Dielectric and ferroelectric properties of tungsten bronze ferroelectrics in SrO-Pr2O3-TiO2-Nb2O5 system
- 1. Key Lab. of Nonferrous Materials and New Processing Technology, Ministry of Education, Guilin University of Technology, Guilin 541004 (China)
- 2. State Key Lab. of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070 (China)
Description
Two new tungsten bronze ferroelectrics Sr6-nPrnTinNb10-nO30 (n = 1, 2) were synthesized and characterized. Sr5PrTi3Nb7O30 and Sr4Pr2Ti4Nb6O30 had tetragonal filled tungsten bronze structure at room temperature, and exhibited weak ferroelectric nature with remnant polarizations (Pr) of 0.81 and 0.8 μC cm-2, respectively. Sr5PrTi3Nb7O30 showed diffused relaxor behavior with the Curie temperature Tc at around 70 deg. C (at 1 MHz), while Sr4Pr2Ti4Nb6O30 showed diffused normal ferroelectric transition with Tc at 182 deg. C. Their dense ceramics had dielectric constant of 550 and 325, and dielectric loss (tan δ) of 0.05 and 0.006 for Sr5PrTi3Nb7O30 and Sr4Pr2Ti4Nb6O30 at 1 MHz, respectively. Heterogeneous mixtures of the two compounds might be used to fabricate temperature-stable dielectrics.
Availability note (English)
Available from http://dx.doi.org/10.1016/j.matchemphys.2010.01.014Additional details
Identifiers
- DOI
- 10.1016/j.matchemphys.2010.01.014;
- PII
- S0254-0584(10)00021-0;
Publishing Information
- Journal Title
- Materials Chemistry and Physics
- Journal Volume
- 121
- Journal Issue
- 1-2
- Journal Page Range
- p. 114-117
- ISSN
- 0254-0584
- CODEN
- MCHPDR
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 44020117
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- CERAMICS; CURIE POINT; FERROELECTRIC MATERIALS; MHZ RANGE; MIXTURES; NIOBIUM OXIDES; PERMITTIVITY; PHASE TRANSFORMATIONS; POLARIZATION; PRASEODYMIUM OXIDES; RELAXATION LOSSES; STRONTIUM OXIDES; TETRAGONAL LATTICES; TITANIUM OXIDES; TUNGSTEN BRONZE
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; ALLOYS; CHALCOGENIDES; COPPER ALLOYS; COPPER BASE ALLOYS; CRYSTAL LATTICES; CRYSTAL STRUCTURE; DIELECTRIC MATERIALS; DIELECTRIC PROPERTIES; DISPERSIONS; ELECTRICAL PROPERTIES; ENERGY LOSSES; FREQUENCY RANGE; LOSSES; MATERIALS; NIOBIUM COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; PRASEODYMIUM COMPOUNDS; RARE EARTH COMPOUNDS; REFRACTORY METAL COMPOUNDS; STRONTIUM COMPOUNDS; THERMODYNAMIC PROPERTIES; TITANIUM COMPOUNDS; TRANSITION ELEMENT ALLOYS; TRANSITION ELEMENT COMPOUNDS; TRANSITION TEMPERATURE; TUNGSTEN ALLOYS
Optional Information
- Copyright
- Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.