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Accelerators in concrete serve as admixtures to speed up the hardening process, enabling the concrete to achieve early strength faster. Although accelerators do not necessarily impact the time it takes concrete to set, they reduce this time in practice. A common accelerator is calcium chloride, which is particularly useful for hastening early strength development in cold weather or for rapid repair jobs that require quick heat generation after mixing.
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Vertical curves are essential in roadway design because they provide smooth transitions between varying roadway grades. Designing vertical curves involves calculating intermediate elevations and identifying the curve's highest or lowest point, which is essential for optimal roadway performance.Intermediate elevations on a vertical curve are determined using the tangent offset method. This method considers the initial elevation at the start of the curve, the grades, and the curve's geometry. The...
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Updated: Feb 13, 2026

Esophageal Heat Transfer for Patient Temperature Control and Targeted Temperature Management
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ナノイオン学は,750°C以上の高温で質量移転を劇的に加速する.

Yun Chen1, Cesar-Octavio Romo-De-La-Cruz1, Fuming Jiang1

  • 1Department of Mechanical, Materials, and Aerospace Engineering, West Virginia University, Morgantown, West Virginia 26506, United States.

ACS nano
|February 12, 2026
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まとめ

安定したナノイオニクスは,高温装置のための原子層堆積 (ALD) を使用して開発されました. これらのナノイオニックは,導電性と熱安定性が著しく向上し,固体酸化素細胞 (SOC) の以前の制限を克服しています.

キーワード:
原子層の沈殿は,原子層の沈殿である.導電性 導電性について温度上昇による高温.インターフェース インターフェース質量移転 (Mass Transfer) とは,質量移転 (Mass Transfer) を意味する.ナノイオン学 ナノイオン学リバーシブル固体酸化物細胞

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科学分野:

  • 材料科学 材料科学とは
  • ナノテクノロジー ナノテクノロジー
  • 電気化学 電気化学について

背景:

  • ナノイオニックは,伝統的に,500°C以上の熱的不安定性によって制限されていました.
  • 以前の研究では,ナノイオニクスは高温アプリケーションでは実現不可能であると判断されていました.

研究 の 目的:

  • 様々な酸化物から熱的に安定したナノイオニクスを作るための設計原理を確立する.
  • ナノイオン伝導性と安定性を高めるための実用的な方法を実証する.

主な方法:

  • テストプラットフォームとして,可逆固体酸化物細胞 (SOC) を利用しました.
  • 原子層堆積 (ALD) によるナノイオニクスを実装して,コンフォームフィルムを作成します.
  • ナノグラインで表面ナノイオニクスを形成するためのインターフェース制御アプローチ.

主要な成果:

  • 導電性が7桁高いナノイオニクスを達成しました.
  • 卓越した熱安定性を証明し,750°Cで500時間,850°Cで1000時間稼働しています.
  • 粒子の大きさ ~15 nm の均一なナノイオンフィルムは,長時間電気化学操作後に適合性を維持しました.

結論:

  • 安定した高性能ナノイオニクスのための設計原理を開発しました.
  • ALDは,極端な条件に適した堅固なナノイオン材料を作成するための実行可能な方法を提供します.
  • この研究は,高温デバイスにおけるナノイオニクスのための新しい枠組みを提供します.