General Electric Company

Current Lighting Solutions, LLC

Ge Medical Systems Global Technology Company, LLC

Robert Joseph Lyons

Anant Achyut Setlur

James Edward Murphy

Prasanth Kumar Nammalwar

Florencio Garcia

James Scott Vartuli

Ashfaqul Islam Chowdhury

Nagaveni Karkada

Venkat Subramaniam Venkataramani

Charles D Greskovich

William Winder Beers

Ljudmil Slavchev Grigorov

Martin Kin-Fei Lee

Anirudha Rajendra Deshpande

Fangming Du

Larry Neil Lewis

Don Mark Lipkin

Dale M Brown

Frederic Joseph Klug

Steven Jude Duclos

Dan Hancu

Richard Louis Hart

Wendy Wen-Ling Lin

Daniel George Norton

Dominic A Cusano

Donald Thomas McGrath

James Walter LeBlanc

Chang Wei

James Anthony Brewer

Hrishikesh Keshavan

Clifford Bueno

Mohandas Nayak

Elliott West Shanklin

Benjamin Hale Winkler

Theodore Robert Grossman

Haochuan Jiang

Oltea Puica Siclovan

Karthick Vilapakkam Gourishankar

Kevin Paul McEvoy

Stephen Francis Bancheri

August O Englert

Robert J Riedner

Satya Kishore Manepalli

Sergio Martins Loureiro

Ravikumar Hanumantha

Jaime Andres Echeverry

Venkat Subraman Venkataramani

Kevin Alan David

Steven Jude Ductos

Stephen Thomas Tedeschi

Robert John Cleaver

Charles F Marks

Anant Achyut Setlur Jr

A lighting apparatus includes a semiconductor light source in direct contact with a polymer composite comprising a color stable Mndoped phosphor, wherein the lighting apparatus has a color shift of ≤1.5 MacAdam ellipses after operating for at least 2,000 hour at a LED current density greater than 2 A/cm, a LED wall-plug efficiency greater than 40%, and a board temperature greater than 25° C.

Color stable red-emitting phosphors

A lighting apparatus includes a semiconductor light source in direct contact with a polymer composite comprising a color stable Mndoped phosphor, wherein the lighting apparatus has a color shift of &#x2264;1.5 MacAdam ellipses after operating for at least 2,000 hour at a LED current density greater than 2 A/cm, a LED wall-plug efficiency greater than 40%, and a board temperature greater than 25&#xb0; C.

A phosphor composition is derived from combining KSiF:Mnin solid form with a saturated solution of a manganese-free complex fluoride including a composition of formula I: A[MF], where A is selected from Na, K, Rb, and combinations thereof and M is selected from Al, Ga, In, Sc, Y, Gd, and combinations thereof. The composition of formula I: A[MF] has a water solubility lower than a water solubility of KSiF. A lighting apparatus including the phosphor composition is also provided.

Moisture-resistant phosphor compositions and associate methods

A process for synthesizing a color stable Mndoped phosphor includes contacting a precursor of formula I, in gaseous form at an elevated temperature with a fluorine-containing oxidizing agent to form the color stable Mndoped phosphorA[MF]:Mn&#x2003;&#x2003;Iwherein

A color stable Mn4+ doped phosphor of formula I,A[MF]:Mn&#x2003;&#x2003;I

A process for preparing a Mndoped phosphor of formula IA[MF]:Mn&#x2003;&#x2003;Iincludes contacting a mixture of a compound of formula A[MF], a compound of formula AX, and a Mnsource comprising a fluoromanganese compound, with a fluorine-containing oxidizing agent in gaseous form, at an elevated temperature, to form the Mndoped phosphor;wherein

Process for preparing red-emitting phosphors

A process for preparing a Mndoped phosphor of formula IA[MF]:Mn&#x2003;&#x2003; Iincludes combining in an acidic solution, an Acation, an anion of formula MF, and a Mnsource comprising a fluoromanganese compound, precipitating a Mncontaining phosphor precursor from the acidic solution, and contacting the Mncontaining phosphor precursor with a fluorine-containing oxidizing agent in gaseous form, at an elevated temperature, to form the Mndoped phosphor;wherein

A process for preparing a color stable Mndoped complex fluoride phosphor of formula I includesA(M, Mn)F&#x2003;&#x2003;(I)contacting a first aqueous HF solution comprising (1&#x2212;m) parts of a compound of formula HMF, and a second aqueous HF solution comprising m*n parts of a compound of formula A[MnF], with a third aqueous HF solution comprising (1&#x2212;n) parts of the compound of formula A[MnF] and a compound of formula AX, to yield a precipitate comprising the color stable Mndoped complex fluoride phosphor;

Processes for preparing color stable manganese-doped complex fluoride phosphors

Systems and methods for recovery of rare-earth constituents from environmental barrier coatings are provided. One method includes extracting rare-earth (RE) oxide constituents from a feedstock containing RE silicates and non-RE contaminants. The method includes leaching the REs from the feedstock into an acid to form an acid solution, performing an oxalate precipitation on the acid solution to form an RE oxalate hydrate, and separating the RE oxalate hydrate from the acid solution. The method also includes heat treating the RE oxalate hydrate to form an RE oxide containing the RE elements extracted from the feedstock.

Systems and methods for recovery of rare-earth constituents from environmental barrier coatings

A detector for detecting high-energy radiation is disclosed. The detector includes scintillating material with a garnet structure includes gadolinium, yttrium, cerium, gallium, and aluminum. The scintillating material is expressed as (GdYACe)(GaAlD)O:wFO, wherein A is lutetium, lanthanum, terbium, dysprosium, or a combination thereof; D is indium, scandium, or a combination thereof; F is a divalent ion; 0&#x2266;x&#x3c;0.2, 0&#x3c;y&#x3c;0.5, 0.001&#x3c;z&#x3c;0.05, 0&#x3c;u&#x3c;0.1, 0&#x2266;n&#x3c;0.2, 0.3&#x3c;m&#x3c;0.6, and 10 ppm&#x2266;w&#x2266;300 ppm; and y/x&#x3e;1.

Rare earth garnet scintillator and method of making same

A lighting apparatus capable of emitting white light includes a semiconductor light source; and a phosphor material radiationally coupled to the light source. The phosphor material includes a color-stable Mndoped phosphor prepared by a process including providing a phosphor of formula I;A[MF]:Mn&#x2003;&#x2003;Iand contacting the phosphor in particulate form with a saturated solution of a composition of formula II in aqueous hydrofluoric acid;A[MF];&#x2003;&#x2003;II

Color stable manganese-doped phosphors

The present invention details a process for producing a catalyst powder. The steps of the process include preparing catalyst slurry, drying, pyrolyzing, and calcining the catalyst slurry to obtain a calcined catalyst powder. The catalyst slurry comprises a catalyst, a liquid carrier, a templating agent, and a catalyst substrate. The catalyst slurry is dried to obtain a raw catalyst powder. The raw catalyst powder is heated in a first controlled atmosphere to obtain a pyrolyzed catalyst powder and the pyrolyzed catalyst powder is calcined in a second controlled atmosphere to obtain a calcined catalyst powder. A method of fabricating a catalyst surface and catalytic converter using the prepared catalyst powder is also illustrated.

Process for preparing catalyst powder

A phosphor of formula I is included in a phosphor composition in a lighting apparatus capable of emitting white light,CaSrCeMMAlSiO&#x2003;&#x2003;(I) The lighting apparatus includes a semiconductor light source in addition to the phosphor composition.

Kimzeyite garnet phosphors

Compositions comprising a phosphor and a compound having the formula RRM, wherein Ris a substituted or unsubstituted alkyl, aryl, heteroaryl, arylalkyl, heteroarylalkyl, alkoxy, alkoxyl, acyl heterocycle, haloalkyl, oxaalkyl, or silyl; Ris a sulfate, sulfonate, or carboxylate and M is an alkali metal or an alkaline earth metal are provided. Phosphors coated with the compound, methods of making the coated phosphors and articles comprising the compositions are provided.

Coated phosphors, methods of making them, and articles comprising the same

Growing community of inventors

Burnt Hills, NY, United States of America

Robert Joseph Lyons