2025-12-30
Within the Kovar family, 4J29 is the standard and recommended material for brazing high-alumina ceramics, providing a good balance of performance, cost, and dependability. 4J33/34 is a performance improvement for particular applications that require greater operating temperatures or rigorous nonmagnetic characteristics. The brazing of Kovar with alumina ceramics, which is supported by their thermal expansion matching, has become the industry standard for hermetic packaging of high-reliability electronic and optoelectronic components.
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