Coating material for platinum material, platinum material coated with such coating material, and glass manufacturing apparatus

A coating and glass technology, applied in glass manufacturing equipment, metal material coating process, manufacturing tools, etc., can solve the problem of not being able to fully reduce air bubbles

Inactive Publication Date: 2007-09-26
TANAKA PRECIOUS METAL IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, the inventors of the present invention have studied the glass-based coating disclosed in Patent Document 3, and found that this proposal cannot sufficiently reduce the generation of air bubbles during glass production.

Method used

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  • Coating material for platinum material, platinum material coated with such coating material, and glass manufacturing apparatus
  • Coating material for platinum material, platinum material coated with such coating material, and glass manufacturing apparatus
  • Coating material for platinum material, platinum material coated with such coating material, and glass manufacturing apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4 and comparative example 1

[0074] This example is an example using the coating material in the form of a slurry according to the first embodiment of the present invention.

[0075] Among them, a coating material (fired coating) is produced on a platinum alloy substrate. The coating material uses a glass component as a matrix phase and aluminum oxide and silica as a dispersed phase and disperses it. No volatile loss of platinum. In this embodiment, four types of coating materials having different contents of each component are produced. First, a raw material gel (slurry) corresponding to the composition of the prepared coating material is produced.

[0076] Alumina and silica used for the raw material gel (slurry) are those in the state of an ion-free colloidal solution (alkali-free) (colloidal silica). The alumina and silica as the dispersed phase are preferably at least one of the alumina and silica from a colloidal solution as described in this embodiment. On the other hand, as the glass component,...

Embodiment 5

[0082] This example is an example according to the fourth embodiment of the present invention.

[0083] Among them, a coating material with a double-layer structure (fired coating) is produced. First, as a first covering layer, a raw material gel (slurry) containing alumina and silica (alumina: 53.1% by weight, silica: 46.9% by weight) was coated on a substrate. The solvent and adjustment method of this raw material gel are the same as in Examples 1-4, and only the compounding quantity was adjusted. On the other hand, the coating method is the same as in Examples 1 to 4, and is carried out by spraying. Then, after applying the gel, it was dried and fired to form a first covering layer (thickness: 150 μm).

[0084] After forming the first covering layer, a second covering layer is formed thereon. The second coating layer is a glass component layer containing 50% by weight of each of OA-10 and EF (both manufactured by NEC Glass Co., Ltd.) as glass components. The formation p...

Embodiment 6 and comparative example 2～4

[0089] This example is an example according to the first embodiment of the present invention.

[0090] Modulation has the glass composition Al shown in Table 3 2 o 3 , SiO 2 and ZrO 2 Composition of slurry. OA-10 (average particle size: 7 μm) is used as the glass component, and alumina particles (average particle size: 50 μm) are used as Al 2 o 3 , using colloidal silica (colloidal solution of silica, average particle size 20nm) as SiO 2 , using zirconia particles (average particle size 6μm) as ZrO 2 . The suspension was suspended in water twice the weight of the solid, and 3% by weight of methylcellulose was added to the weight of the solid to prepare a slurry.

[0091] [Coating slurry on platinum crucible]

[0092] After heating the inner surface of the blasted platinum crucible (diameter 46 mm, height 40 mm) with a heat gun, the slurry was sprayed on the bottom surface and the outer side of the platinum crucible for coating. The sides are coated to a height of 25 ...

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Abstract

Disclosed is a material for coating the surface of a platinum material made of platinum or an platinum alloy. Specifically disclosed is a coating material for platinum materials which contains a fire-resistant material component including alumina and silica, and a glass component.

Description

technical field [0001] The present invention relates to a coating material for covering platinum materials used in high-temperature environments such as glass manufacturing equipment. Background technique [0002] Platinum materials are generally used as constituent materials of devices (stirring tanks, melting tanks, clarification tanks, etc.) for producing high-quality glass such as optical glass and display glass. Platinum is used as the constituent material of these tower tanks. In addition to the high melting point of platinum, it will not form an oxide layer in the atmosphere and will not deteriorate, and the possibility of deformation and damage during the operation of the device is low. It is also because of its excellent chemical stability. The possibility of contamination of the glass in the molten state is also very low. Further, as the platinum material, platinum alloys such as platinum-rhodium alloys are widely used in addition to platinum (details are describe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C26/00
CPCC23C24/00C03B5/1672C23C26/00
Inventor 庄司亨加藤光夫桧山干雄高谷辰弥相德孝志
Owner TANAKA PRECIOUS METAL IND
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