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Thermal Toughening of Low-Expansion Glass Ceramics

The maximum compressive stresses, CTmax developed in this way within a surface layer of a flat glass sheet can be calculated by (3.12) under the assumption that the heat transfer between the surface of the glass and the cooling medium will be oo, from [3.36]  [Pg.95]

Low-expansion glass ceramics, however, show an excellent thermal shock resistance and a high thermal load capacity. For that reason they are used as table and oven ware, oven plates, or fire resistant glasses. With all these applications, low-expansion glass ceramics are exposed to relatively high temperatures. In most of these cases, compressive stresses due to thermal toughening would be reduced. [Pg.96]

The low compressive stresses obtainable by thermal toughening and the reduction of prestressing in daily use are the reasons why low-expansion glass ceramics are usually not prestressed by thermal toughening. [Pg.96]

Low-expansion glass ceramics, however, show excellent thermal shock resistance and high thermal load capacity. For that reason they are used as table [Pg.108]

With glasses chemical strengthening can be performed by an exchange of ions for larger ions below Tg or smaller ions above Tg. [Pg.109]

Chemical Strengthening of Crystallized Glass Ceramics with Large Ions Below Tg [Pg.109]


See other pages where Thermal Toughening of Low-Expansion Glass Ceramics is mentioned: [Pg.95]    [Pg.107]   


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