In these materials, the relict surfaces of glass grains (frit) serve as
nucleating sites for the crystal phases, and the glass composition
and processing conditions are chosen such that the glass softens
before sintering and undergoes viscous sintering to full density
just before the crystallization process is completed. Given these
conditions, the final crystalline microstructuremay be essentially
the same as that produced from the bulk process. Devitrifying
frits are commonly used for high-temperature-compatible coatings
and joining materials, such as seals for solid oxide fuel
cells,4,5 or as low thermal expansion materials for joining silica
glass components in the manufacture of lightweight telescope
mirrors
In these materials, the relict surfaces of glass grains (frit) serve as
nucleating sites for the crystal phases, and the glass composition
and processing conditions are chosen such that the glass softens
before sintering and undergoes viscous sintering to full density
just before the crystallization process is completed. Given these
conditions, the final crystalline microstructuremay be essentially
the same as that produced from the bulk process. Devitrifying
frits are commonly used for high-temperature-compatible coatings
and joining materials, such as seals for solid oxide fuel
cells,4,5 or as low thermal expansion materials for joining silica
glass components in the manufacture of lightweight telescope
mirrors
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