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Structural, morphological and electrical properties of heat treated CaHPO4 biomaterials

IMTIAZ U. KHAWAJA1,* , QURSHIA CHOUDHRY2, ASIF MAHMOOD3, ZAHEER ABAS GILANI4, SHAUKAT ALI SHAHID5, MUHAMMAD FAROOQ1

Affiliation

  1. Department of Physics and Astronomy, Hazara University Mansehra-21300, Pakistan
  2. Department of Chemistry, The Islamia University of Bahawalpur, Bahawalpur-63100, Pakistan
  3. College of Engineering, Department of Chemical Engineerig, King Saud University, Riyadh, Saudi Arabia
  4. Department of Physics, Balochistan University of Information Technology, Engineering and Management Sciences, Quetta-87300, Pakistan
  5. Department of Physics, University of Agriculture, Faisalabad 38040, Pakistan

Abstract

Di-calcium phosphate dihydrate triclinic CaHPO4.2H2O was heated at 750 oC and 450 oC to obtain the tetragonal β-Ca2P2O7 and grey-coloured tetragonal γ-Ca2P2O7 phase. The pellets of β-Ca2P2O7 γ-Ca2P2O7 were prepared and dried at 120 oC for 4 hours. The pellets having mean thickness of 2 mm were characterized by XRD, optical microscopy, FTIR, TGA, SEM, UV-visible spectroscopy and dc-electrical measurements. Before sintering micro-cracks were seen however these cracks were disappeared after sintering at 750 oC. XRD confirmed the single crystalline phase. UV-vis. Spectra showed absorption in UV-region. DC-electrical resistivity exhibited that β-Ca2P2O7 is more conducting as compared to γ-Ca2P2O7 phase..

Keywords

CaHPO4.2H2O, β-Ca2P2O7 phase, γ-Ca2P2O7 phase, DC-electrical resistivity, XRD, FTIR.

Citation

IMTIAZ U. KHAWAJA, QURSHIA CHOUDHRY, ASIF MAHMOOD, ZAHEER ABAS GILANI, SHAUKAT ALI SHAHID, MUHAMMAD FAROOQ, Structural, morphological and electrical properties of heat treated CaHPO4 biomaterials, Optoelectronics and Advanced Materials - Rapid Communications, 9, 9-10, September-October 2015, pp.1171-1175 (2015).

Submitted at: July 7, 2015

Accepted at: Sept. 9, 2015