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US 10,119,932 B2Granted
Electrochemical gas sensor
AssigneeHoneywell International Inc.
InventorsLing Liu, Yan Zhang, Qian Zheng
Life of this patent
Estimating the term…
Abstract
A gas detector includes an electrochemical gas sensor. The sensor includes a plurality of electrodes. At least one of the electrodes is formed of a catalyst/binder slurry which is halftone printed onto a substrate. The composite printed element and substrate are sintered to form the electrode.
Claims5
A method comprising:
- heating a slurry prior to halftone printing the slurry;
- providing the slurry comprising at least a catalyst and a binder;
- halftone printing the slurry in a selected shape onto a porous substrate;
- sintering the printed shape and associated substrate;
- and
- incorporating the sintered shape and the associated substrate as an electrode into an electrochemical sensor;
- wherein a composition of the slurry comprises 75% weight Platinum black, 10% weight graphite and 15% weight perfluorinated ion electrolyte solution;
- wherein a response time for the electrochemical sensor comprising the composition is between 24 and 47 seconds for 20.9% oxygen in air.
5 more elements
A method comprising:
- heating a slurry prior to halftone printing the slurry;
- providing the slurry comprising at least a catalyst and a binder;
- halftone printing the slurry in a selected shape onto a porous substrate;
- sintering the printed shape and associated substrate;
- and
- incorporating the sintered shape and the associated substrate as an electrode into an electrochemical sensor;
- wherein the slurry further comprises a diluent comprising glycol;
- wherein a response time for the electrochemical sensor is between 231 and 254 seconds for nitrogen.
5 more elements
Dependencies are inferred from the claim text.