>>666
https://en.wikipedia.org/wiki/Smoke_screen#Infrared_smokes
Older systems for production of infrared smoke work as generators of aerosol of dust with controlled particle size. Most contemporary vehicle-mounted systems use this approach. However, the aerosol stays airborne only for a short time.
The brass particles used in some infrared smoke grenades are typically composed of 70% copper and 30% zinc. They are shaped as irregular flakes with a diameter of about 1.7 μm and thickness of 80?320 nm.

この他に燃焼する赤リンの微細な粒子（エアロゾル）を散布してその熱でその背後にある熱源を見えないようにする技術やカーボン粒子で熱だけでなく測距レーザー光を撹乱する技術や、微細な水滴の霧で熱だけでなくレーダーのミリ波も吸収する技術も開発が進んでいる