Thermochromic Non-Stick Coating for Clear Pan Temperature Indication
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Solution Overview
Problem
Existing thermal indicators on cooking utensils are difficult to understand, especially for users without special training, as they often rely on subtle color changes that can be confusing, and are not durable enough for repeated use.
Innovation Solution
A non-stick coating with a pigment composition that exhibits a reversible variation in optical and colorimetric properties, specifically a garnet-type compound (Y3-xMxFe5-yQyO12) that changes color from green to red between 0°C and 400°C, providing clear temperature indication and excellent thermal and chemical resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing thermal indicators use subtle color changes or multiple patterns, then temperature indication function is provided, but user understanding becomes difficult and readability decreases
Solution Approach 1:
The patent applies thermochromic pigments that undergo distinct color changes at different temperature ranges. The first thermochromic pigment changes color in a first temperature range, while the second thermochromic pigment changes color in a second temperature range. This creates clearly distinguishable visual signals for different temperature zones, making it easy for users to understand the temperature status without confusion.
Solution Approach 2:
The patent divides the thermal indicator into distinct zones with different pigment compositions. Each zone is optimized for specific temperature detection, with the first zone containing the first thermochromic pigment and the second zone containing the second thermochromic pigment. This local differentiation allows each area to serve its specific temperature indication function while maintaining overall readability.
2Measurement precision
If existing thermal indicators use multiple patterns with similar colors, then temperature detection capability is provided, but visual distinction between temperature zones becomes confused
Solution Approach 1:
The patent employs two different thermochromic pigments that produce distinctly different colors when activated at their respective temperature ranges. The first thermochromic pigment transitions to a first color at the first temperature range, while the second thermochromic pigment transitions to a second color at the second temperature range. This ensures clear visual differentiation between temperature zones, preventing information loss and confusion.
Solution Approach 2:
The patent utilizes changes in optical parameters (color) of thermochromic pigments in response to temperature changes. By selecting pigments with different color transition characteristics and ensuring the colors are sufficiently distinct, the patent maintains precise temperature detection capability while avoiding visual confusion between zones.
3Reliability
If existing thermal indicators rely on subtle color variations, then temperature monitoring function is achieved, but durability for repeated use is insufficient
Solution Approach 1:
The patent uses a composite coating structure containing both thermochromic pigments embedded in a non-stick coating matrix. This composite material combines the functional properties of thermochromic indicators with the durability and non-stick characteristics of the coating, ensuring both reliable temperature monitoring and long-term durability for repeated cooking cycles.
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 offers a clear and durable thermal indicator that easily distinguishes temperature changes, improving user understanding and longevity of the coating, ensuring safe and efficient cooking while maintaining environmental sustainability.
Implementation Method 1
a pigment composition comprising at least one compound of formula (I) in the form of particles: Y (3-x) M x Fe (5-y) Q y O 12... presenting a reversible variation in optical and/or colorimetric properties when the coating is subjected, in part or in whole, to a temperature variation between a cold temperature and a hot temperature
Data Source
Figure 1~3
AI summary
The present invention relates to an anti-adhesive coating comprising at least one functional decorative layer, comprising a pigment composition having a reversible variation of optical and/or colorimetric properties when the coating is subjected to a temperature variation between a cold temperature of 0°C to 40°C and a hot temperature of 80°C to 400°C. Also according to the invention, the pigment composition comprises at least one compound of formula Y (3-x)MxFe (5-γ) QyO12 in the form of particles, in which M is selected from the lanthanides, alkaline metals, alkaline-earth metals and metalloids with a degree of oxidation (DO) +3; Q is selected from the group made up of the lanthanides, non-metals with degree of oxidation +4, metals with DO +3 or +4, transition metals with DO +2 or +4, alkaline-earth metals and alkaline metals; and wherein x is between 0 and 0.3 and y is between 0 and 3.