Ceramic-Coated Enameled Cookware for High-Heat Non-Stick Durability
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Solution Overview
Problem
Conventional enameled heat-cookers made of iron and steel materials lack non-stick functionality, leading to food sticking issues, and existing non-stick coatings like PTFE are toxic and degrade at high temperatures, posing health risks and durability problems.
Innovation Solution
A non-stick ceramic coating layer is applied on both surfaces of an enameled heat-cooker, comprising a glaze mixture with siliceous stone, feldspar, borax, and activated carbon, and a ceramic coating composition with silane compounds and far infrared ray-radiating materials, enhancing corrosion and heat resistance while preventing food sticking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a polytetrafluoroethylene (PTFE) coating layer is formed on the body of the heat-cooker to provide non-stick functionality, then food sticking is prevented, but the coating decomposes at high temperatures (above 260°C) and poses health risks due to PFOA catalyst residue
Solution Approach 1:
The patent changes the material composition parameters of the coating layer, transitioning from organic PTFE polymer to inorganic ceramic coating with specific composition ratios (silica 40-70 wt%, alumina 10-30 wt%, titania 5-20 wt%, zirconia 5-20 wt%). This parameter change enables the coating to withstand high temperatures above 260°C without decomposition while maintaining non-stick properties.
Solution Approach 2:
The patent creates a composite ceramic coating system combining multiple inorganic materials (silica, alumina, titania, zirconia) with complementary properties. Silica provides thermal stability and non-stick characteristics, while alumina, titania, and zirconia enhance mechanical strength, heat resistance, and chemical stability. This composite structure resolves the contradiction between non-stick functionality and high-temperature reliability.
2Reliability
If an enamel coating is applied on iron and steel material to improve corrosion resistance, then durability is enhanced, but the coating lacks non-stick function causing food to stick during cooking
Solution Approach 1:
The patent merges the advantages of enamel coating (corrosion resistance, durability) with ceramic coating (non-stick functionality, heat resistance) into a unified multi-layer structure. The enamel layer provides the protective base while the ceramic coating layer adds non-stick properties, resolving the contradiction between corrosion resistance and non-stick functionality.
Solution Approach 2:
The patent employs a composite structure combining organic-enamel and inorganic-ceramic materials. The enamel layer (typically glass-ceramic matrix with metal oxides) provides corrosion protection, while the ceramic coating layer (silica-alumina-titania-zirconia system) provides non-stick functionality and high-temperature stability. This composite material approach allows simultaneous achievement of both corrosion resistance and non-stick properties.
3Reliability
If a ceramic coating layer is formed to provide high-temperature stability and non-stick properties, then the coating is non-toxic and durable, but the adhesion between the coating and enamel layer may be insufficient
Solution Approach 1:
The patent applies preliminary surface treatment to the enamel layer before applying the ceramic coating. This includes sandblasting or chemical etching to create surface roughness, and application of a primer or coupling agent that enhances chemical bonding between the enamel substrate and ceramic coating. This preliminary action ensures strong adhesion while maintaining the durability and safety benefits of the ceramic coating.
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 provides a non-toxic, durable, and environmentally friendly heat-cooker with improved corrosion, abrasion, and heat resistance, preventing food from sticking and meeting consumer demands with enhanced safety and performance.
Implementation Method 1
a non-stick ceramic coating layer which emits anions, radiates far infrared rays, is non-adhesive, and is non-toxic to the human body
Implementation Method 2
a non-stick ceramic coating layer which emits anions, radiates far infrared rays
Implementation Method 3
a ceramic coating composition with silane compounds and far infrared ray-radiating materials
Data Source
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AI summary
The present invention relates to enameled-heated cooking utensils with a non-stick ceramic coating layer, and a preparation method thereof, wherein enamel layers are formed on both sides of a main body of heating cooking utensils which is made by using an iron and steel material such as cast ion, steel, cold rolled steel plate and the like, and a non-stick ceramic coating layer which emits anions, radiates far infrared rays, is nonadhesive and does not harm the human body, is formed on the outer surface of the enamel layers. The surface roughness of the enamel layers is improved by sandblasting the outer surface of the enamel layers or forming an enamel layer containing silica fine particles on the outer surface of the enamel layers after forming the enamel layers on the outer portion of the main body made of an iron and steel material, and the adhesive force between the enamel layers and the non-stick ceramic coating layer is enhanced by forming a non-stick ceramic coating layer on the outer surface. The enameled heating cooking utensils according to the present invention has excellent corrosion resistance, abrasion resistance, heat resistance and the like, prevents food from sticking when heating food, and is environmentally-friendly by forming a ceramic coating layer which does not harm human body differently from polytetrafluoroethylene (PTFE) recently used as a non-stick coating agent, as a non-stick layer, and thus the demand of the enameled-heated cooking utensils according to the present invention is expected to remarkably increase hereafter.