Electrodes for solid state gas sensor
First Claim
1. A mixed potential electrochemical sensor for the detection of gases comprising:
- a ceria-based electrolyte having a surface for exposing to the gases to be detected;
a reference wire electrode and a sensing wire electrode extending through the surface of the electrolyte and fixed within the electrolyte as the electrolyte is compressed and sintered.
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Accused Products
Abstract
A mixed potential electrochemical sensor for the detection of gases has a ceria-based electrolyte with a surface for exposing to the gases to be detected, and with a reference wire electrode and a sensing wire electrode extending through the surface and fixed within the electrolyte as the electrolyte is compressed and sintered. The electrochemical sensor is formed by placing a wire reference electrode and a wire sensing electrode in a die, where each electrode has a first compressed planar section and a second section depending from the first section with the second section of each electrode extending axially within the die. The die is filled with an oxide-electrolyte powder and the powder is pressed within the die with the wire electrodes. The wire-electrodes and the pressed oxide-electrolyte powder are sintered to form a ceramic electrolyte base with a reference wire electrode and a sensing wire electrode depending therefrom.
18 Citations
11 Claims
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1. A mixed potential electrochemical sensor for the detection of gases comprising:
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a ceria-based electrolyte having a surface for exposing to the gases to be detected;
a reference wire electrode and a sensing wire electrode extending through the surface of the electrolyte and fixed within the electrolyte as the electrolyte is compressed and sintered. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for fabricating a mixed potential electrochemical sensor for the detection of gases comprising:
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forming a wire reference electrode and a wire sensing electrode, each electrode having a first compressed planar section and a second section depending from the first section;
placing the wire electrodes in a die with the second section of each electrode extending axially within the die;
filling the die with an oxide-electrolyte powder;
pressing the powder with the wire electrodes;
removing excess oxide-electrolyte powder to expose the first compressed planar portion of the electrodes;
extending the first portion of the electrodes electrodes axially from the pressed oxide-electrolyte powder; and
sintering the wire-electrodes and the pressed oxide-electrolyte powder to form a ceramic electrolyte base with a reference wire electrode and a sensing wire electrode depending therefrom. - View Dependent Claims (8, 9, 10, 11)
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Specification