CONTINUOUS PUSHER-TYPE FURNACING SYSTEM FOR THE PRODUCTION OF HIGH-QUALITY UNIFORM BORON NITRIDE

摘要

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°.