Microwave (2.45 GHz)-assisted rapid sintering of SiO2-rich rice husk ash

Natt Makul, Dinesh Kumar Agrawal

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The as-received SiO2-rich material, rice husk ash (RHA), was ground to a specific surface area (Blaine) of 4800 cm2/g and then was rapidly sintered by 2.45 GHz microwave energy using a multi-mode system. The sintering temperatures were in a range of 800-1200 °C. The morphology, phase composition, microstructure and reactivity were investigated by SEM, XRD, and hydration heat evolution and strength index. Results show that the sintered ground RHAs (SgRHAs) contain SiO2-cristolbalite and α-SiO2 as major phases. The bulk density is up to 0.98 kg/l, and strength index at 28 days of the 800 °C microwave-sintered RHA paste are up by 30% when comparing to the as-received ground RHA (gRHA).

Original languageEnglish (US)
Pages (from-to)367-370
Number of pages4
JournalMaterials Letters
Volume64
Issue number3
DOIs
StatePublished - Feb 15 2010

Fingerprint

Ashes
rice
ashes
sintering
Sintering
Microwaves
microwaves
Ointments
Phase composition
Specific surface area
Hydration
hydration
reactivity
heat
microstructure
Microstructure
Scanning electron microscopy
scanning electron microscopy
Temperature

All Science Journal Classification (ASJC) codes

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

Cite this

Makul, Natt ; Agrawal, Dinesh Kumar. / Microwave (2.45 GHz)-assisted rapid sintering of SiO2-rich rice husk ash. In: Materials Letters. 2010 ; Vol. 64, No. 3. pp. 367-370.
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Microwave (2.45 GHz)-assisted rapid sintering of SiO2-rich rice husk ash. / Makul, Natt; Agrawal, Dinesh Kumar.

In: Materials Letters, Vol. 64, No. 3, 15.02.2010, p. 367-370.

Research output: Contribution to journalArticle

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