US2018230012A1PendingUtilityA1
Method of producing spherical boron nitride fine particles
Est. expiryFeb 12, 2034(~7.5 yrs left)· nominal 20-yr term from priority
C01P 2004/62C01P 2006/80C01B 21/0646C01P 2004/64C01P 2004/03C01P 2004/04C01P 2004/32
57
PatentIndex Score
0
Cited by
0
References
0
Claims
Abstract
A method of producing a spherical boron nitride fine particle includes reacting ammonia with an alkoxide borate at an ammonia/alkoxide borate molar ratio of 1 to 10 in an inert gas stream at 750° C. or higher within 30 seconds, then applying heat treatment to a reaction product in an atmosphere of ammonia gas or a mixed gas of ammonia gas and an inert gas at 1,000 to 1,600° C. for at least 1 hour, and further firing the reaction product in an inert gas atmosphere at 1,800 to 2,200° C. for at least 0.5 hour.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1 . A method of producing a spherical boron nitride fine particle, characterized by reacting ammonia with an alkoxide borate at an ammonia/alkoxide borate molar ratio of 1 to 10 in an inert gas stream at 750° C. or higher within 30 seconds, then applying heat treatment to a reaction product in an atmosphere of ammonia gas or a mixed gas of ammonia gas and an inert gas at 1,000 to 1,600° C. for at least 1 hour, and further firing the reaction product in an inert gas atmosphere at 1,800 to 2,200° C. for at least 0.5 hour.Join the waitlist — get patent alerts
Track US2018230012A1 — get alerts on status changes and closely related new filings.
We store only your email — no account needed. See our privacy policy.