Abstract
This work introduces novel method to prepare ecomaterials wollastonite (CaSiO 3 ) using the hydrothermal treatment technique of Rice hush ash (RHA), glass cullet and CaO at 180°C for 24 hour so as the Ca/Si molar ration of 1.0. The sample after hydrothermal treatment at 180°C for 24 hours is calcined at 1000°C to obtained wollastonite CaSiO 3 . The obtained wollastonite has many applications in biomaterials and thermal insulator. This research also aim to improve the quality of RHA, thus reduce negative impact to environment.
Highlights
Vietnam is an agriculture country, in which produce lot of rice and its by product is rice husk ash (RHA)
This process cause air pollution, attracted Vietnamese researcher to find alternative method to reduce the impact of rice husk ash to environment
The mixture of RHA, glass culled and CaO is mixing with the weight ratio of CaO: RHA: glass cullet is 1.43: 1.00: 1.00 so that the Ca/Si molar ratio of the mixture is 1.0 according to the chemical composition of wollastonite (CaSiO3)
Summary
Vietnam is an agriculture country, in which produce lot of rice and its by product is rice husk ash (RHA). The RHA is consider as waste of agriculture industry, and treated by burn in the open air. This process cause air pollution, attracted Vietnamese researcher to find alternative method to reduce the impact of rice husk ash to environment. The research group in Department of Ceramic Materials aim to reuse rice husk ash as source of Silica (SiO2). This research report new technology to mixing RHA with glass cullet and CaO with the Ca/Si molar ratio of 1.0, in order to synthesize Wollastonite (CaSiO3) as environmental materials. The advantage of our study is utilize the Vietnam RHA and reduce the
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