to y tzp is 12 the difference between the experimental weight loss after heating to 550 u00b0 c and the theoretical weight loss was due to residual carbon fig1 shows tga data obtained from the 15 1 precursor these data showed that for high salt to resin ratios the drying procedure described above did not lead to homogeneous precipitation for precursor taken from the top and middle of the beaker the weight loss profiles were significantly different as a remedial measure for this nonhomogeneous precipitation the entire contents of the beakers used to dry the swollen gel were milled in a high speed grinder for approximately one minute prior to the tga analysis fig1 shows tga data obtained from milled precursors with salt to resin ratios of 0 5 1 5 1 15 1 as well as a sample prepared without resin following milling of the dried precursors the tga data for all the samples were very reproducible fig1 shows that the temperature of formation for y tzp produced with the invention technique increased as the salt to resin ratio increased the temperature of formation for the 0 5 1 sample of 450 u00b0 c was consistent with the temperature of formation for sol gel synthesized y tzp this result indicated that at sufficiently low salt to resin ratios the gel network was quite effective in partitioning small amounts of solution.