Transducer Dielectric Layer Balancing Flexibility and Dielectric Constant
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Solution Overview
Problem
Existing dielectric layers in transducers face challenges in achieving a high dielectric constant and flexibility, which are essential for efficient conversion of mechanical and electrical energy, as they either have high elastic modulus or low relative dielectric constants.
Innovation Solution
A dielectric layer comprising a urethane elastomer, ionic liquid, and cyclic multidentate ligand, where the urethane elastomer has specific structural features and the ionic liquid and ligand form a complex to increase the relative dielectric constant and maintain flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If barium titanate particles are used to increase the relative dielectric constant, then the dielectric constant is improved, but the elastic modulus becomes high and flexibility is reduced
Solution Approach 1:
The patent changes the chemical composition parameters of the dielectric layer by using urethane elastomer with specific molecular structures (containing cyclic multidentate ligand structures, cationic structures, or anionic structures) instead of traditional barium titanate particles. This parameter change achieves high dielectric constant (≥8.0) while maintaining low elastic modulus and high flexibility, resolving the contradiction between dielectric performance and mechanical flexibility.
2Ease of operation
If only flexible urethane foam is used, then flexibility is improved, but the relative dielectric constant becomes low
Solution Approach 1:
The patent creates a composite material system by incorporating ionic liquids and/or cyclic multidentate ligands into the urethane elastomer matrix. This composite approach combines the flexibility of urethane elastomer with the high dielectric properties of ionic liquids and cyclic multidentate ligands, achieving both high flexibility and high relative dielectric constant (≥8.0) simultaneously.
3Measurement precision
If the dielectric layer thickness is increased to improve sensitivity, then the sensitivity is improved, but the conversion efficiency is reduced
Solution Approach 1:
The patent changes the dielectric constant parameter of the dielectric layer to at least 8.0, which fundamentally alters the relationship between thickness and performance. With this high dielectric constant, the layer can maintain high conversion efficiency even at thin dimensions (1 μm to 1 mm), and sensitivity can be optimized through electrode configuration rather than simply increasing thickness, thus resolving the contradiction between sensitivity and conversion efficiency.
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 dielectric layer achieves a relative dielectric constant of at least 8.0, enhancing the conversion efficiency of electrical and mechanical energy while maintaining flexibility, suitable for transducer applications.
Implementation Method 1
A transducer including a dielectric layer and at least two electrodes holding the dielectric layer therebetween has been applied in various fields as an element that mutually converts electrical energy and mechanical energy with high conversion efficiency utilizing deformation (expansion and contraction) of the dielectric layer
Implementation Method 2
a difference in potential is applied between the pair of electrodes to generate stress in the dielectric layer, which makes it possible to function as an actuator
Data Source
AI summary
A transducer, the transducer includes a dielectric layer, in which the dielectric layer has a relative dielectric constant of 8.0 or more at a frequency of 1 kHz, and the dielectric layer includes a urethane elastomer, a structure of a cyclic multidentate ligand, an anionic structure, and a cationic structure.