Fluorescent substance composite glass, fluorescent substance composite glass green sheet, and process for producing fluorescent substance composite glass

Abstract

The present invention is to provide a fluorescent substance composite glass which is chemically stable, has a large size, is reduced in wall thickness, has a uniform thickness and therefore has a high energy conversion efficiency, a fluorescent substance composite glass green sheet and a process for producing the fluorescent substance composite glass. The fluorescent substance composite glass of the present invention is produced by baking a mixture containing a glass powder and an inorganic fluorescent substance powder, in which the energy conversion efficiency to a visible light wavelength region of 380 to 780 nm is 10% or more, when light having an emission peak in a wavelength range of 350 to 500 nm is applied.

1 . A fluorescent substance composite glass produced by baking a mixture containing a glass powder and an inorganic fluorescent substance powder, wherein the energy conversion efficiency to a visible light wavelength region of 380 to 780 nm is 10% or more, when light having an emission peak in a wavelength range of 350 to 500 nm is applied. 
   
   
       2 . The fluorescent substance composite glass according to  claim 1 , having a porosity of 10% or less. 
   
   
       3 . The fluorescent substance composite glass according to  claim 1 , wherein the glass powder is an SiO 2 —B 2 O 3 —RO type glass, in which RO represents MgO, CaO, SrO or BaO). 
   
   
       4 . The fluorescent substance composite glass according to  claim 1 , wherein the glass powder is a glass containing the following components: 30 to 70% of SiO 2 , 1 to 15% of B 2 O 3 , 0 to 10% of MgO, 0 to 25% of CaO, 0 to 10% of SrO, 8 to 40% of BaO, 10 to 45% of RO, 0 to 20% of Al 2 O 3  and 0 to 10% of ZnO based on mass percentage. 
   
   
       5 . The fluorescent substance composite glass according to  claim 1 , wherein the glass powder is a ZnO—B 2 O 3  type glass. 
   
   
       6 . The fluorescent substance composite glass according to  claim 1 , wherein the glass powder is a glass containing the following components: 5 to 60% of ZnO, 5 to 50% of B 2 O 3  and 0 to 30% of SiO 2  based on mass percentage. 
   
   
       7 . The fluorescent substance composite glass according to  claim 1 , wherein the mixing ratio by mass of the glass powder to the inorganic fluorescent substance powder is in a range from 99.99:0.01 to 70:30. 
   
   
       8 . A fluorescent substance composite glass green sheet produced by kneading a mixture containing at least a glass powder, an inorganic fluorescent substance powder and an organic type solvent binder resin, and molding the mixture into a sheet form. 
   
   
       9 . The fluorescent substance composite glass green sheet according to  claim 8 , wherein the glass powder is an SiO 2 —B 2 O 3 —RO type glass, in which RO represents MgO, CaO, SrO or BaO. 
   
   
       10 . The fluorescent substance composite glass green sheet according to  claim 1 , wherein the glass powder is a glass containing the following components: 30 to 70% of SiO 2 , 1 to 15% of B 2 O 3 , 0 to 10% of MgO, 0 to 25% of CaO, 0 to 10% of SrO, 8 to 40% of BaO, 10 to 45% of RO, 0 to 20% of Al 2 O 3  and 0 to 10% of ZnO based on mass percentage. 
   
   
       11 . The fluorescent substance composite glass green sheet according to  claim 8 , wherein the glass powder is a ZnO—B 2 O 3  type glass. 
   
   
       12 . The fluorescent substance composite glass green sheet according to  claim 8 , wherein the glass powder is a glass containing the following components: 5 to 60% of ZnO, 5 to 50% of B 2 O 3  and 0 to 30% of SiO 2  based on mass percentage. 
   
   
       13 . The fluorescent substance composite glass green sheet according to  claim 8 , wherein the mixing ratio by mass of the glass powder to the inorganic fluorescent substance powder is in a range from 99.99:0.01 to 70:30. 
   
   
       14 . A process for producing a fluorescent substance composite glass comprising laminating a restricting member, which does not react with the fluorescent substance composite glass green sheet as claimed in  claim 8  at a baking temperature of the glass green sheet, on one or both surface(s) of the glass green sheet, then carrying out baking treatment and then removing the restricting member. 
   
   
       15 . The process for producing a fluorescent substance composite glass according to  claim 14 , wherein the restricting member is a green sheet containing an inorganic composition or a porous ceramic substrate. 
   
   
       16 . The fluorescent substance composite glass according to  claim 3 , wherein the glass powder is a glass containing the following components: 30 to 70% of SiO 2 , 1 to 15% of B 2 O 3 , 0 to 10% of MgO, 0 to 25% of CaO, 0 to 10% of SrO, 8 to 40% of BaO, 10 to 45% of RO, 0 to 20% of Al 2 O 3  and 0 to 10% of ZnO based on mass percentage. 
   
   
       17 . The fluorescent substance composite glass according to  claim 5 , wherein the glass powder is a glass containing the following components: 5 to 60% of ZnO, 5 to 50% of B 2 O 3  and 0 to 30% of SiO 2  based on mass percentage. 
   
   
       18 . The fluorescent substance composite glass green sheet according to  claim 9 , wherein the glass powder is a glass containing the following components: 30 to 70% of SiO 2 , 1 to 15% of B 2 O 3 , 0 to 10% of MgO, 0 to 25% of CaO, 0 to 10% of SrO, 8 to 40% of BaO, 10 to 45% of RO, 0 to 20% of Al 2 O 3  and 0 to 10% of ZnO based on mass percentage. 
   
   
       19 . The fluorescent substance composite glass green sheet according to  claim 11 , wherein the glass powder is a glass containing the following components: 5 to 60% of ZnO, 5 to 50% of B 2 O 3  and 0 to 30% of SiO 2  based on mass percentage.