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A description is given of the design of a pulse type hopper dispenser for feeding mixtures of fine powders, powders containing fiber inclusions, or powders of high moisture content. The essential feature of the operation of the dispenser is that the powder mixture is periodically disturbed by the carrier gas, which is directed by means of a closing device and a T-pipe into the powder-containing vessel of the dispenser.

A technology was developed for incorporating fibrous single crystal mullite into corundum products. Studies were made of the strength and thermal physical properties of the corundum reinforced with mullite fibers. Judging from the thermal-shock resistance and impact strength, corundum products with additions of fibrous single crystals of mullite are much better than corundum products without the additives.