Ceramic Glaze Double-Layer Composition for Smoothness and Antibacterial Activity
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Solution Overview
Problem
Existing ceramic glazes for sanitaryware lack a cost-effective solution that simultaneously enhances smoothness and antibacterial activity without compromising the original appearance, with existing methods like sol-gel technology being expensive and double-layer glazes affecting the glaze's roughness.
Innovation Solution
A double-layer glaze composition with a modified silica-alumina ratio in the transparent layer, incorporating less than 5% zinc oxide and 2% tin oxide, applied in a thin transparent layer over an opacified first layer, achieving a smooth surface with reduced bacterial attachment sites and maintaining the original appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If sol-gel technology is used to create easy-to-clean ceramic glazes, then the smoothness and antibacterial activity are improved, but the manufacturing cost increases significantly
Solution Approach 1:
The patent modifies the chemical composition parameters of traditional ceramic glazes by incorporating specific amounts of zinc oxide (0.1-5 wt%) and tin oxide (0.1-2 wt%), along with adjusting the silica-alumina ratio. This compositional parameter change enables the glaze to achieve smoothness and antibacterial properties through conventional firing processes, avoiding the need for expensive sol-gel technology while maintaining manufacturing cost-effectiveness.
2Reliability
If double-layer glaze is applied to achieve antimicrobial efficacy, then the antibacterial activity is improved, but the glaze appearance and roughness are affected
Solution Approach 1:
The patent merges multiple functions into a single glaze layer by incorporating antimicrobial agents (zinc oxide and tin oxide) directly into the glaze composition along with smoothing agents. This unified approach eliminates the need for separate functional layers, preventing appearance degradation while achieving both antibacterial activity and surface smoothness simultaneously.
Solution Approach 2:
The patent creates a composite glaze material combining traditional ceramic components (silica, alumina) with antimicrobial additives (zinc oxide, tin oxide) and smoothing agents. This composite formulation integrates multiple functionalities within a single homogeneous glaze layer, maintaining aesthetic appearance while providing antibacterial protection.
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 solution achieves a significant reduction in average roughness to below 70 nm and achieves antimicrobial efficacy with reduced oligodynamic strength, ensuring the glaze is both easy to clean and maintains its appearance while effectively reducing bacterial growth.
Implementation Method 1
achieves antimicrobial efficacy with reduced oligodynamic strength, ensuring the glaze is both easy to clean and maintains its appearance while effectively reducing bacterial growth
Data Source
AI summary
A sanitary apparatus may be, among other things, a toilet bowl, a sink, a basin, a bathtub, a bidet, or a urinal. The sanitary apparatus includes a water vessel, and a water drain configured to empty the water vessel. The water vessel includes a clay body, a first layer over the clay body, the first layer is at least in part an opacified glaze, and a second layer over the first layer, the second layer is at least partially transparent and includes silica and alumina in a predetermined ratio of 9 or greater.