Process for producing boron nitride

Patent · Tue Jun 07 04:00:00 EDT 1988

OSTI ID:6910262

Parrish, L N; Chase, C C

A process for producing boron nitride is described which comprises mixing boron oxide, orthoboric acid and melamine to form a reaction composition which comprises from about 45 to about 50 weight percent, based on the weight of the reaction composition, of melamine and from about 50 to about 55 weight percent, based on the weight of the reaction composition, of a combination of boron oxide and orthoboric acid. The weight ratio of boron oxide to orthoboric acid is from about 3:1 to about 4:1; and heating the composition to temperature of about 700/sup 0/C to about 1200/sup 0/C under a non-oxidizing atmosphere to form boron nitride.

• Assignee: Union Carbide Corp., Danbury, CT
• Patent Number(s): US 4749556
• OSTI ID: 6910262
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ACIDIFICATION
AMINES
AZINES
BORIC ACID
BORON COMPOUNDS
BORON NITRIDES
BORON OXIDES
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTION YIELD
HEATING
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MELAMINE
NITRIDES
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PNICTIDES
SYNTHESIS
TRIAZINES
VERY HIGH TEMPERATURE
YIELDS