Heat resisting materials and methods for their manufacture

Claim 1

AN ELECTRICLLY CONDUCTIVE MATERIAL ADAPTED FOR HIGH TEMPERATURES UNDER OXIDIZING CONDITIONS CONSISTING ESSENTIALLY OF AT LEAST 50% MOLYBDENUM DISILICIDE SINTERED FROM A POWDER THEREOF HAVING AN AVERAGE PARTICLE SIZE LESS THAN ABOUT 10 MICRONS WHILE INTERMIXED WITH AT LEAST ONE METAL OXIDE HAVING AT LEAST AN EQUALLY FINE PARTICLE SIZE OF THE GROUP CONSISTING OF SIO2, AL2O3 AND COMBINATIONS THEREOF, SAID OXIDE COMPONENT CONSTITUTING AT LEAST 1% AND UP TO 50% BY WEIGHT OF THE MATERIAL AND CONTAINING FROM 0 TO 34% OF ALUMINA BY WEIGHT OF SAID MIXTURE, SAID MATERIAL CONTAINING AT LEAST ABOUT 1% OF QUARTZ GLASS, SAID QUARTZ GLASS BEING DISTRIBUTED THROUGHOUT SAID MATERIAL, SAID SINTERING HAVING BEEN CARRIED OUT AT LEAST INITIALLY IN AN ATMOSPHERE SELECTED FROM THE GROUP CONSISTING OF THE NOBLE GASES, HYDROGEN AND SUCH GASES CONTAINING SMALL AMOUNTS OF AN OXYGEN-CONTAINING GAS, THE AMOUNT OF SAID COMPONENT AND SAID POWDER WITHOUT SUCH AS TO FACILITATE THE SINTERING OF THE POWDER WITHOUT RENDERING THE SINTERED POWDER ELECTRICALLY NON-CONDUCTIVE, SAID MATERIAL BEING RESISTANT TO PROLONGED TEMPERATURES IN THE RANGE 1500-1700*C. IN AIR AND HAVING A POROSITY NOT GREATER THAN 10%.