摘要:
Lightweight ceramics and their manufacture and additives used in the manufacturing process to induce porosity, reduce density and to lightweight the ceramic.
摘要:
The invention relates to tiles or slabs comprising a fired ceramic material which has a chemical composition with a particular combination of oxides; to a method for the manufacture of said tiles or slabs; and to the use thereof for construction or decoration applications.
摘要:
The invention relates to a method of manufacturing porous construction items, such as bricks, ceramic tiles, roof tiles, large-sized wall blocks, pavement items etc. The technical result of the invention is a reduction in energy consumption while preserving the physicochemical properties. The method of manufacturing porous construction items from natural clay raw material that is capable of swelling comprises the preparation of the raw material, moulding, two-stage heating with retention until swelling occurs, and stabilization. Moreover, the first heating stage takes place before the moulding and is carried out simultaneously with the transport of the raw material to the mould filling zone. The moulding takes place in a mould designed as a muffle furnace with a lid, and the second heating stage occurs at a temperature of no less than 1250°C for no less than 10 minutes. Stabilisation occurs in a tilted tunnel furnace, wherein the inside temperature at the entry is no less than 900°C with further cooling of the finished product at a rate of no more than 120 degrees/hour so that the items at the exit are cooled to no more than 30-40°C.
摘要:
Procédé de cuisson de produits céramiques dans un four tunnel en continu (1), comportant une entrée (3) des produits céramiques (2) avant cuisson, une sortie (4) des produits céramiques après cuisson, et une zone de feu (8) dans laquelle des brûleurs (9) alimentés en gaz (10) et en air extérieur assurent la cuisson des produits céramiques (2), un flux d'air parcourant le four de la sortie à l'entrée, à contre-courant des produits céramiques. L'air extérieur alimentant les brûleurs (9) est au moins partiellement remplacé par de l'air extrait du four (1) dans la zone de feu.
摘要:
The present invention relates to an article comprising Al 2 O 3 and at least one of REO or Y 2 O 3 , wherein at least 80 percent by weight of the glass or glass-ceramic collectively comprise the Al 2 O 3 and the at least one of REO or Y 2 O 3 , based on the total weight of the glass or glass-ceramic.