| 摘要 |
The invention relates to a pressure measurement cell (1), comprising: a ceramic measurement membrane (2) and a ceramic counterpart (4), wherein the measurement membrane is joined to the counterpart in a pressure-tight manner forming a pressure chamber between the measurement membrane and the counterpart by means of an active brazing solder (6), wherein the pressure measurement cell (1) furthermore has a solder stop layer on a surface of the measurement membrane (2) and/or the counterpart (4), wherein the solder stop layer has a metal oxide or a reduced form of the metal oxide, wherein the metal oxide has at least one oxidation stage, which, assuming an activity coefficient of Rakt =1 at an inverse temperature of 8⋅10.4/K, has an oxygen coexistence decomposition pressure of not less than 10.23. bar and not more than 10-12. bar and which, assuming an activity coefficient of Rakt= 1, at an inverse temperature of 9.10-4/K has an oxygen coexistence decomposition pressure of not less than 10-27 bar and not more than 10-15 bar, suitable metal oxides are, for example, oxides of chromium, tungsten or titanium. |
