Ceramic (and masonry) aren't great in tension, which is the main mode for boilers. And its brittle, so it'll go from okay to exploding pretty fast. So not a gre

Ceramic (and masonry) aren't great in tension, which is the main mode for boilers. And its brittle, so it'll go from okay to exploding pretty fast. So not a great engineering choice. But, I suppose, you can use a lot of it, so you could probably make it work. Won't be terribly portable, though. And don't ask me to stand next to it.