Sintering studies of synthesised manganeseoxide- doped calcium phosphate via wet chemical precipitation method

A. Norakmal, S. Ramesh, C. Y. Tan, Andanastuti Muchtar, B. K. Yap, R. Tolouei

Research output: Contribution to journalArticle

Abstract

The beneficial effects of incorporating small amounts of manganese oxide, MnO2 (005, 01, 03, 05 and 10 wt%) into biphasic calcium phosphate in promoting sintering and its effect on physical and mechanical properties of the dense sample sintered at 1000-1400°C were investigated. In this work, a wet precipitation method was employed to prepare biphasic calcium phosphate powder. The starting materials of calcium hydroxide and orthophosphoric acid were used in the titration process and the as-synthesised powder was subsequently doped with manganese oxide by wet milling. The X-ray diffraction analysis revealed that the phase present in the as-synthesised powder was predominantly hydroxyapatite. However, upon sintering, all the samples revealed the existence of biphasic calcium phosphate i.e. a mix phase comprising of hydroxyapatite and tricalcium phosphate. The highest relative density of 995% was obtained for biphasic calcium phosphate doped with 03 wt% MnO2 when sintered at 1400°C. The results also revealed that 03 wt% MnO2-doped biphasic calcium phosphate gave a maximum Vickers hardness of 514 GPa. On the other hand, 10 wt% MnO2-doped biphasic calcium phosphate exhibited highest fracture toughness of 132 MPa m1/2 as compared to 088 MPa m1/2 for undoped biphasic calcium phosphate when sintered at 1200°C.

Original languageEnglish
Pages (from-to)S6-147-S6-150
JournalMaterials Research Innovations
Volume18
DOIs
Publication statusPublished - 18 Dec 2014

Fingerprint

calcium phosphates
Calcium phosphate
sintering
Sintering
Powders
Manganese oxide
manganese oxides
Durapatite
Hydroxyapatite
Orthophosphoric acid
Calcium Hydroxide
Hydrated lime
Vickers hardness
calcium phosphate
hydroxyapatite-beta tricalcium phosphate
fracture strength
Titration
titration
X ray diffraction analysis
hydroxides

Keywords

  • Biphasic calcium phosphate
  • Manganese oxide
  • Sintering
  • Sintering additives

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Sintering studies of synthesised manganeseoxide- doped calcium phosphate via wet chemical precipitation method. / Norakmal, A.; Ramesh, S.; Tan, C. Y.; Muchtar, Andanastuti; K. Yap, B.; Tolouei, R.

In: Materials Research Innovations, Vol. 18, 18.12.2014, p. S6-147-S6-150.

Research output: Contribution to journalArticle

Norakmal, A. ; Ramesh, S. ; Tan, C. Y. ; Muchtar, Andanastuti ; K. Yap, B. ; Tolouei, R. / Sintering studies of synthesised manganeseoxide- doped calcium phosphate via wet chemical precipitation method. In: Materials Research Innovations. 2014 ; Vol. 18. pp. S6-147-S6-150.
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