There was several discussions on ceramic materials and burners. Cotronics has a range of high temperature materials up to 3000 °F you can cast, form, and machine. Take a look at www.cotronics.com.
I have used their formable blanket material. It comes wet and after forming it into the shape you want, you bake it in a oven. Their castable and machinable ceramics come in several materials and you can buy pint, etc kits. I cast a high temperature shaped alumina refactory shape in a silicone rubber mold. They also have high temperature putties and adhesives. Harley
