Kailash C Jain

US Patent:

6638405, Oct 28, 2003

Filed:

Sep 10, 2001

Appl. No.:

09/949591

Inventors:

Kailash C. Jain - Troy MI
Da Yu Wang - Troy MI
Eric J. Detwiler - Davison MI
Paul Kikuchi - Fenton MI

Assignee:

Delphi Technologies, Inc. - Troy MI

International Classification:

G01N 27407

US Classification:

204421, 204426, 204429

Abstract:

One embodiment of a method for producing a gas sensor, comprises: disposing said gas sensor in a basic agent solution comprising a basic agent comprises a hydroxide of a metal selected from the group consisting of Group IA of the Periodic Table of Elements; Group IIA of the Periodic Table of Elements, and combinations comprising at least one of the foregoing basic agents, wherein said gas sensor comprises an electrolyte disposed between and in ionic communication with a first electrode and a second electrode; and disposing said gas sensor in an acidic agent solution.

US Patent:

6682640, Jan 27, 2004

Filed:

Jun 13, 2002

Appl. No.:

10/170941

Inventors:

Kailash C. Jain - Troy MI
Eric Clyde - Bay City MI
Da Yu Wang - Troy MI
Paul Kikuchi - Fenton MI

Assignee:

Delphi Technologies, Inc. - Troy MI

International Classification:

G01N 27407

US Classification:

204429, 204421, 204427, 4271261, 4271263, 427331, 4273722, 4274191, 4274192, 4274193

Abstract:

Disclosed herein is a method for producing a gas sensor, comprising disposing a reference electrode on a side of an electrolyte, disposing a measuring electrode on a side of the electrolyte opposite the reference electrode, disposing a first protective coating on a side of the measuring electrode opposite the electrolyte, treating the sensor with an aqueous salt solution comprising chloride and carbonate salts comprising elements selected from the group consisting of Group IA and IIA elements of the Periodic Table to form a treated sensor comprising the chloride and the carbonate salt mixture, drying the treated sensor, and disposing a second protective coating on a side of the first protective coating opposite the measuring electrode.

US Patent:

6916384, Jul 12, 2005

Filed:

Oct 22, 2001

Appl. No.:

10/037900

Inventors:

Kailash C. Jain - Troy MI, US
Kenneth M. Rahmoeller - West Bloomfield MI, US
Da Yu Wang - Troy MI, US
Paul Kikuchi - Fenton MI, US
Carlos A. Valdes - Flint MI, US

Assignee:

Delphi Technologies, Inc. - Troy MI

International Classification:

B08B003/04
G01N027/407

US Classification:

134 28, 134 29, 204402, 204429

Abstract:

A method of treating a gas sensor comprising: disposing the gas sensor in a basic agent solution comprising a basic agent selected from the group consisting of Group IA of the Periodic Table of Elements, Group IIA of the Periodic Table of Elements, and combinations comprising at least one of the foregoing metals, wherein the gas sensor comprises an electrolyte disposed between and in ionic communication with a first electrode and a second electrode; disposing the gas sensor in an acidic agent solution; wetting at least a portion of a porous protective layer of the gas sensor with an alkaline-carbonate solution; and heating the gas sensor.

US Patent:

7244316, Jul 17, 2007

Filed:

May 15, 2003

Appl. No.:

10/439137

Inventors:

Kailash Jain - Troy MI, US
Kenneth Rahmoeller - West Bloomfield MI, US
Da Yu Wang - Troy MI, US
Eric Clyde - Bay City MI, US
Paul Kikuchi - Fenton MI, US

Assignee:

Delphi Technologies, Inc. - Troy MI

International Classification:

B08B 3/04
G01N 27/407

US Classification:

134 28, 134 29, 204402, 204429

Abstract:

A two-step chemical treatment method for chemically conditioning a sensor element comprising an electrolyte in ionic communication with a first electrode and a second electrode is described. The method comprises treating at least a portion of a sensor element with a first solution comprising an inorganic base, a carbonate salt and an acid salt; heating the sensor element; treating at least a portion of the sensor element with a second solution comprising an inorganic base and a carbonate salt; and drying the sensor element. The gas sensors comprising the two-step treated sensor elements have reduced lean shift, green effect, sensor output amplitude drop, and the light-off time is improved.

US Patent:

7964324, Jun 21, 2011

Filed:

Jun 1, 2009

Appl. No.:

12/475626

Inventors:

Su-Chee Simon Wang - Troy MI, US
Kailash Chandra Jain - Troy MI, US
Joseph M. Keller - Grand Blanc MI, US
Rick D. Kerr - Fenton MI, US

Assignee:

Delphi Technologies, Inc. - Troy MI

International Classification:

H01M 8/00
H01M 4/02
H01M 4/36
H01M 4/34

US Classification:

429535, 429523, 429400, 429219

Abstract:

A method for improving performance of an SOFC by impregnation of the cathode with metallic silver. A solution of AgNOin acetonitrile is imbibed into a perovskite cathode fabricated on a electrolyte layer supported by an anode, defining an SOFC cell. The cathode imbibition may be repeated a plurality of times as may be needed depending upon the thickness of the cathode. The amount of solution soaked into the cathode results a total final weight percent of Ag in the cathode between about 0. 5% and about 10%. The cathode is then fired in air at high temperature to drive off the acetonitrile and to reduce the silver ions to metallic silver. In this way, cathode electrical resistance may be reduced by as much as 52%.

US Patent:

8124037, Feb 28, 2012

Filed:

Dec 11, 2009

Appl. No.:

12/635756

Inventors:

Kailash C. Jain - Troy MI, US
Joseph M. Keller - Grand Blanc MI, US
Rick D. Kerr - Fenton MI, US

Assignee:

Delphi Technologies, Inc. - Troy MI

International Classification:

C04B 35/00

US Classification:

423263, 423 211

Abstract:

An improved LSCF 6428 perovskite material of the type LaSrCoFeO wherein x=0. 4, z=(0-0. 1), a=(0. 01-0. 04), and b=(0. 05-0. 15) for use as an SOFC cathode having increased electronic and ionic conductivity. The general formula is similar to the prior art formulae (LaSr)CoFeO and LaSrCoFeO but applies the z term to La and Sr independently as well as reducing the overall content of La. Further, by adding a small amount (a) of extra Co ions, catalytic activity, conductivity, and sinterability are further enhanced. Adding small amounts (b) of Fe and/or Fe and Co moderates the thermal expansion coefficient with no adverse effect on crystal structure or fuel cell performance. Improved sinterability, microstructure, and reduced film cracking result in high power density of fuel cells. An inherently low-cost solid state reaction method is described.

US Patent:

20030070921, Apr 17, 2003

Filed:

Oct 11, 2002

Appl. No.:

10/269442

Inventors:

Eric Clyde - Bay City MI, US
Kailash Jain - Troy MI, US
Paul Kikuchi - Fenton MI, US

International Classification:

C25B011/04
C25D003/38
G01N027/26
C22C005/04

US Classification:

204/291000, 204/421000, 205/292000, 420/466000

Abstract:

Disclosed herein are electrodes, sensors, and methods for making and using the same. In one embodiment, the sensor comprises: a co-fired sensing electrode comprising the reaction product of about 50 wt % to about 95 wt % noble metal, about 0.5 wt % to about 15.0 wt % yttria-stabilized zirconia, and about 1 wt % to about 6 wt % yttria, based upon a total combined weight of the noble metal, yttria-stabilized zirconia, and yttria, a reference electrode, and a co-fired electrolyte disposed between and in ionic communication with the co-fired sensing electrode and the reference electrode. In one embodiment, the method of making the sensor comprises: forming an ink comprising about 50 wt % to about 95 wt % metal component, about 0.5 wt % to about 15 wt % yttria-stabilized zirconia, about 1 wt % to about 6 wt % yttria, and solvent, wherein the weight percentages are based on a total weight of non-solubles the ink, applying the ink to at least a portion of a first side of an electrolyte to form an assembly, and co-firing the assembly to form the sensor.

US Patent:

20060213772, Sep 28, 2006

Filed:

Mar 22, 2005

Appl. No.:

11/086225

Inventors:

Kailash Jain - Troy MI, US
Carlos Valdes - Flint MI, US
Da Wang - Troy MI, US
David Wallace - Flint MI, US
Paul Kikuchi - Fenton MI, US
Raymond Bloink - Swartz Creek MI, US
Walter Symons - Grand Blanc MI, US

International Classification:

G01N 27/26

US Classification:

204431000

Abstract:

A gas sensing element and method of making are provided. The gas sensing element can comprise calcined inorganic oxides that sequester contaminants in an exhaust stream. The calcined inorganic oxides provide sensors with improved performance, thereby eliminating post-sinter chemical and/or electrical conditioning.