Improving the quality of chamotte made from Berlinsk clay

Conclusions The optimum firing temperature for Berlinsk clay to convert it into chamotte is 1300–1330°C. Above this temperature the chamotte bloats and has a low apparent density (below 2.10 g/cm³). The fireclay goods should be made from chamotte with an average or high apparent density (2.14–2.30 g/cm³).The articles made with the overtired chamotte have a high porosity and low apparent density. It is not recommended for use in firebrick production.Translated from Ogneupory, No. 2, pp. 14–16, February, 1981.