コーディエライトセラミックスの生成反応過程と物理特性に及ぼすコランダム(α-Al_2O_3)およびギブサイト(Al(OH)_3)の影響 Effect of Corundum(α-Al_2O_3)and Gibbsite(Al(OH)_3)on Reaction Process and Physical Properties of Cordierite Ceramics
We studied the effect of a corundum and gibbsite on the reaction process andphysical properties of cordierite ceramics. The results were as follows:<BR>(1) In the fired bodies obtained from the kaolin-talc-gibbsite mixture, gibbsite attributed to the cordierite formation without rearrangement into corundum in the firing process.<BR>(2) In the case of small particle size of ground mixture, apparent porosity of bodies fired at 1200°C were 0% in both case of kaolin-talc-corundum mixture and kaolin-talc-gibbsite mixture.<BR>(3) The bending strength and thermal expansion coefficient of bodies fired at1300°C obtained from both mixtures increased with decrease in particle size ofground mixtures. The optimum particle size of kaolin-talc-gibbsite mixture wasabout 0.4μm, because over grinding mixture caused a decrease in cordieritecontent of body fired at 1300°C.
粉体および粉末冶金 46(3), 262-268, 1999-03-15
Japan Society of Powder and Powder Metallurgy