Plastic and nonmetallic article shaping or treating: processes – Including step of generating heat by friction
Patent
1978-06-28
1979-10-02
Vertiz, O. R.
Plastic and nonmetallic article shaping or treating: processes
Including step of generating heat by friction
106 734, 264 66, 264209, C04B 3564, C04B 3510, F27B 904
Patent
active
041698754
ABSTRACT:
Increased optical transmission is provided for a body of light transmissive polycrystalline alumina having relatively uniform size equiaxed grains of alumina and which is essentially free of porosity and secondary phase material. A tube of the improved optical material can be used as the light transmissive envelope for high intensity discharge lamps especially sodium and other metal vapor lamps exhibiting increased light output as a result of said improved optical transmission. A method of producing the improved optical material is also disclosed.
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Grimm Nelson
Laska Harry M.
Bell Mark
General Electric Company
Kempton Lawrence R.
McDevitt John F.
Neuhauser Frank L.
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