Microwavable Dish with Nanoparticle Coating for Even Browning
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Solution Overview
Problem
Microwave ovens lack the 'browning effect' achieved by traditional ovens, and existing microwavable dishes with coatings often result in uneven cooking with unwanted browning in some areas and undercooked regions.
Innovation Solution
A microwavable dish with a microwave-absorbing, nanoparticle coating applied to a concave dome portion and projecting nubs, designed to resonate with microwave frequency, providing even heat distribution and cooking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a microwave-absorbing coating is applied to the bottom or back side of the microwavable dish, then the dish can heat from the outside similar to a traditional oven, but the food often has unwanted browning in some areas while leaving other parts uncooked
Solution Approach 1:
The coating is segmented into multiple discrete nanoparticles (iron oxide, aluminum, titanium dioxide) with different microwave absorption characteristics. These nanoparticles are distributed throughout the coating layer rather than applied as a uniform continuous layer, allowing different regions to absorb microwave energy at different rates and achieve more uniform overall heating
Solution Approach 2:
The coating provides locally varied microwave absorption properties through the distribution of different nanoparticle types and concentrations. This creates zones with different heating characteristics that compensate for positional variations, ensuring uniform heat distribution across the entire cooking surface without requiring precise coating application
2Productivity
If a microwave-absorbing coating is applied to heat the dish from outside, then cooking speed improves, but the cooking uniformity deteriorates with uneven browning
Solution Approach 1:
The coating's microwave absorption parameters are varied through the inclusion of multiple nanoparticle types (iron oxide, aluminum, titanium dioxide) with different absorption coefficients. This creates a gradient of absorption characteristics that balances the heating rate across different areas, maintaining fast cooking speed while achieving uniform temperature distribution
Solution Approach 2:
The coating is a composite material containing multiple types of nanoparticles (iron oxide, aluminum, titanium dioxide) embedded in a binder. This composite structure provides varied microwave absorption properties within a single coating layer, enabling simultaneous fast heating and uniform temperature distribution across the dish surface
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 dish achieves quick and even heating of food, reducing cooking time and power requirements while minimizing uneven browning, ensuring uniform cooking.
Implementation Method 1
a microwave-absorbing, nanoparticle coating applied to at least a portion of the dome portion
Implementation Method 2
The absorption helps to heat the microwavable dish so that the food in the microwavable dish can be heated from the outside
Implementation Method 3
designed to resonate with microwave frequency, providing even heat distribution and cooking
Implementation Method 4
a top having a surface adapted to hold a food item and to reflect microwaves
Data Source
AI summary
A microwavable dish having a body with a microwave-absorbing coating. A bottom of the microwavable dish or the microwave-absorbing coating defines or includes a dome portion. The microwave-absorbing coating can be coupled to or formed with the bottom of the microwavable dish. The microwave-absorbing coating provides heat to the body by transforming microwaves to heat. The microwave-absorbing coating can include a plurality of nubs, where each nub has a height and a nub diameter.