Method of manufacturing fluorescent material

A method of manufacturing a fluorescent material, comprising the steps of:

• (a) mixing a fluorescent raw material matrix, a flux, a particle growth retardant not reactive with the fluorescent raw material matrix and baking such mixture to obtain an intermediate fluorescent material, wherein the particle growth retardant is a chemically stable metal compound including at least one selected from metal oxide, nitride, and carbonate;
• wherein said metal oxide is selected from the group comprising aluminum oxide, silicon oxide, and zirconium oxide;
• wherein said nitride is selected from the group comprising silicon nitride and aluminum nitride;
• and wherein said carbonate is selected from the group comprising silicon carbonate, tungsten carbonate, and tantalum carbonate;
• and
• (b) removing the particle growth retardant from the intermediate fluorescent material.

A method of manufacturing a fluorescent material, comprising the steps of:

• a) mixing a fluorescent raw material matrix of zinc sulfide, a flux, an activator raw material and a particle growth retardant of aluminum oxide and then baking such mixture at a first temperature to obtain an intermediate fluorescent material;
• b) removing the particle growth retardant from the intermediate fluorescent material;
• c) forming crystal defects in the intermediate fluorescent material;
• and
• d) baking the resulting intermediate fluorescent material at a second temperature lower than the first temperature.

A method of manufacturing a fluorescent material, comprising the steps of:

• a) mixing a zinc sulfide fluorescent raw material matrix, a flux, an activator raw material and an aluminum oxide particle growth retardant, not reactive with the fluorescent raw material matrix, and the baking such mixture at a first temperature to obtain an intermediate fluorescent material;
• b) removing the particle growth retardant from the intermediate florescent material;
• c) forming crystal defects in the intermediate fluorescent material;
• and
• d) baking the resulting intermediate fluorescent material at a second temperature lower than the first temperature.