Can you fire glaze in an oven?
Well, real glaze has a lot of silica and it takes some flux to make it possible to melt at the 2200 or 2300+ degrees in a pottery kiln. So there’s no way to get a silica glaze to fire in a home oven. But there are enamels that you can paint on ceramics that fire at 300F. Unfortunately, they aren’t food safe.