国产午夜福利精品一区,亚洲无码av在线免费观看,久久久久国产精品999蜜,欧美日本国产成人在线

產(chǎn)品列表PRODUCTS LIST

首頁 > 測試服務(wù) > TC3000 Thermal Conductivity
TC3000 Thermal Conductivity
點擊次數(shù):1800 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. 

 
买车| 灵川县| 普宁市| 双城市| 兰溪市| 离岛区| 永昌县| 牟定县| 东山县| 安宁市| 鱼台县| 惠东县| 济阳县| 苗栗县| 长沙县| 晋州市| 丰顺县| 祁东县| 银川市| 乌鲁木齐县| 正蓝旗| 邛崃市| 天峨县| 班玛县| 志丹县| 甘孜| 浙江省| 遵化市| 高要市| 吉林省| 中江县| 郧西县| 青岛市| 枣阳市| 杨浦区| 腾冲县| 长宁县| 南充市| 错那县| 茶陵县| 雷州市|