Hello, I am doing a project which involves very hot confined plasma. The problem is, quartz tubing is way too expensive for me. I don't want to deal with impurities so I came to ask if you can suggest any cheaper alternatives. Here are my ideas: Borosilicate glass with "getter" coating. (I don't know what will happen with deuterium) Any material with quartz coating inside. (This sounds a bit impossible) Thank you. edit: http://phys.org/news184310039.html this seems interesting.