Abstract: A process for recycling boron nitride paint or powder is provided. Boron nitride paint or powder is removed in an acid wash to form a wash solution. A caustic is added to the wash solution to form a neutralized wash solution. The neutralized wash solution is filtered to collect a boron nitride cake. The boron nitride cake is then washed and formed into boron nitride paint or powder.

Abstract: A process for continuously manufacturing boron nitride utilizing a graphite capsule/vessel container for the reaction mixture and a pusher-type of high-temperature furnace. The process comprises the steps of: a) during the preheat step: pushing the graphite capsule/vessel through hot zones such that the reacting mixture is heated uniformly throughout its cross-sectional area and is held at or below 1000° C.: b) during the ultra-high-temperature heating step: pushing the graphite capsule/vessel through hot zones such that the reacting mixture is heated uniformly throughout its cross-sectional area and is held in the range of 1600 to 2200° C.

Abstract: A carbon material is formed by heat-treating a carbonaceous material in a reaction mix of oxides of boron and boron nitride in a nitrogen atmosphere to temperatures of 1600 to 2000° C. The surface of the carbonaceous material is transformed into a carbon material that is resistant to oxidation to temperatures of 900° C., enabling machined components to be utilized for weeks at that temperature. The carbon material is also stable in inert or vacuum environments to temperatures in the range of 1500 to 2000° C., enabling its use as aluminum evaporative boats and the like.

Abstract: A graphite capsule/vessel for producing boron nitride. The vessel has a cross-sectional area that allows reaction contents to be uniformly heated in order to yield boron nitride in a uniform consistency of crystallinity and purity and allows the reaction gaseous products to readily evolve.

Abstract: A carbon material is formed by heat-treating a carbonaceous material in a reaction mix of boron oxide or its precursors and ammonia-generating phases such as melamine or its like in a nitrogen atmosphere to temperatures of 1600 to 2000° C. The surface of the carbonaceous material is transformed into a carbon material that is resistant to oxidation to temperatures of 900° C., enabling machined components to be utilized for weeks at that temperature. The carbon material also is stable in inert or vacuum environments to temperatures in the range of 1500 to 2000° C., enabling its use as aluminum evaporative boats and the like.