| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for bending a radiation shielding glass which has a heavy metal oxide content of at least 50% by weight. <P>SOLUTION: First, a mold is provided, a glass plate comprising a radiation shielding glass is then provided, the mold is preheated to a temperature of 300 to 400°C, the glass plate is placed on the mold, the glass plate and the mold are heated in a furnace of the mold to a temperature of 370 to 430°C, then heated together to a temperature of 400 to 500°C, preferably, to a temperature of 440 to 500°C, at least for 30 minutes, preferably at least for 60 minutes in total heating time, the glass plate is then molded and finally the molded glass is cooled by means of a cooling program over a period of at least 60 minutes. For thermal prestressing, the glass body is supported at least at its outer periphery at a number of support points, heated to 400 to 500°C, and cold air is blown thereon. <P>COPYRIGHT: (C)2011,JPO&INPIT |
