Patent ID: 6645424
Filing Date: 2003-11-11
Classification: C03B,C03C

Abstract:
A process of making a glass-ceramic composite comprising the steps of:a. providing powdered T, B2O3, Al, CaO, X and Y, where T, X and Y are different, T is selected from the group consisting of Ti, TiO2 and TiH2, X is selected from the group consisting of metal and metal oxide and Y is selected from the group consisting of metal and metal oxide; b. weighing the powders in the following mole ratio: 3TiO2, 3B2O3,10Al, &agr;CaO, &bgr;X and &ggr;Y if T is TiO2 and T, B2O3, 2Al, &agr;CaO, &bgr;X and &ggr;Y if T is selected from the group consisting of Ti and TiH2, where &agr;, &bgr; and &ggr; represent non-zero numbers; c. mixing the powders dry for adequate time in a ball mill; d. forming the mixed powders into a green pellet, uniaxially, to a density of about 60% theoretical; and e. igniting the pellet, whereby a reaction product having the formula 3TiB2-5Al2O3-&agr;CaO-&bgr;X-&ggr;Y is produced if T is TiO2 and a reaction product having the formula TiB2-Al2O3-&agr;CaO-&bgr;X-&ggr;Y is produced if T is selected from the group consisting of Ti and TiH2.