| 摘要 |
<p>The invention provides a process for producing a lightweight ceramic material for use in building purposes, particularly as a thermal and/or noise insulating material or as an aggregate for high temperature building materials, furnace building materials and/or refractory building materials, having a bulk density of 300 to 700 g/liter, which comprises forming a starting mixture containing 45 to 80 parts by weight of clay, 0 to 50 parts by weight of an aggregate, 15 to 30 parts by weight of water, 0,01 to 0,03 parts by weight of a deflocculant and 0,001 to 0,01 parts by weight of a surfactant; foaming the starting mixture at a pressure of 1 to 10 bar by compressed air at a temperature between ambient temperature and 95.degree.C to form a foam; molding and drying the foam to give a dried clay blank; and firing the dried clay blank at a product temperature between 600 and 1400.degree.C.</p> |
