Formation of Forsterite Using Rice Husk Ash for High Frequency Insulation

Silicon-Based Materials from Rice Husks and Their Applications

“…In addition to the materials mentioned above, some other silicon-based materials made from RHs have also been reported, including cordierite, , magnesium silicide, ,, silanes, , potassium silicate, sodium silicate, ,, forsterite, , Si−O−C fibers, , sodium silicofluoride, sialon, , and gehlenite …”

Synthesis of High-Quality Forsterite

“…Forsterite ceramics have been used as electronic parts such as resistor core, electron tube stem, and dielectric resonator supports, because they have low dielectric constant and high insulation resistance even in the microwave frequency range. 13) Many kinds of fabrication conditions such as the type of sintering aide added, purity, grain size, chemical form, and calcining and firing temperatures using different raw materials have been investigated [14][15][16][17] to obtain forsterite with high Qf .…”

Nature and reactivity of silica available in rice husk and its ashes

“…Compared to the conventional sources of silica, rice husk ash as a ceramic raw material possesses advantages like fine particle size and higher reactivity due to its amorphous nature. Though heap burnt ash (Misra and Borthakur 1985) and ash made by controlled burning (Chakrabarti et al 1985) are used equally well in making the high alite cements and forsterite ceramics for high frequency insulation, respectively, the reactivity of the ash varies with the ashing conditions and pre-ashing treatment of the hulls (Borthakur et al 1980). The present study which describes the gradual changes in rice husk during ashing is undertaken to find out: (i) whether rice husk ashes from different places are the same and (ii) how the reactivity of the ash changes with ashing conditions.…”