| you are: Properties of pottery
Porosity of a ceramic crock (at porous products) usually makes 10-40%, it increases at introduction in ceramic weight burning out, penoobrazujushchih and other additives. Aspiring to lower volume weight and heat conductivity, resort to creation of emptiness in a brick and ceramic stones. играй для девочек
Water absorption characterises porosity of a ceramic crock. Porous pottery has water absorption of 6-20% on weight, i.e. 12-14% on volume. At dense products water absorption much less: 1-5% on weight (2-10% on volume). Офисная мебель бюро-66. Натуральная детская мебель.
Heat conductivity of absolutely dense ceramic crock big-1,16 Vt (m - В°. An air time and the emptiness created in pottery, reduce volume weight and considerably reduce heat conductivity. The simplification stenovyh pottery with 1800 to 700 РєРіРј3 lowers heat conductivity with 0,8 to 0,21 Vt (m - В°). The thickness of an external wall and materialoemkost protecting designs Accordingly decreases.
Durability of ceramic materials depends on phase structure of a ceramic crock and porosity. Mark stenovogo pottery (a brick, etc.) on durability designates strength at compression (in РєРіСЃСЃРј2), however at an establishment of mark of a brick along with durability at compression consider a durability indicator at a bend as the brick in a laying is exposed to a bend. Products with a porous crock are issued Рњ75-300, and dense products (a road brick, etc.) - higher marks-400-1000. Between durability of ceramic crock Rcm and its factor of density jpl dependence is traced.
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