Phase transition of Fe and Nb-substitued Pb(Mg1/2W1/2)O-3 ceramics
- Authors
- Kim, J.H.; Choo, W.K.; Koh, K.S.
- Issue Date
- Apr-2003
- Publisher
- KOREAN PHYSICAL SOC
- Keywords
- Pb(Fe1/2Nb1/2)O-3; Pb(Mg1/2W1/2)O-3; perovskite solid solution; antiferroelectrics
- Citation
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.42, no.SUPPL., pp S1266 - S1269
- Journal Title
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY
- Volume
- 42
- Number
- SUPPL.
- Start Page
- S1266
- End Page
- S1269
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/65723
- ISSN
- 0374-4884
1976-8524
- Abstract
- The crystal structure and dielectric properties of (I-x)Pb(Mg1/2W1/2)O-3-xPb(Fe1/2Nb1/2)O-3 (PMW1-xPFNx)(0.0 less than or equal to x less than or equal to 0.26) solid solution have been studied by X-Ray diffraction and dielectric property measurements. On increasing PFN substitutions up to x = 0.14, the crystal structure changes from the cubic to the orthorhombic through a sharp phase transition of the paraelectric (P E)-antiferroelectric (AFE) type that is independent of applied frequency. However, on further increasing PFN substitution (0.16 less than or equal to x less than or equal to 0.26), the dielectric constant curve as a function of temperature becomes gradually broader and the apparent transition becomes frequency-dependent while the low temperature phase crystal structure changes from the orthorhombic to the pseudocubic.
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