Patent ID: 6079225
Filing Date: 2000-06-27
Classification: C03B,F23D

Abstract:
A method for the production of a quartz glass blank, said method comprising:supplying a glass-forming base material in liquid form to an injection nozzle of a multi-nozzle flame deposition burner, said injection nozzle having an orifice;vaporizing or atomizing the liquid glass-forming base material in the deposition burner;mixing of the vaporized or atomized glass-forming base material with a gas containing oxygen to create SiO.sub.2 particles in a chemical reaction;deposition of the SiO.sub.2 particles on a substrate to create a porous preform; andsintering of the preform;a vaporizing gas being fed to the deposition burner through a passage that widens to a larger flow cross-section adjacent the orifice of the injection nozzle, aiding in the vaporizing or atomizing of the glass-forming base material.