| 摘要 |
PROBLEM TO BE SOLVED: To provide a silica glass member for wavelength conversion, for which environmental tolerance, heat resistance, durability and color rendering properties are high, which can be produced using a low-heat process, and which can efficiently convert wavelengths; and to provide a production method therefor.SOLUTION: A silica glass member for wavelength conversion is formed by a silica glass substrate and a silica glass surface layer film formed on the surface of the substrate. The silica glass surface layer film is obtained by: coating the surface of the silica glass substrate with a polysilazane-containing solution which contains phosphor particles the average particle diameter of which is 0.1-20 μm and spherical silica fine particles which are hydrophobic and have an average particle size of 1nm-100 nm; drying the coated substrate in the air; and carrying out heating in a water-vapor atmosphere. In the polysilazane-containing solution, the ratio of phosphor particles to the total amount of the polysilazane and phosphor particles is 10:3-7 parts by mass, and the NH group concentration of the silica glass surface layer film is no more than 1,000 ppm. |
