화학공학소재연구정보센터
Korean Journal of Materials Research, Vol.15, No.6, 413-418, June, 2005
Pb(Ni 1/3 Nb 2/3 )O 3 -PZT 세라믹스 고용체에서 과잉 NiO첨가에 따른 압전특성 변화
The Effect of NiO Addition to the PNN-PZT Piezoelectric Ceramics on Piezoelectric Properties
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Perovskite Pb(Ni 1/3 Nb 2/3 )O 3 ?Pb(Zr,Ti)O 3 [PNN?PZT] ceramics were synthesized by conventional ceramic processing technique. In order to modify piezoelectric properties for sensor application in this system, NiO addition was considered to provide Ni +2 as an acceptor, which was known to occupy with B site in the structure. The effect of NiO addition up to 8mol% on the following piezoelectric properties as well as sintering properties was investigated. When NiO added more than 1mol% , average grain size was decreased and second phase was found to form. Moreover, the second phase caused decrease in relative dielectric constant (ε 33 T/ε0) , electro-mechanical coupling factor (k p ) , and piezoelectric charge constant (d 33 ) , while increasing mechanical quality factor (Q m ) . When 1mol% NiO was added, density, dielectric properties and piezoelectric properties were abruptly increased.
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