Process for producing membrane for capacitive vacuum measuring cell
First Claim
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1. A process for producing a membrane for a capacitive vacuum measuring cell that comprises the following steps:
- a. forming a membrane from a substantially pure Al2O3 slurry;
b. heating the membrane a first time in a furnace to sinter the membrane;
c. cooling the membrane following step b;
d. heating the membrane a second time to smooth the membrane; and
e. cooling the membrane following step d.
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Abstract
A ceramic membrane for a capacitive vacuum measuring cell includes a thin ceramic membrane with a thickness of <250 μm, in particular less than 120 μm. The membrane is produced from a ribbon-shaped green body of Al2O3, and is given high planarity by smoothing the membrane after sintering. The green body is sintered at a sintering temperature that is higher than the smoothing temperature applied following sintering.
28 Citations
11 Claims
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1. A process for producing a membrane for a capacitive vacuum measuring cell that comprises the following steps:
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a. forming a membrane from a substantially pure Al2O3 slurry;
b. heating the membrane a first time in a furnace to sinter the membrane;
c. cooling the membrane following step b;
d. heating the membrane a second time to smooth the membrane; and
e. cooling the membrane following step d. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A process for producing a plurality of membranes for capacitive vacuum measuring cells that comprises the following steps:
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a. forming membranes from a substantially pure Al2O3 slurry;
b. heating the membranes a first time in a furnace to sinter the membranes;
c. cooling the membranes following step b;
d. heating the membranes a second time to smooth the membranes; and
e. cooling the membranes following step d;
wherein the step of heating the membranes a second time includes the step of stacking a plurality of membranes between flat plates for the purpose of thermal treatment to achieve smoothing. - View Dependent Claims (11)
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Specification