Micro-Textured Glass-Ceramic Surface for Abrasion and Gloss Control
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Solution Overview
Problem
Existing glass-ceramic plates face challenges in maintaining abrasion resistance while minimizing surface defects and gloss variation, particularly during manufacturing and use, which complicates production and affects ease of cleaning and maintenance.
Innovation Solution
A glass-ceramic article with a micro-textured surface having specific roughness parameters (Ra 0.14-0.40 μm, Rt 1.15-5.00 μm) is produced by shot-peening the rolling rollers with martensitic steel particles, creating a random texturing that masks manufacturing defects and reduces gloss variation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the glass-ceramic surface is highly polished to achieve low roughness (Ra < 0.05 μm), then the surface gloss and aesthetic appearance are improved, but the surface becomes more sensitive to abrasion from cleaning and use, leading to visible defects and gloss variation
Solution Approach 1:
The invention changes the surface roughness parameter from extremely low (highly polished) to a controlled range (Ra 0.05-0.50 μm, preferably Ra 0.10-0.30 μm). This parameter optimization provides a compromise that maintains sufficient gloss while improving abrasion resistance and reducing the visibility of defects during use and cleaning.
2Reliability
If the glass-ceramic surface is left unpolished or with high roughness to improve abrasion resistance, then the surface becomes more resistant to cleaning damage, but manufacturing defects become more visible and the gloss variation increases
Solution Approach 1:
The invention optimizes the surface roughness parameter to a specific range (Ra 0.05-0.50 μm) that balances two opposing requirements: it is rough enough to mask manufacturing defects and reduce gloss variation, but smooth enough to maintain good aesthetic appearance and ease of cleaning. This controlled roughness range resolves the contradiction between abrasion resistance and defect visibility.
3Illumination intensity
If a polishing step is added to achieve low surface roughness and high gloss, then the aesthetic appearance is improved, but the manufacturing complexity and production time increase
Solution Approach 1:
The invention applies shot peening treatment to the rolling rollers before the glass-ceramic manufacturing process. This preliminary action creates the desired surface roughness (Ra 0.05-0.50 μm) on the rollers, which then imprints the optimized surface texture on the glass-ceramic plates during rolling. This eliminates or reduces the need for subsequent polishing steps, thereby simplifying the manufacturing process while maintaining aesthetic quality.
4Manufacturing precision
If the surface roughness is reduced to mask manufacturing defects, then the aesthetic appearance is improved, but the surface becomes more susceptible to abrasion during cleaning and use
Solution Approach 1:
The invention identifies and implements an optimal surface roughness range (Ra 0.05-0.50 μm, preferably Ra 0.10-0.30 μm) that simultaneously achieves defect masking and cleaning durability. Within this range, the surface is smooth enough to mask manufacturing defects effectively but rough enough to resist abrasion during cleaning and normal use, resolving the contradiction between aesthetic appearance and cleaning durability.
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 micro-textured surface effectively masks manufacturing defects and minimizes gloss variation due to abrasion, ensuring durable and easy-to-clean glass-ceramic products suitable for cooking and furniture applications.
Implementation Method 1
shot-peening the rolling rollers with martensitic steel particles, creating a random texturing
Data Source
AI summary
A glass-ceramic article includes at least one substrate, such as a plate, made of glass-ceramic, the substrate having a face including a microtexturing such that the arithmetic mean surface roughness Ra, measured according to standard ISO 4287, is between 0.14 and 0.40 μm, and the total roughness, Rt, measured according to standard ISO 4287, is between 1.15 and 5.00 μm.