| abstract |
Method for producing a composite body (13, 130) having a layer structure, which is used at least as part of a crucible and / or a melting tank and / or a refining trough and / or a pipeline and / or a stirrer and / or a furnace for use in contact with a Melt of at least one metal, semi-metal, semiconductor and / or glass is formed, comprising the following steps: a) providing at least two sheets (1) of sintered quartz material (1), wherein at least one plate has an open porosity of more than 2.5%, the plates being made from a cast slip mass which is sintered, and wherein sintering at a sintering temperature at which part of the quartz glass is converted to beta-cristobalite, b) stacking the plates such that a major expansion surface of a plate faces a major expansion surface of the plate following the stack, c) connecting the stacked plates to a block (12, 120) using a sinterable mass (5) of quartz glass, d) performing a temperature treatment on the block (12, 120) at temperatures in the range of above 1000 ° C, so that at least one sintering of the sinterable mass (5) takes place and from the block (12, 120) a solid composite body (13 , 130) arises. |