Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Optical fiber – waveguide – or preform
Patent
1989-04-07
1990-11-06
Lowe, James
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Optical fiber, waveguide, or preform
264 63, 264 66, B29D 1100
Patent
active
049684590
ABSTRACT:
A method for the production of shaped bodies of transparent polycrystalline alumina having a yellowish color tone. A green body is formed using pure, fine-grained alumina. The auxiliary agents are burned out of the green body. The green body is treated in such a way as to produce a closed surface on the shaped body. The body is compacted to a transparent, polycrystalline alumina body. Finally, the body is annealed in air to impart a yellowish color tone to the body.
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Dentaurum J.P. Winkelstroeter KG
Fiorilla Christopher A.
Lowe James
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