Surface-treated fluorescent material and process for producing surface-treated fluorescent material

摘要

Provided are a surface treated phosphor having high dispersibility and remarkably improved moisture resistance without degradation in fluorescence properties, and a method of producing the surface treated phosphor.;The present invention relates to a surface treated phosphor including: a phosphor matrix including an alkaline earth metal and silicon; and a surface treatment layer including an alkaline earth metal, silicon, and a specific element belonging to groups 4 to 6 of the periodic table, wherein, when element distribution of the surface treatment layer in the thickness direction viewed in cross-section is determined by electron microscopy and energy dispersive X-ray spectroscopy coupled with the electron microscopy, the position representing the maximum peak of a specific element content is located closer to the surface than the position representing the maximum peak of a silicon content and silicon contents of the phosphor matrix and the surface treatment layer satisfy the following formula (1):
[Formula 1]S1

主权项

1. A surface treated phosphor comprising:
a phosphor matrix including an alkaline earth metal and silicon; and a surface treatment layer including an alkaline earth metal, silicon, and a specific element belonging to groups 4 to 6 of the periodic table, wherein, when element distribution of the surface treatment layer in the thickness direction viewed in cross-section is determined by electron microscopy and energy dispersive X-ray spectroscopy coupled with the electron microscopy, the position representing the maximum peak of the specific element content is located closer to an upper surface of the surface treatment layer than the position representing the maximum peak of a silicon content in the surface treatment layer and silicon contents of the phosphor matrix and the surface treatment layer satisfy the following formula (1):
[Formula 1]S1