Startseite Structural and relaxor characteristics of Ca0.18Sr0.226Ba0.594Nb2O6
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Structural and relaxor characteristics of Ca0.18Sr0.226Ba0.594Nb2O6

  • K. R. S. Preethi Meher , Rahul Vaish , J. Hou , Dalibor Krsmanovic , R. V. Kumar und K. B. R. Varma
Veröffentlicht/Copyright: 17. August 2013
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International Journal of Materials Research
Aus der Zeitschrift International Journal of Materials Research Band 104 Heft 2

Abstract

Polycrystalline Ca0.18Sr0.226Ba0.594Nb2O6 (CSBN18) was synthesized via the solid-state reaction route. X-ray structural studies confirmed it belonged to the tetragonal tungsten bronze family. Rietveld refinement of the X-ray data has been carried out for CSBN18 where the atomic positions and site occupancy factors for A-sites have been determined. The dielectric properties of CSBN18 ceramic were studied as a function of temperature in the 100 Hz–1 MHz frequency range. The dielectric relaxation followed the Vogel–Fulcher relation wherein Ea = 37.4 meV; Tf = 131.5 °C and ω0 = 4.31 × 109 rad s−1. A high pyroelectric coefficient of ∼ 250 μC m−2.K was obtained around the transition temperature (∼150 °C). This is significantly higher than that reported for polycrystalline SrxBa1-xNb2O6 (SBN). However, the piezoelectric coefficient (d33) of the title composition was as low as 6 pC N−1.

Keywords: Relaxor; Ferroelectric; Pyroelectric; Rietveld; Dielectric
* Correspondence address, Prof. K.B.R. Varma, Materials Research Center, Indian Institute of Science, Bangalore 560012., India, Tel.: 91-80-22932914, Fax: 91-80-23600683, E-mail:

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Received: 2011-8-26
Accepted: 2012-8-2
Published Online: 2013-08-17
Published in Print: 2013-02-15

© 2013, Carl Hanser Verlag, München

Artikel in diesem Heft

  1. Contents
  2. Contents
  3. Original Contributions
  4. Structure of composites consolidated from ball milled 7475 aluminum alloy and ZrO2 powders
  5. Isothermal section of the Al-Tb-V ternary system at 773 K
  6. Development of an atomic mobility database for disordered and ordered fcc phases in multicomponent Al alloys: focusing on binary systems
  7. Effect of additive and current density on microstructure and texture characteristics of copper electrodeposits
  8. Magnetic properties and microwave absorption properties of carbon fibers coated with FeCo alloy
  9. Effects of BN content on the structural and mechanical properties of a-SiBN ceramics
  10. Structural and relaxor characteristics of Ca0.18Sr0.226Ba0.594Nb2O6
  11. Study on the dielectric properties of CaCu3Ti4O12 ceramics using the one-dimensional Ising model
  12. Erosion wear performance of a surface diffusion alloyed coating on pure magnesium
  13. Evaluation of the quality of cladding deposited on continuous steel casting rolls
  14. Investigating the machinability of austempered ductile irons with dual matrix structures
  15. Simple preperation of CuO nanoparticles and submicron spheres via ultrasonic spray pyrolysis (USP)
  16. Fabrication of transparent Nd:YAG ceramic by vacuum sintering with CaF2 additive
  17. Synthesis and characterization of new Bi2FeNiO6 material using a citric acid assisted gel combustion technique
  18. Processing and characterization of up-converting Er3+ doped (Lu0.5Y0.5)2O3 nanophosphor
  19. People
  20. People
  21. DGM News
  22. DGM News
https://doi.org/10.3139/146.110852
Schlagwörter für diesen Artikel
Relaxor; Ferroelectric; Pyroelectric; Rietveld; Dielectric

Artikel in diesem Heft

  1. Contents
  2. Contents
  3. Original Contributions
  4. Structure of composites consolidated from ball milled 7475 aluminum alloy and ZrO2 powders
  5. Isothermal section of the Al-Tb-V ternary system at 773 K
  6. Development of an atomic mobility database for disordered and ordered fcc phases in multicomponent Al alloys: focusing on binary systems
  7. Effect of additive and current density on microstructure and texture characteristics of copper electrodeposits
  8. Magnetic properties and microwave absorption properties of carbon fibers coated with FeCo alloy
  9. Effects of BN content on the structural and mechanical properties of a-SiBN ceramics
  10. Structural and relaxor characteristics of Ca0.18Sr0.226Ba0.594Nb2O6
  11. Study on the dielectric properties of CaCu3Ti4O12 ceramics using the one-dimensional Ising model
  12. Erosion wear performance of a surface diffusion alloyed coating on pure magnesium
  13. Evaluation of the quality of cladding deposited on continuous steel casting rolls
  14. Investigating the machinability of austempered ductile irons with dual matrix structures
  15. Simple preperation of CuO nanoparticles and submicron spheres via ultrasonic spray pyrolysis (USP)
  16. Fabrication of transparent Nd:YAG ceramic by vacuum sintering with CaF2 additive
  17. Synthesis and characterization of new Bi2FeNiO6 material using a citric acid assisted gel combustion technique
  18. Processing and characterization of up-converting Er3+ doped (Lu0.5Y0.5)2O3 nanophosphor
  19. People
  20. People
  21. DGM News
  22. DGM News
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