For the crystal growing industry, several manufacturers require a carbon layer to separate the crystal material from the surface of the quartz ampoule.
This pyrolyzed carbon facilitates crystal removal and allows for repeated usage of the ampoule. To meet this requirement, Sandfire Scientific has developed several methods of putting a high-purity layer of pyrolyzed carbon on the inside of Quartz tubes from 6mm to 125mm ID and lengths of over 450mm. We also coat quartz discs with the same carbon layer. We always strive to improve our techniques in order to respond to the ever growing demands of the industry.