Boron nitride insulating material
Patent
·
OSTI ID:6300580
High temperature BN-insulated heaters for use as fuel pin simulators in reactor thermal hydraulic test facility studies comprise a cylindrical housing and a concentric heating element disposed within the housing and spaced apart from the housing to define an annular region therebetween. The annular region contains BN for providing electrical resistance and thermal conductivity between the housing and the heating element. The fabrication method of this invention comprises the steps of cold pressing BN powder at a pressure of 20 to 80,000 psig and a dwell time of at least 0.1 to 3 seconds to provide hollow cylindrical preforms of suitable dimensions for insertion into the annular region, the BN powder having a tap density of about 0.6 to 1.1 g/cm/sup 3/ and an orientation ratio of at least about 100/3.5. The preforms are inserted into the annular region and crushed in place.
- Assignee:
- Dept. of Energy
- Patent Number(s):
- US 4106186
- OSTI ID:
- 6300580
- Country of Publication:
- United States
- Language:
- English
Similar Records
Boron nitride insulating material
Boron nitride insulating material
Electric heater for nuclear fuel rod simulators
Patent
·
Sat Dec 31 23:00:00 EST 1977
·
OSTI ID:863153
Boron nitride insulating material
Patent
·
Tue Nov 23 23:00:00 EST 1976
·
OSTI ID:5306788
Electric heater for nuclear fuel rod simulators
Patent
·
Thu Dec 31 23:00:00 EST 1981
·
OSTI ID:864185