Glass Ceramic Composite Encapsulation Material

Glass ceramic from the las system is a mechanically strong material and can sustain repeated and quick temperature changes up to 800 1000 c.

Glass ceramic composite encapsulation material. Keeping in view of the significant improvement in case of glass glass ceramic composite materials compared to pure glass or glass ceramic 6 7 8 9 10 11 12 13 we reported the synthesis. In the encapsulation of insert materials within glass and glass ceramic articles not only must the bonding characteristics between the insert and the glass or glass ceramic materials be considered but also the relative coefficient of thermal expansions between the insert and the encapsulating materials must be programmed in order to avoid undue stresses in the article or the insert which. Needle like nanometre sized fluoroapatite crystals are precipitated in the glassy matrix in this glass ceramic. The dominant crystalline phase of the las glass ceramics hq s s has a strong negative coefficient of thermal expansion cte keatite solid solution as still a negative cte but much higher than hq s s.

The sem micrograph in fig. Fluoroapatite containing glass ceramic is the preferred material to fuse to lithium disilicate glass ceramics and to high toughness sintered zro 2 ceramics. Properties of glass ceramics glass ceramics can range from highly crystalline to containing a more substantial glassy phase. Glass ceramic composite materials offer manufacturers an opportunity to produce glass to metal hermetic seals using traditional sealing methods while possessing the strength and durability of ceramics.