Method for producing discontinuous silicon carbide fibers, useful as heating elements in a low-energy microwave field, from discontinuous carbonized cott on fibers employing an admixture of carbonized cotton fibers, a metal salt promoter, calcium oxalate monohydrate, and low-density silicon dioxide. The admixture, in a dry state, is introduced into a preheated oven at about 1450 to 1750 degrees C for between about one and five hours. Silicon carbide fibe rs and a sheet formed from the fibers are disclosed.
