Lead-Free Piezoelectric Composition Buffer Interface
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Solution Overview
Problem
Pb(Zr, Ti)O3 (PZT)-based piezoelectric materials have high piezoelectric characteristics but contain toxic lead, leading to environmental pollution and the need for Pb-free alternatives with improved piezoelectric properties.
Innovation Solution
A Pb-free piezoelectric material composition is developed, comprising a first material, a second material within the first material, and a third material acting as a buffer between the first and second materials, enhancing the piezoelectric characteristic and minimizing inter-interface defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Pb(Zr, Ti)O3 (PZT)-based materials are used, then high piezoelectric characteristic is achieved, but environmental pollution is caused due to toxic lead
Solution Approach 1:
The patent removes toxic lead from the piezoelectric material composition while maintaining high piezoelectric characteristics through the use of buffer materials and optimized material combinations, thereby eliminating environmental pollution without sacrificing performance
Solution Approach 2:
The patent employs composite material structures combining multiple materials (first material, second material, and buffer material) to achieve both high piezoelectric characteristics and environmental sustainability by eliminating lead content
2Object-generated harmful factors
If Pb-free piezoelectric material is developed, then environmental pollution is reduced, but piezoelectric characteristic becomes low
Solution Approach 1:
The patent introduces a buffer material as an intermediary between the first and second materials to facilitate effective interaction and energy transfer, thereby maintaining high piezoelectric characteristics in the Pb-free composition
Solution Approach 2:
The patent creates a composite material system with multiple components that work synergistically to compensate for the absence of lead, achieving high piezoelectric response through optimized material combinations and interfaces
3Manufacturing precision
If buffer material is added between first and second materials, then inter-interface defect is minimized, but device complexity increases
Solution Approach 1:
The buffer material serves as an intermediary layer that mediates between the first and second materials, reducing interfacial defects and improving overall material quality while adding only moderate structural complexity
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 Pb-free piezoelectric material composition achieves a high piezoelectric characteristic, allowing for operation with low driving voltage, reduced production costs, and enhanced environmental sustainability by minimizing lead usage and associated pollution.
Implementation Method 1
a third material between the first material and the second material... The third material may be bonded to each of the first material and the second material, and may function as a buffer between the first material and the second material
Implementation Method 2
Piezoelectric materials are being widely used as materials of parts such as ultrasound vibrators, transducers, and actuators
Data Source
AI summary
A piezoelectric material composition may include a first material, a second material in the first material, and a third material between the first material and the second material. None of the first material, the second material, and the third material includes lead. The third material may be bonded to each of the first material and the second material, and may function as a buffer between the first material and the second material. The present disclosure also relates to a method of manufacturing the piezoelectric material composition, a piezoelectric device, and an apparatus including the piezoelectric device.