Mocrowave Foaming Of Sodium Silicate-Ortodibasic Calcium Phosphate Mixtures (In Spanish)

The effect of microwave application on the thermal behaviour, volume change, size and pore size distribution as well as chemical reactions and dissolution of sodium silicate/dibasic calcium phosphate ceramic (DCF) samples have been analysed. Ceramic foams with porosities between 71 and 79 wt% and pore sizes ranging from 10 to 200 microns have been obtained. After 90 seconds, the temperature of samples reach about 130 deg C with a weight loss of 23 wt%. Differences in the proportion of DCF in the initial mixture originate changes in volume and different chemical compounds in the final obtained foams. Additions of 10, 20 and 30 wt of DCF originates volume increases of 350, 300 and 250 % respectively.