Open AccessCharacteristics of Solid State Sintered Silica Ceramic Derived from Rice Husk Ash
Author(s) -
I Nyoman Sudiana,
La Aba,
Lina Lestari,
H. Aripin,
Komang Gde Suastika,
Muhammad Zamrun Firihu,
S. Mitsudo
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/797/1/012033
Subject(s) - materials science , husk , ceramic , scanning electron microscope , sintering , microwave , gyrotron , grain growth , grain size , composite material , mineralogy , metallurgy , electron , chemistry , botany , physics , quantum mechanics , biology
Silica xerogel produced from rice husk ash (RHA) taken from South East Sulawesi Indonesia has been successfully sintered by using a microwave oven 2.45 GHz as well as a millimeter waves (MMW) heating system with a 28 GHz gyrotron. The samples were also heated by using an electric furnace where served as a comparison. Physical characterization of the samples before and after sintering were then investigated by using an Archimedes densification measurement method device, a X-ray diffraction (XRD) and a Scanning Electron Microscopy (SEM), respectively. Effect of microwave energy on the characteristics of silica ceramic after processing were analyzed and compared to conventionally sintered results. The effect of frequency to properties of the silica was also revealed and reported previously in separated paper. In this paper, depedency of microwave power and heating rate to grain growth and density of the ceramic are reported. The results suggested that the microwave power affect to grain growth rate of silica xerogel as well as to their density. In other hand, grain growth is also strongly depend on heating rate during fabrication.