Polarisation behaviour of calcium phosphate based ceramics

J P Gittings, Christopher R Bowen, Irene G Turner, Frances R Baxter, Julian B Chaudhuri

Research output: Chapter in Book/Report/Conference proceedingChapter

17 Citations (Scopus)

Abstract

This paper studies the effects of porosity, sintering atmosphere and composition on the polarisation behaviour of calcium phosphate (CaP) ceramics. Hydroxyapatite (HA) and atricalcium phosphate (α-TCP) materials were prepared as both dense discs and as porous samples with interconnecting porosity. Materials were sintered in either air or water vapour at 13000C and poled at a variety of temperatures, applied electric fields and time periods to optimise the polarisation properties of the materials. Thermally Stimulated Depolarisation Current (TSDC) measurements were used to investigate the degree of polarisation of the HA and a-TCP ceramics. A high depolarisation current was observed for both the porous HA and α-TCP ceramics. Sintering in water vapour also increased the depolarisation current due to reduced dehydration reactions, which result in a greater concentration of hydroxyl ions.
Original languageEnglish
Title of host publicationAdvanced Materials Forum IV: Materiais 2007
EditorsA Torres Marques, A F Silva, A P M Baptista, C Sá, F J L Alves, L F Malheiros, M Vieira
Place of PublicationZurich
PublisherTrans Tech Publications
Pages91-95
Number of pages5
ISBN (Print)978-0-87849-373-9
Publication statusPublished - 2008
EventAdvanced Materials Forum IV - Selected, peer reviewed papers from the 4th International Materials Symposium Materiais 2007 and 8th Encontro da Sociedade Portuguesa de Materiais - SPM - Porto, Portugal
Duration: 1 Apr 20074 Apr 2007

Conference

ConferenceAdvanced Materials Forum IV - Selected, peer reviewed papers from the 4th International Materials Symposium Materiais 2007 and 8th Encontro da Sociedade Portuguesa de Materiais - SPM
CountryPortugal
CityPorto
Period1/04/074/04/07

Fingerprint

ceramics
polarization
calcium
phosphate
water vapor
porosity
dehydration
electric field
ion
atmosphere
air
material
temperature
sintering
effect

Keywords

  • Dehydration reactions
  • Polarisation behaviours
  • Sintering atmospheres
  • Hydroxyl ions
  • Porous samples
  • Degree of polarisation
  • Concentration of
  • Water vapours
  • Applied electric fields
  • Time periods
  • Depolarisation
  • Polarisation

Cite this

Gittings, J. P., Bowen, C. R., Turner, I. G., Baxter, F. R., & Chaudhuri, J. B. (2008). Polarisation behaviour of calcium phosphate based ceramics. In A. T. Marques, A. F. Silva, A. P. M. Baptista, C. Sá, F. J. L. Alves, L. F. Malheiros, & M. Vieira (Eds.), Advanced Materials Forum IV: Materiais 2007 (pp. 91-95). Zurich: Trans Tech Publications.

Polarisation behaviour of calcium phosphate based ceramics. / Gittings, J P; Bowen, Christopher R; Turner, Irene G; Baxter, Frances R; Chaudhuri, Julian B.

Advanced Materials Forum IV: Materiais 2007. ed. / A Torres Marques; A F Silva; A P M Baptista; C Sá; F J L Alves; L F Malheiros; M Vieira. Zurich : Trans Tech Publications, 2008. p. 91-95.

Research output: Chapter in Book/Report/Conference proceedingChapter

Gittings, JP, Bowen, CR, Turner, IG, Baxter, FR & Chaudhuri, JB 2008, Polarisation behaviour of calcium phosphate based ceramics. in AT Marques, AF Silva, APM Baptista, C Sá, FJL Alves, LF Malheiros & M Vieira (eds), Advanced Materials Forum IV: Materiais 2007. Trans Tech Publications, Zurich, pp. 91-95, Advanced Materials Forum IV - Selected, peer reviewed papers from the 4th International Materials Symposium Materiais 2007 and 8th Encontro da Sociedade Portuguesa de Materiais - SPM, Porto, Portugal, 1/04/07.
Gittings JP, Bowen CR, Turner IG, Baxter FR, Chaudhuri JB. Polarisation behaviour of calcium phosphate based ceramics. In Marques AT, Silva AF, Baptista APM, Sá C, Alves FJL, Malheiros LF, Vieira M, editors, Advanced Materials Forum IV: Materiais 2007. Zurich: Trans Tech Publications. 2008. p. 91-95
Gittings, J P ; Bowen, Christopher R ; Turner, Irene G ; Baxter, Frances R ; Chaudhuri, Julian B. / Polarisation behaviour of calcium phosphate based ceramics. Advanced Materials Forum IV: Materiais 2007. editor / A Torres Marques ; A F Silva ; A P M Baptista ; C Sá ; F J L Alves ; L F Malheiros ; M Vieira. Zurich : Trans Tech Publications, 2008. pp. 91-95
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