GLASS CERAMIC SUBSTRATE
The present invention provides glass ceramic substrates 11 a to 11 d each containing a glass component and a plate-like alumina filler dispersed in the glass component, wherein the plate-like alumina filler has an average plate diameter of 0.1 to 20 μm and an average aspect ratio of 50 to 80, and wherein the plate-like alumina filler has a content of 22 to 35% by volume based on a total amount of the glass component and plate-like alumina filler.
1 . A glass ceramic substrate comprising a glass component and a plate-like alumina filler dispersed in the glass component,
wherein the plate-like alumina filler has an average plate diameter of 0.1 to 20 μm and an average aspect ratio of 50 to 80; and
wherein the plate-like alumina filler has a content of 22 to 35% by volume based on a total amount of the glass component and plate-like alumina filler.