| abstract |
This composite powder includes a glass powder and a ceramic powder and is characterized by including 30 to 60% by volume of the glass powder and 40 to 70% by volume of the ceramic powder, by the glass powder including, as a glass composition, in mass%, 10 to 30% of SiO 2 , over 20 to 40% of B 2 O 3 , 20 to 40% of SrO+BaO, 0 to 10% of Al 2 O 3 , and 0 to 15% of ZnO, and by being used for a light reflective substrate. |