US 6,280,656 B1 · Phosphor and method for the fabrication thereof

Abstract

A phosphor includes about 99 dry weight % cathodoluminescent particles, which have a mean particle diameter equal to about 4 microns, and about 1 dry weight % non-cathodoluminescent inorganic particles, which have a mean particle diameter equal to about 20 microns. A method for fabricating phosphor includes the steps of providing an aqueous polyvinyl alcohol solution having about 7.5 weight % polyvinyl alcohol, adding cathodoluminescent particles to the aqueous polyvinyl alcohol solution to provide a cathodoluminescent particle solution having about 16.5 volume % cathodoluminescent particles, and adding non-cathodoluminescent inorganic particles to the cathodoluminescent particle solution to provide a phosphor paste. Non-cathodoluminescent inorganic particles function as dispersants and suspension-stabilizing agents in the phosphor paste.

Claims28

Dependent claims

A phosphor comprising:

a plurality of cathodoluminescent particles;
and
a plurality of non-cathodoluminescent inorganic particles interspersed among the plurality of cathodoluminescent particles and characterized by a particle size, the plurality of non-cathodoluminescent inorganic particles comprised of an electrically conductive non-cathodoluminescent inorganic material selected from the group consisting of SnO2, In2O3/SnO2, and Sb2O3/SnO2, wherein the plurality of cathodoluminescent particles and the plurality of non-cathodoluminescent inorganic particles together define a particulate component, wherein the particulate component is characterized by a dry weight % of non-cathodoluminescent inorganic particles, and wherein the particle size of the plurality of non-cathodoluminescent inorganic particles and the dry weight % of non-cathodoluminescent inorganic particles are selected to promote de-agglomeration in a phosphor paste used to fabricate the phosphor.

A method for fabricating a phosphor comprising the steps of:

providing a plurality of cathodoluminescent particles;
providing a plurality of non-cathodoluminescent inorganic particles characterized by a particle size, wherein the plurality of cathodoluminescent particles and the plurality of non-cathodoluminescent inorganic particles together define a particulate component, and wherein the particulate component is characterized by a dry weight % of non-cathodoluminescent inorganic particles;
providing a liquid carrier;
and
adding the plurality of cathodoluminescent particles and the plurality of non-cathodoluminescent inorganic particles to the liquid carrier to provide a cathodoluminescent particle solution, wherein the cathodoluminescent particle solution is characterized as a volume % of cathodoluminescent particles within a range of 16-35 volume % and adding the plurality of non-cathodoluminescent inorganic particles to the cathodoluminescent particle solution, wherein the dry weight % of non-cathodoluminescent inorganic particles is within a range of 1-3 dry weight %, wherein the dry weight % of non-cathodoluminescent inorganic particles and the particle size of the plurality of non-cathodoluminescent inorganic particles are selected to promote de-agglomeration of the plurality of cathodoluminescent particles within the cathodoluminescent particle solution.

2 more elements

Dependencies are inferred from the claim text.

Phosphor and method for the fabrication thereof

Life of this patent

Phosphor and method for the fabrication thereof

Life of this patent

Abstract

Claims28