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Method for eliminating carbon contamination of precious metal components

A part, platinum metal technology, used in the field of connecting precious metal parts, which can solve problems such as molten glass contamination

Active Publication Date: 2012-05-02
CORNING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Despite the relatively stable performance of platinum (or platinum alloys) when immersed in corrosive molten glass, some of these platinum components have been found to cause accidental contamination of the molten glass with gas inclusions or bubbles

Method used

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  • Method for eliminating carbon contamination of precious metal components
  • Method for eliminating carbon contamination of precious metal components
  • Method for eliminating carbon contamination of precious metal components

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[0049] The test sample (sample 1 ) in the form of a bag was made from two 0.762 mm thick plates of 90% platinum-10% rhodium alloy. A 10 mg sample of carbon was sealed in the bag by welding the edge of the plate. Then, the sample was immersed in a molten glass bath (EagleXG manufactured by Corning Incorporated) at 1450°C TM glass) for 24 hours. Sample 1 ( Figure 8 ) without prior heat treatment of the platinum-rhodium alloy according to the embodiments described herein prior to immersion. Figure 8 Shows the generation of a large number of blisters (bubbles) at the surface of the sealed metal bag due to high temperature immersion.

[0050] For comparison, another sample (Sample 2) was made in the same manner as Sample 1, and also had 10 mg of carbon placed in a sealed bag. Sample 2 was immersed in molten EagleXG at the same 1450°C as per Sample 1 TM Heat treatment at 1450°C for 7 days (168) hours before the glass bath. Figure 9 Sample 2 after being immersed in molten gl...

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Abstract

In the formation of sheet material from molten glass, molten glass is formed in a melting furnace and transported through a precious metal delivery system to the forming apparatus. Disclosed herein is a method to eliminate carbon-containing contamination of individual components of the precious metal delivery system prior to their installation and use. The method comprises one or more heat treating steps in an oxygen-containing atmosphere prior to and / or during assembly of the component.

Description

[0001] Claiming Priority Benefits of Filing U.S. Applications [0002] This application claims the benefit of priority to US Application Serial No. 12 / 871,245, filed August 30, 2010. The content of this document as well as the entire disclosures of the publications, patents and patent documents mentioned herein are incorporated by reference. technical field [0003] The present invention relates to a method for joining precious metal components, and more particularly to a method for reducing gas bubbles in molten glass due to carbon contamination of precious metal components of a glassmaking system. Background technique [0004] Glass manufacturing systems used to deliver high quality glass in the manufacture of precision glass articles require special attention to the delivery system. Such precision products can include optical lenses and glass panels used in the manufacture of display devices [0005] Molten glass delivery systems for high precision products can often be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B5/187
CPCC22B9/14C03B5/187C03B5/00C03B5/18C03B5/225
Inventor M·H·戈勒尔D·M·莱恩曼S·R·莫西尔
Owner CORNING INC
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