Interference Pigment Nanoglass Coating for Smooth Surfaces
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Solution Overview
Problem
Current methods for producing nanoglass layers with interference pigments result in rough, porous, and non-impervious layers due to the large size of commercially available pigments, which are difficult to comminute without damaging the interference layers and affecting the color effect.
Innovation Solution
A wet grinding process, specifically using a high-speed rotary ball mill, is employed to comminute interference pigments to a particle size below 6 μm, maintaining the interference effect and enabling the production of high-quality nanoglass layers with improved smoothness and density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If interference pigments are comminuted to reduce particle size, then layer smoothness and density improve, but the interference layers of pigments are damaged or destroyed
Solution Approach 1:
The patent changes the particle size parameter of interference pigments from conventional sizes (>10 μm) to ultrafine sizes (0.1-5 μm) through controlled comminution processes. This parameter change enables the pigments to be embedded smoothly in the glass matrix without projecting from the surface, while the controlled nature of the comminution preserves the interference layers.
Solution Approach 2:
The patent applies different quality requirements to different aspects of the pigment particles: the overall particle size is reduced to ultrafine dimensions, while the local interference layers on the particle surfaces are preserved intact. This local quality approach allows the particles to be small enough for smooth embedding while maintaining the optical interference properties.
2Manufacturing precision
If interference pigments are comminuted to reduce particle size, then layer density improves, but the interference layers of pigments are damaged or destroyed
Solution Approach 1:
The patent changes the particle size parameter from conventional sizes to ultrafine sizes (0.1-5 μm), which enables better packing density in the glass matrix. The controlled comminution process achieves this density improvement while preserving the interference layers through careful process control.
Solution Approach 2:
The interference pigments are comminuted to the required ultrafine size before being incorporated into the glass matrix. This preliminary action ensures that the particles are already optimized for dense embedding while their interference layers are preserved, avoiding subsequent damage during processing.
3Ease of manufacture
If commercially available interference pigments are used, then production simplicity is maintained, but the resulting layers are rough and porous
Solution Approach 1:
The interference pigments undergo preliminary comminution to reduce their particle size to ultrafine dimensions (0.1-5 μm) before being used in the glass coating process. This preliminary size reduction enables commercially available pigments to produce smooth, dense layers without requiring complex alternative pigment sources.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The process allows for the creation of smooth, dense, and optically effective nanoglass layers on metal, glass, and ceramic surfaces, retaining the interference color effect while achieving a high degree of comminution of interference pigments, suitable for various applications.
Implementation Method 1
comminuting an interference pigment having at least one dielectric interference layer by a wet grinding process
Implementation Method 2
interference of dielectric layers matched to one another with different refractive indices
Implementation Method 3
densifying the applied coating composition at a temperature of not more than 650° C. to form the vitreous layer
Data Source
AI summary
A process for providing a substrate having a metal, glass or ceramic surface with a vitreous layer comprising an interference pigment. The process comprises comminuting an interference pigment having at least one dielectric interference layer by a wet grinding process; dispersing the comminuted interference pigment into a silicate-containing suspension to obtain a coating composition; applying the coating composition to the surface by a wet coating process; and densifying the coating composition at a temperature of not more than 650° C.