熱伝導

• 読み: ねつでんどう
• ローマ字: netsudendō
• 漢字の分解: 熱 (netsu/atsu-) — heat; 伝 (den/tsuta-) — transmit; 導 (dō/michibi-) — guide, conduct
• 発音: /ne.tsɯ.de.ɴ.doː/

意味

Thermal conduction; the transfer of heat through a material from a region of higher temperature to one of lower temperature by direct particle interaction.

A noun (also suru-verb) covering one of three mechanisms of heat transfer, alongside 対流 (convection) and 輻射 (radiation). 熱伝導率 (thermal conductivity, λ) quantifies how efficiently a material conducts heat. High conductors include metals; low conductors (insulators) include wood, air, and aerogel. Applications range from cookware design to building insulation and CPU cooling.

例文

1. 金属の熱伝導率は木材や空気と比べてはるかに高く、触れると冷たく感じる。
2. ヒートシンクは熱伝導を利用してCPUから発生する熱を効率よく放散する。
3. 断熱材は熱伝導を最小限に抑えることで建物のエネルギー効率を向上させる。

使い方ガイド

場面: physics, materials science, engineering, building science

トーン: neutral

起源と歴史

Compound of 熱 (netsu — heat) and 伝導 (dendō — conduction, transmission). 伝導 itself combines 伝 (transmit) and 導 (lead, guide), giving the full meaning 'leading heat through a substance'.

文化的背景

時代: Modern

世代: Students and professionals

社会的背景: Technical