Light source incorporating a high temperature ceramic composite and gas phase for selective emission
AssigneeGeneral Electric Company
InventorsTimothy John Sommerer, Peter Joel Meschter, Vikas Midha, William Paul Minnear, David Jeffrey Bryan
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Abstract
A light source includes a base, a light-transmissive envelope coupled to the base, a composition disposed within the light-transmissive envelope, and a gas phase contained by the envelope for suppressing vaporization of the composition at operating temperatures greater than about 2000 Kelvin. The composition includes a first region and a second region and operable to suppress or reflect photons having a wavelength greater than about 700 nm and to emit or transmit photons having a wavelength between about 400 nm and about 700 nm.
Claims8
An article comprising:
- a substrate;
- and
- a high temperature coating coated on the substrate, wherein the high temperature coating comprises a ceramic matrix with a gas phase voids embedded within the ceramic matrix such that the coating is operable to reflect photons having a wavelength greater than about 700 nm and to emit or transmit photons having a wavelength between about 400 nm and about 700 nm arranged in a structure such that the ceramic matrix and gas phase voids maintain a periodicity of distribution between about 100 nm and about 1000 nm, wherein the ceramic matrix material comprises HfO2 and the gas phase comprises O2.
A light source comprising:
- a base;
- a light-transmissive envelope coupled to the base;
- a substrate coupled to the base;
- a high temperature coating coated on the substrate, wherein the high temperature coating comprises a ceramic matrix with a gas phase voids embedded within the ceramic matrix such that the coating is operable to reflect photons having a wavelength greater than about 700 nm and to emit or transmit photons having a wavelength between about 400 nm and about 700 nm arranged in a structure such that the ceramic matrix and gas phase voids maintain a periodicity of distribution between about 100 nm and about 1000 nm, wherein the ceramic matrix material comprises HfO2 and the gas phase comprises O2.
Dependencies are inferred from the claim text.