Effect of autoclaving and sintering on the formation of β-wollastonite

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

β-wollastonite (β-CaSiO3) was synthesized from rice husk ash and calcium carbonate, and a study of the effects of the autoclaving and sintering steps is presented here. Autoclaving and sintering at 8 h and 2 h yielded the β-wollastonite phase in full, with improved crystallinity. Nucleation between rice husk ash and calcium oxide occurred around 135 °C, pressure 0.24 MPa, and growth proved to be more crystalline after the ripening period. For shorter processing times, and for both unsintered and unautoclaved samples, cristobalite and unstable tricalcium silicate phases were present. Crystallite size was increased by longer sintering times but reduced by longer autoclaving times. The β-wollastonite obtained had a random branch-like structure. In conclusion, the introduction of the autoclaving step successfully obtained β-wollastonite from a reaction between rice husk ash and calcium oxide.

Original languageEnglish
Pages (from-to)1077-1081
Number of pages5
JournalMaterials Science and Engineering C
Volume58
DOIs
Publication statusPublished - 1 Jan 2016

Fingerprint

Ashes
autoclaving
sintering
rice
Sintering
ashes
Lime
calcium oxides
Calcium carbonate
Crystallite size
Silicates
oxides
Calcium Carbonate
calcium carbonates
Nucleation
Silicon Dioxide
Crystalline materials
silicates
crystallinity
carbonates

Keywords

  • Autoclaving
  • Calcium oxide
  • Rice husk ash
  • Sintering
  • β-wollastonite

ASJC Scopus subject areas

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

Cite this

Effect of autoclaving and sintering on the formation of β-wollastonite. / Ismail, Hamisah; Shamsudin, Roslinda; Abdul Hamid, Muhammad Azmi.

In: Materials Science and Engineering C, Vol. 58, 01.01.2016, p. 1077-1081.

Research output: Contribution to journalArticle

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