| $Pb(Mg_{1/3}Nb_{2/3})O_3-PbTiO_3$ 계 완화형 강유전체의 특성에 미치는 $PbTiO_3$ 첨가량의 변화 -I.유전특성 및 초전특성- |
| 박재환, 흥국선, 박순자 |
| 서울대학교 무기재료공학과 |
| Effect of $PbTiO_3$ Concentration on the Properties of $Pb(Mg_{1/3}Nb_{2/3})O_3-PbTiO_3$ Relaxor Ferroelectrics |
|
|
|
|
|
|
|
| ABSTRACT |
|
In order to understand the electrostrictive behavior of Pb(Mg1/3Nb2/3)O3-PbTiO3(PMN-PT) solid solutions the dielectric constants and the electric-field-induced strains in (1-x)PMN-xPT (x=0.0-0.4) were investigated in the temperature range -5$0^{circ}C$-20$0^{circ}C$. Powder of (1-x)Pb(Mg2/3Nb2/3)O3-xPbTiO3 (x=0.0, 0.1, 0.2, 0.3, 0.35, and 0.4) were prepared from the oxide forms of Pb, Mg, Nb and Ti via a columbite precursor method As the amount of PbTiO3 increases the temperature of maximum dielectric constant(T$varepsilon$max) increases and the phase transition become less diffusive. The strain maximum occurs only when the diffuse phase transition occurs from rhombohedral to cubic or rhombohedral to tetragonal as in x=0.1-0.35 The strains monotonically decrease with temperature in the materials in which phase transition occurs from tetragonal to cubic as in x=0.4 |
| Key words:
$Pb(Mg_{1/3}Nb_{2/3})O_3-PbTiO_3$, Ekectruc-field-induced strain, Diffused phase transition, Relaxors, Electrostrictive |
|
PDF Links
Full text via DOI 
Download Citation 
