الفهرس 
CHAPTER(1): INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
The production of sintered porous mullite bodies from local and imported raw materials was the aim of the present study. Bodies based on the stoichiometric composition of mullite mineral, were prepared from different sources of alumina, silica, with and without the addition of a pore forming agent. Also, making use of the composition of local diatomite made of carbonate and silica together with the addition of silica fumes were utilized to prepare porous wollastonite bodies by gel casting. The effect of addition of pore forming agent (saw dust) as well as replacing saw dust ( 10 % w/w) by fine graphite, were studied.
The local raw materials namely; rice husk from the agriculture waste was first treated by boiling in hot water, dried and burned up to 500 ºC. The resulted active white silica was characterized by XRF to throw light on its chemical constituents. Aluminum hydroxide powder was heat treated at two different temperatures.