Metalizing techniques and thermal conductivity of high purity beryllia ceramic-to-metal seals

Several important observations have developed during this study. They may be summarized as follows: 1. Good seal strengths can be obtained with high purity beryllia ceramics. 2. Presence of silica someplace in the system, i.e., either in the ceramic or in the metalizing mix, tends to contribute to good seal strength. 3. Varying the manganese-silica ratio by a magnitude of 3 does not seem to affect seal strength. 4. Seal strength is related to temperature, with lower temperatures producing the best results. 5. Effect of the mixes cited in this study on thermal conductivity are uncertain, but void-free, high thermal conductivity seals can be obtained with the mixes cited.