Ceramic ChemistryCeramic chemistry is concerned chiefly with the reactions of silicates. It is complicated by the difference in conduct between body and glaze. In the latter, if properly matured, the chemical reaction between the constituents has proceeded to a finish, and the melt consists of a homogeneous mixture or solid solution of silicates and, it majj be, borates and phosphates, and any eutectics that may be formed. With the body, on the other hand, it is different. The firing is only conducted to incipient vitrification, if as high as that. The chemical reactions are not allowed to proceed to a finish. The chemistry of pottery is therefore, as far as the body is concerned, one of incomplete reactions. Consequently, the nature and condition of the raw materials are of im- are irrelevant portance in the body, while in the glaze they as long as the same ultimate composition is preserved. |
Contents
Clay | |
Clay Analysis | |
Raw Materials | |
Bodies | |
Glazes | |
Enamels | |
Firing of the Ware | |
Loss in Manufacture | |
Industrial Disease | |
Testing of Finished Ware | |
Classification of Pottery | |
Research | |
Bibliography in English | |
The Production of Colour | |
Index of Subjects | |
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Common terms and phrases
absorption alkalies alumina aluminium ammonium anorthite barium body borates borax boric acid bricks calcium calculated carbonate cent Ceramic chemical chemistry china clay chloride clear glaze colloids colour composition containing copper crazing cryolite crystallisation crystals decomposed decomposition drying earthenware enamel engobe equivalent estimated excess felspar filtered filtrate Finished Ware fired at cone flint fluorides flux fritted fused fusibility gives glass glaze granite green heat hydrated hydrofluoric acid ignition insoluble kaolin kaolinite kiln Langenbeck lime loss magnesia manganese manufacture Matt Glazes mechanical analysis melting point metal method micas minerals mixture molecular formula Na2O obtained opalescent orthoclase particles plastic clay plumbism porcelain potash pottery precipitate present Primary Rocks proximate analysis Purdy quartz raw materials refractory residue sand shrinkage silica SiO2 slag soda sodium soluble salts solution spar stains stoneware sulphate sulphuric surface factor temperature tested tin oxide titania titrated undercoat uranium vitrification white lead zinc