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Near Zero-Thermal Expansion Glass Ceramics
We are developing a new near-zero thermal-expansion (NZTE) glass
ceramics with superior thermal shock resistance. The materials are
inorganic, non-porous glass ceramic, characterized by crystalline phase
evenly distributed within residual glass phase. The glass phase has a
positive thermal expansion, while the crystalline phase has negative
thermal expansion, which balances the PTE of the glass phase to give a
resultant NZTE. The samples of glass ceramics are as shown in Figure
1. Figure 2 shows the thermal expansion of three glass ceramics.
Depending on the composition, the materials can show positive,
near-zero or negative thermal expansion at a wide temperature range
up to 600°C, as indicated in Table 1.
We are developing a new near-zero thermal-expansion (NZTE) glass
ceramics with superior thermal shock resistance. The materials are
inorganic, non-porous glass ceramic, characterized by crystalline phase
evenly distributed within residual glass phase. The glass phase has a
positive thermal expansion, while the crystalline phase has negative
thermal expansion, which balances the PTE of the glass phase to give a
resultant NZTE. The samples of glass ceramics are as shown in Figure
1. Figure 2 shows the thermal expansion of three glass ceramics.
Depending on the composition, the materials can show positive,
near-zero or negative thermal expansion at a wide temperature range
up to 600°C, as indicated in Table 1.
Figure 1. Samples of glass ceramics
Figure 2. Thermal expansion of glass ceramics
| of glass ceramics (20-600°C) |
R & D
Infrared Glasses