Device and method for the continuous fining of glasses with high purity requirements
AssigneeSchott AG
InventorsMichael Leister, Volker Ohmstede, Guenter Weidmann
Life of this patent
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Abstract
The present invention relates to a device and to a method for the continuous fining or homogenizing of inorganic matter, preferably low-viscosity glass melts in an apparatus. The device and method are distinguished in that the inclusion of bubbles and the occurrence of striations in the glass end product are significantly reduced or even entirely avoided when the melt contact surface of the apparatus has iridium or a high-iridium alloy as its material.
Claims69
A method for the fining of a glass melt (1), the method comprising:
- providing an apparatus (2) which defines a space for receiving the melt (1) and an atmosphere (6a) in contact with the melt (1), with at least one feed (3a), the glass melt (1) entering the apparatus (2) from the side through the feed (3a), and/or at least one discharge (3b), wherein at least one section (20) which at least partially has a melt contact surface (14a), of the apparatus (2) and/or of the feed (3a) and/or of the discharge (3b) comprises iridium, the iridium-comprising section (20) being provided with an iridium content of from about 50 wt. % to about 100 wt. %;
- and
- heating at least the iridium-comprising section (20) of the apparatus (2) and/or of the feed (3a) and/or of the discharge (3b).
A device for the fining of a glass melt (1), the device comprising:
- an apparatus (2) which defines a space for receiving the melt (1) and an atmosphere (6a) in contact with the melt (1);
- a feed (3a), the glass melt (1) entering the apparatus (2) from the side through the feed (3a);
- and
- a discharge (3b),
- wherein at least one section (20) which at least partially has a melt contact surface (14a), of the apparatus (2) and/or of the feed (3a) and/or of the discharge (3b) comprises iridium, the iridium-comprising section (20) being provided with an iridium content of from about 50 wt. % to about 100 wt. %.
A method for inhibiting hydrogen diffusion for a melt contact surface (14a) of a fining device, the method comprising utilizing iridium as a constituent of a bubble prevention layer.
Dependencies are inferred from the claim text.