バリウムチタナートセラミクスの実用的な高ピエゾ電気性は,広範な構造的柔軟性を持つ多相収束を使用します
Chunlin Zhao1, Haijun Wu2, Fei Li3
1Department of Materials Science , Sichuan University , Chengdu 610064 , China.
Journal of the American Chemical Society
|October 20, 2018
まとめ
研究者は超高性能の 鉛のない新型ピエゾ電気材料を開発しました バリウムチタン酸塩基のセラミックは 有毒な鉛材料の 持続可能な代替品です
科学分野:
- 材料科学
- 固体物理学
- ナノテクノロジー
背景:
- 環境への関心が高まると,鉛のないピエゾ電気材料が必要になります.
- 現在の無鉛の代替品は 鉛ベースの材料の高い性能を欠いています
- PZT-5Hのような鉛ベースのピエゾ電気ケラミックは広く使用されていますが,環境に有害です.
研究 の 目的:
- 高性能の鉛のないピエゾ電気材料を開発する.
- 電子メカニカル特性を向上させるための新段階境界工学戦略を探求する.
- 鉛ベースのピエゾ電気アプリケーションの実行可能な無鉛の代替品を提供すること.
主な方法:
- バリウムチタナート (BaTiO3) 基のセラミクスの多相収束を利用したフェーズ境界エンジニアリング戦略を採用した.
- Zコントラスト画像を用いた原子解像度の偏振マッピングを使用した.
- 理論的なシミュレーションを行い, 偏振回転の仕組みを理解した.
主要な成果:
- 700 ± 30 pC/Nの超高圧電常数 (d33) を達成した.
- 構成の広い範囲でd33>600 pC/Nを維持した.
- ナノスケールの3つの電鉄相 (T + O + R) の共存が観察され,極化回転が促進された.
結論:
- この新しい無鉛材料は,優れたピエゾ電気性能を示し,10~40°Cの範囲で多くの鉛ベースのシステムを上回ります.
- フェーズ・ボーダー・エンジニアリング戦略は,高性能の無鉛機能材料を設計するための新しいパラダイムを提供します.
- この材料は,鉛ベースのピエゾ電気材料に持続可能な代替手段を提供することで,実用的な用途に適しています.
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