欧美日韩一区-欧美日本黄色-国产精品免费久久久免费-www.sese五月天-国产精品亚洲欧美云霸高清-考逼网站-欧美日韩一级久久久久久免费看-亚洲精品欧美精品日韩精品-男女久久久国产一区二区三区-中文字幕精品无码亚洲字幕成氓人-亚洲精品无码久久久久久久久-妈妈的职业电影

產(chǎn)品列表PRODUCTS LIST

首頁 > 測試服務 > TC3000 Thermal Conductivity
TC3000 Thermal Conductivity
點擊次數(shù):2039 更新時間:2014-09-01

 

Thermal conductivity measuring methods can be divided into steady-state method and non-steady-state method by macroscopic mechanism of thermal conductivity. 

Steady-state method requires long period ,and there are also many other factors which affect measuring accuracy. However, non-steady-state method has the advantage of short measuring time, high accuracy and low requirements for operational environment. Especially, the transient hot-wire method has been considered internationally as the best measuring method of thermal conductivity in the research area of thermal conductivity.

 

Measuring Principle

The origin of hot-wire method could be traced back to the year 1780 when an American scientistJoseph Priestley made the first experiment about heat transfer ability of air. In 1931,Stâlhane and Pyk, who are the first to adopt transient hot-wire method in measuring the thermal conductivity of solid, powder and liquid,  Hot-wire method is now widely used in gas, liquid, solid, metal fusion and so on.