導熱(どうねつ)

どうねつ
noun
heat conduction; thermal conduction
science
1. heat conduction; thermal conduction
The transfer of heat through a material by direct contact between molecules, without bulk movement of the material itself. One of the three main modes of heat transfer, alongside convection and radiation.
金属(きんぞく)は導熱(どうねつ)性(せい)が高(たか)い。
Metals have high thermal conductivity.
導熱(どうねつ)率(りつ)の低(ひく)い素材(そざい)は断熱材(だんねつざい)に適(てき)している。
Materials with low thermal conductivity are suitable for insulation.
建物(たてもの)の壁(かべ)を通(つう)じた導熱(どうねつ)を抑(おさ)えることが、省(しょう)エネルギー住宅(じゅうたく)の設計(せっけい)で重要(じゅうよう)なポイントとなる。
Reducing heat conduction through building walls is an important point in the design of energy-efficient houses.

A compound of 導(どう) (conduct/guide) and 熱(ねつ) (heat). Describes the physical process by which heat moves through a material from a region of higher temperature to one of lower temperature.

Common collocations

  • 導熱(どうねつ)性(せい): thermal conductivity
  • 導熱(どうねつ)率(りつ): thermal conductivity coefficient
  • 導熱(どうねつ)材(ざい): heat-conducting material

Similar words

  • 熱伝導(ねつでんどう): heat conduction — the usual Japanese term; 導熱(どうねつ) is much less common and appears mainly in technical writing
  • 伝熱(でんねつ): heat transfer (broader term including conduction, convection, and radiation)
  • 対流(たいりゅう): convection (heat transfer through fluid movement)
  • 放射(ほうしゃ): radiation (heat transfer through electromagnetic waves)

Related Words

Compare: 熱伝導(ねつでんどう) (heat conduction)
Compare: 放射(ほうしゃ) (radiation)
general
Added 2026.5.3 9:00 · Revised 2026.9.28 14:10
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