A GLASS-TO-METAL JOINT FOR A SOLAR RECEIVER

摘要

The present invention provides a glass-to-metal sealing device (10) of a solar receiver and a method for producing it, the device (10) comprising a metal collar (11) and a glass cylinder (12) to be sealed together, in which the glass cylinder (12) is made out of a borosilicate glass having a thermal expansion coefficient in the range of [3.1,3.5] s10-6 °C-1 in the temperature range of [50,450]°C; the metal collar (11) is made of an austenitic alloy having a thermal expansion coefficient in the range of [3.5,6.0] s10-6 °C-1 in the temperature range of [50÷450]°C; the end portion of the metal collar (11) is beveled so as to increase its mechanical flexibility; and the end portion of the metal collar (11) is processed via a thermal treatment in order to establish a bond between the metal and the glass surfaces.