Flexible Ceramic Electret Structure for Durable Flexoelectric Response
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Solution Overview
Problem
Existing solid materials exhibit limited practical applications of the flexoelectric effect, with most examples using polymer thin films, and there is a need for development of solid materials capable of effectively demonstrating this effect.
Innovation Solution
A structure comprising a flexible ceramic electret portion with a ceramic component, including a charge retaining ceramic portion and an internal electrode, combined with a flexible member outside the electret portion, to enhance the flexoelectric performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polymer thin films are used to demonstrate the flexoelectric effect, then the flexoelectric effect can be observed, but the durability and weather resistance are insufficient
Solution Approach 1:
The patent changes the material parameter from polymer to ceramic, fundamentally altering the material properties to achieve better durability and charge retention. The ceramic material inherently provides superior weather resistance and stability compared to polymer thin films, directly resolving the reliability issue while maintaining flexoelectric functionality.
Solution Approach 2:
The patent creates a composite structure combining ceramic electret portion with flexible support materials. This composite approach integrates the high durability and charge retention of ceramic materials with the flexibility needed for practical applications, achieving both reliability and functional performance simultaneously.
2Reliability
If solid materials are used instead of polymer thin films, then durability is improved, but the flexoelectric coefficient is reduced
Solution Approach 1:
The patent optimizes ceramic material parameters including composition, density, and microstructure to achieve high flexoelectric coefficients. By carefully controlling sintering conditions and material composition, the patent demonstrates that ceramic materials can maintain high flexoelectric response while providing superior durability compared to polymers.
Solution Approach 2:
The patent creates regions of high strain gradient within the ceramic structure to locally enhance the flexoelectric effect. By designing the ceramic component geometry and electrode configuration to concentrate strain gradients in specific regions, the patent maximizes the flexoelectric coefficient in critical areas while maintaining overall structural durability.
3Reliability
If a flexible ceramic electret structure is created, then weather resistance is enhanced, but the device complexity increases
Solution Approach 1:
The patent divides the device into distinct functional segments: a flexible support structure and a ceramic electret portion. This segmentation allows each component to be optimized independently for its specific function while simplifying the overall manufacturing process and assembly procedures.
Solution Approach 2:
The patent integrates the ceramic electret portion within the flexible support structure, creating a nested configuration where the ceramic component is embedded in or attached to the flexible substrate. This nesting approach consolidates multiple functions into a compact unit, reducing overall device complexity while maintaining weather resistance.
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 proposed structure achieves improved flexoelectric performance by increasing the flexoelectric coefficient, maintaining electric charge in harsh environments, and providing enhanced durability and weather resistance.
Implementation Method 1
a flexoelectric effect is an electric polarization phenomenon that occurs in proportion to the rate of spatial change in strain of a material, that is, 'strain gradient'
Implementation Method 2
a flexible ceramic electret portion containing a ceramic component, the flexible ceramic electret portion including a charge retaining ceramic portion
Data Source
AI summary
A flexoelectric structure that includes a flexible ceramic electret portion containing a ceramic component, the flexible ceramic electret portion including a charge retaining ceramic portion and an internal electrode positioned at an internal location of the charge retaining ceramic portion; and a flexible member outside the flexible ceramic electret portion.