Coating Material For Platinum Material, Platinum Material Coated With Such Coating Material, And Glass Manufacturing Apparatus

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.

1 . A coating material for platinum material, which is contemplated to coat a surface of a platinum material made of platinum or a platinum alloy, characterized as containing a refractory component including alumina and silica, and a glass component.  
     
     
         2 . The coating material for platinum material as recited in  claim 1 , wherein the glass component comprises an alkali-free borosilicate or aluminoborosilicate glass.  
     
     
         3 . The coating material for platinum material as recited in  claim 1 , wherein said alumina, silica and glass component are contained in the amounts of 15-55% by weight, 10-50% by weight and 20-70% by weight, respectively.  
     
     
         4 . The coating material for platinum material as recited in  claim 1 , wherein said silica is at least partly in the form of colloidal silica.  
     
     
         5 . The coating material for platinum material as recited in  claim 4 , characterized as containing alumina particles, the glass component and the colloidal silica.  
     
     
         6 . The coating material for platinum material as recited in  claim 4 , characterized as containing a ground product obtained by grinding a sintered body of a mixture of alumina particles and the glass component, and the colloidal silica.  
     
     
         7 . The coating material for platinum material as recited in  claim 1 , characterized as comprising a slurry containing alumina particles, the glass component and silica particles.  
     
     
         8 . The coating material for platinum material as recited in  claim 5 , characterized as comprising a slurry containing the alumina particles, the glass component and the colloidal silica.  
     
     
         9 . The coating material for platinum material as recited in  claim 6 , characterized as comprising a slurry containing the ground product obtained by grinding a sintered body of a mixture of the alumina particles and the glass component, and the colloidal silica.  
     
     
         10 . The coating material for platinum material as recited in  claim 7 , characterized in that the slurry contains an organic binder.  
     
     
         11 . The coating material for platinum material as recited in  claim 1 , characterized as containing a ground product obtained by grinding a sintered body of a mixture of alumina particles, silica particles and the glass component.  
     
     
         12 . The coating material for platinum material as recited in  claim 1 , characterized as comprising a paste or green sheet containing alumina particles, silica particles and the glass component.  
     
     
         13 . The coating material for platinum material as recited in  claim 11 , characterized as comprising a paste or green sheet containing the ground product obtained by grinding a sintered body of a mixture of the alumina particles, silica particles and glass component.  
     
     
         14 . The coating material for platinum material as recited in  claim 12 , characterized in that the alumina particles consist at least partly of fibrous alumina particles.  
     
     
         15 . The coating material for platinum material as recited in  claim 12 , characterized in that the paste or green sheet contains an organic binder.  
     
     
         16 . A method for coating a platinum material, characterized in that the coating material as recited in  claim 1  is coated or adhered onto a surface of the platinum material and then fired.  
     
     
         17 . A method for coating a platinum material, characterized in that the slurry as recited in  claim 7  is coated on a surface of the platinum material and then fired.  
     
     
         18 . The method for coating a platinum material as recited in  claim 17 , characterized in that the slurry is spray coated on the surface of the platinum material.  
     
     
         19 . A method for coating a platinum material, characterized in that the paste or green sheet as recited in  claim 12  is adhered onto the surface of the platinum material and then fired.  
     
     
         20 . A method for coating a platinum material, characterized in that the slurry as recited in  claim 7  is coated on the surface of the platinum material to form a slurry coating layer, a taste or green sheet comprising alumina particles, silica particles and a class component is adhered onto the slurry coating layer to form a protective coating layer, and then firing is achieved.  
     
     
         21 . The method for coating a platinum material as recited in  claim 16 , characterized in that the surface of the platinum material is subjected to a blasting treatment before the coating material is coated or adhered thereto.  
     
     
         22 . A fired coating film for platinum material, which is contemplated to coat a surface of a platinum material made of platinum or a platinum alloy, characterized in that it is obtained by coating or adhering the coating material as recited in  claim 1  onto the surface of the platinum material and then firing the applied coating material.  
     
     
         23 . A fired coating film for platinum material, which is contemplated to coat a platinum material made of platinum or a platinum alloy, characterized in that it includes a matrix phase comprising a glass component and a dispersed phase comprising alumina particles and silica particles and dispersed in the matrix phase.  
     
     
         24 . A fired coating film for platinum material, which is contemplated to coat a surface of a platinum material made of platinum or a platinum alloy, characterized in that it is obtained by coating the coating material as recited in  claim 4  on the surface of the platinum material and then firing the applied coating material.  
     
     
         25 . A fired coating film for platinum material, which is contemplated to coat a platinum material made of platinum or a platinum alloy, characterized in that it includes a matrix phase comprising a glass component and a colloidal silica component, and a dispersed phase comprising alumina particles and dispersed in the matrix phase.  
     
     
         26 . A fired coating film for platinum material, which is contemplated to coat a surface of a platinum material made of platinum or a platinum alloy, characterized in that it is obtained by adhering the paste or green sheet as recited in  claim 12  onto the surface of the platinum material and then firing the applied paste or green sheet.  
     
     
         27 . A fired coating film for platinum material, which is contemplated to coat a surface of a platinum material made of platinum or a platinum alloy, characterized in that it is obtained by coating the slurry as recited in  claim 7  on the surface of the platinum material to form a slurry coating layer, adhering a paste or green sheet comprising alumina particles, silica particles and a glass component onto the slurry coating layer to form a protective coating layer and then firing the applied coating layers.  
     
     
         28 . The fired coating film for platinum material as recited in  claim 27 , characterized in that said slurry coating layer includes a matrix phase comprising a glass component and a colloidal silica component, and a dispersed phase comprising alumina particles and dispersed in the matrix phase.  
     
     
         29 . The fired coating film for platinum material as recited in  claim 27 , characterized in that said protective coating layer includes a matrix phase comprising the glass component and a dispersed phase comprising alumina particles and silica particles and dispersed in the matrix phase.  
     
     
         30 . A fired coating film for platinum material, which is contemplated to coat a surface of a platinum material made of platinum or a platinum alloy, characterized in that it is obtained by firing a coating material having a two-layer structure which consists of a first coating layer in contact with the platinum material and comprising a mixture of alumina and silica and a second coating layer provided on the first coating layer and comprising a glass component.  
     
     
         31 . A platinum material made of platinum or a platinum alloy, characterized in that it is coated with the coating material as recited in  claim 1 .  
     
     
         32 . A platinum material made of platinum or a platinum alloy, characterized in that it has the fired coating film as recited in  claim 22  on its surface.  
     
     
         33 . A glass manufacturing apparatus using, as a constituent material, a platinum material made of platinum or a platinum alloy, characterized in that its outer surface is coated with the coating material as recited in  claim 1 .  
     
     
         34 . A glass manufacturing apparatus using, as a constituent material, a platinum material made of platinum or a platinum alloy, characterized in that its outer surface is covered with the fired coating film as recited in  claim 22.