P. Piluso et al., REACTION AND DENSIFICATION OF MULLITE AND ALUMINUM TITANATE CERAMICS HEAT-TREATED IN A 2.45 GHZ MICROWAVE FURNACE, Annales de chimie, 18(5-6), 1993, pp. 353-360
Reaction and densification during reaction sintering of mullite (3Al2O
3.2SiO2) and aluminium titanate (beta-Al2TiO5) ceramics were studied u
sing either a conventional, 3 kW electric furnace or a 1.2 kW, 2.45 GH
z microwave furnace. Two tests were developed to calibrate temperature
measurement in the microwave furnace. An analysis map of samples trea
ted by microwaves showed that they had been subjected to thermal gradi
ents during their reaction-sintering stage. The decrease in sintering
temperature associated with the use of microwave, if any, does not exc
eed 50-degrees-C.