Ceramic insulation

Ceramic materials present a number of important advantages over other types of solid insulating materials, such as stability and high heat resistance. Certain disadvantages cannot be overlooked however, such as poor heat shock resistance, brittleness, or limitations in forming. It is quite obvious that the trend of ceramic insulation research in general leads toward the improvement of the less desirable properties, besides producing novel compositions. The year 1948 was no exception in this respect. There is also another trend noticeable, the combination of ceramic insulating materials with conducting elements in electrical circuits. This may be for the purpose of hermetic sealing of components or printing of circuits on ceramic surfaces. Increased activities along these lines are quite obvious by the number of patents obtained in 1948 on metal-ceramic seals.