Patent ID: 11952302
Assignee: HERAEUS QUARZGLAS GMBH & CO. KG
Field: Other special machines (Mechanical engineering)
Classification: CPC C | IPC C

Claim 0:
1. A process for the production of fluorinated quartz glass, characterized by:
(a) generating SiO2 particles in a synthesis burner;
(b) depositing the SiO2 particles resulting from process (a) on a substrate to form a body; and
(c) vitrifying the body resulting from process (b),
wherein a fluorinating agent having a boiling point of greater than or equal to −10° C. is introduced to the synthesis burner during process (a),, wherein fluorinating agent is selected from a group comprising:
i. oxygen-containing fluorinating agents;
ii. nitrile-containing fluorinating agents;
iii. mixtures of the oxygen-containing and nitrile-containing fluorinating agents, characterized in that the oxygen-containing fluorinating agents are selected from the group consisting of:
i. Perfluoroketones of the general formula (I)

RF1—CO—RF2  (I),

wherein RF1 is selected from the group consisting of perfluorinated carbon groups having 1 to 7 carbon atoms and fluorine; and RF2 is selected from the group consisting of perfluorinated carbon groups having 1 to 7 carbon atoms;

ii. Perfluoroethers of the general formula (II)

RF1—C(X1)(X2)O—RF2  (II),

wherein RF1 is selected from the group consisting of perfluorinated carbon groups having 1 to 7 carbon atoms and fluorine; RF2 is selected from the group consisting of perfluorinated carbon groups having 1 to 7 carbon atoms; and X1 and X2 are F or CF3;

iii. Hydrofluoroethers of the general formula (III)

RF1—C(X1)(X2)O—RF2  (II),

wherein RF1 is selected from the group consisting of perfluorinated carbon groups having 1 to 7 carbon atoms and fluorine; R2 is a non-fluorinated hydrocarbon group having from 1 to 3 carbon atoms; X1 and X2 stand for F or CF3;
characterized in that the fluorinating agent is supplied to the synthesis burner in liquid or gaseous form.