Method utilizing a ceramic for temperature measurement
First Claim
1. A method of providing on the surface of a substrate a thermally responsive coating capable of at least one of visually and physically indicating an elevated temperature to which the substrate is subjected, said method comprising the steps of:
- melting glass forming ceramic material substantially comprising SiO2 to form a molten mass;
infusing into the molten mass material comprised of at least one colorant metallic oxide in an amount up to approximately 5% by weight of the molten mass;
quenching to the solid state the molten mixture composed of the ceramic material and the colorant metallic oxide;
crushing and classifying the solid state mixture into a powder comprised of particles in the size range of less than approximately 38 microns; and
applying the powder mixture to the surface of the substrate as a film.
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Accused Products
Abstract
A ceramic thin film applique provided on a substrate effects an optical transition at a predetermined elevated temperature. Below the transition temperature, the applique exhibits distinctive visual and physical characteristics, for example color, opaqueness and/or texture, but when the substrate is heated to the transition temperature, the visual and physical characteristics of the applique change noticeably. The invention encompasses the composition of the applique itself, as well as the methods of making the applique, applying it to the substrate, and using it.
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Citations
10 Claims
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1. A method of providing on the surface of a substrate a thermally responsive coating capable of at least one of visually and physically indicating an elevated temperature to which the substrate is subjected, said method comprising the steps of:
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melting glass forming ceramic material substantially comprising SiO2 to form a molten mass; infusing into the molten mass material comprised of at least one colorant metallic oxide in an amount up to approximately 5% by weight of the molten mass; quenching to the solid state the molten mixture composed of the ceramic material and the colorant metallic oxide; crushing and classifying the solid state mixture into a powder comprised of particles in the size range of less than approximately 38 microns; and applying the powder mixture to the surface of the substrate as a film. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of providing on the surface of a substrate a thermally responsive coating capable of at least one of visually and physically indicating to the unaided eye an elevated transition temperature to which the substrate is subjected, said method comprising the step of:
applying to the surface of the substrate a transition layer comprising a mixture of glass forming ceramic material and one or more colorant metallic oxides for indicating an elevated transition temperature to which the substrate is to be subjected. - View Dependent Claims (9, 10)
Specification