| 摘要 |
A ceramic evacuatable enclosure (10, 30, 42) such as a laser body is made by the following process. A first body portion (12, 41) is formed with a channel (18, 19, 20, 43, 45, 46) and second body portion (11, 31, 40) of the same ceramic material is provided. Mating surfaces are polished on the body portions (11, 12) for bonding together by thermocompression below the ceramic distortion temperature to achieve a vacuum seal. The ceramic may be alumina including 0.2 to 12% by weight of vitreous material. The thermocompression temperature may be in the range 120 DEG C to 1750 DEG C. Polishing is performed to a finish of from 0.01 mu m to 0.15 mu m. The body portions (11, 12) may have similar surface formations mutually aligned to provide a folded cavity (18, 19, 20) for an alumina waveguide CO2 laser.
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