 동시 첨가가 PZT 압전세라믹에 미치는 영향 (Effects of Softener and Hardener Co-doping on Properties of PZT Piezoelectric Ceramics)

서지정보

· 발행기관 : 한국해양공학회
· 수록지 정보 : 한국해양공학회지 / 24권 / 6호 / 81 ~ 85페이지
· 저자명 : 이언종, 김윤해, 이병우

초록

The effects of co-doping with complex dopants of softeners, La+3 and/or Nb+5, and a hardener, Fe+3, on the microstructural and piezoelectric properties of PZT ceramics with a composition of a rhombohedral-tetragonal morphotropic phase boundary, PbZr0.53Ti0.47O3, were investigated. Unlike single-element doping, the complex doping of both the softener and hardener ions led to various compensation effects for the piezoelectric properties of the PZT ceramics. For 0.5wt.% La2O3 softener and/or 0.5wt.% Nb2O5 doped compositions, there were apparent hardener doping (compensation) effects for an addition of over 1.0wt.% Fe2O3. For the La2O3 and/or Nb2O5 doped composition, the co-dopant Fe2O3 addition led to lower kp and er, and increased Qm values. The prepared PZT ceramics modified with complex soft dopants, La+3 and Nb+, as well as a hard dopant, Fe+3, showed that the piezoelectric properties were stable with the compositional variations, which made it possible to establish piezoelectric performances with higher reliability and reproducibility. The most improved piezoelectric properties of enhanced Qm with er remaining higher kp, were obtained in the PZT composition complexly doped with La+3 and Fe+3. From the results obtained in this study, the properties of compositionally modified PZT ceramics can also be tailored over a wider range by changing the dopant compositions to meet the specific requirements for underwater or other applications.

영어초록

The effects of co-doping with complex dopants of softeners, La+3 and/or Nb+5, and a hardener, Fe+3, on the microstructural and piezoelectric properties of PZT ceramics with a composition of a rhombohedral-tetragonal morphotropic phase boundary, PbZr0.53Ti0.47O3, were investigated. Unlike single-element doping, the complex doping of both the softener and hardener ions led to various compensation effects for the piezoelectric properties of the PZT ceramics. For 0.5wt.% La2O3 softener and/or 0.5wt.% Nb2O5 doped compositions, there were apparent hardener doping (compensation) effects for an addition of over 1.0wt.% Fe2O3. For the La2O3 and/or Nb2O5 doped composition, the co-dopant Fe2O3 addition led to lower kp and er, and increased Qm values. The prepared PZT ceramics modified with complex soft dopants, La+3 and Nb+, as well as a hard dopant, Fe+3, showed that the piezoelectric properties were stable with the compositional variations, which made it possible to establish piezoelectric performances with higher reliability and reproducibility. The most improved piezoelectric properties of enhanced Qm with er remaining higher kp, were obtained in the PZT composition complexly doped with La+3 and Fe+3. From the results obtained in this study, the properties of compositionally modified PZT ceramics can also be tailored over a wider range by changing the dopant compositions to meet the specific requirements for underwater or other applications.

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