In view of the limitations of solid metal heat sink in the heat dissipation of high power light emitting diode （LED）, a kind of miniaturized phase change heat sink is developed for high power LED packaging. First, t...In view of the limitations of solid metal heat sink in the heat dissipation of high power light emitting diode （LED）, a kind of miniaturized phase change heat sink is developed for high power LED packaging. First, the fabrication process of miniaturized phase change heat sink is investigated, upon which all parts of the heat sink are fabricated including main-body and end-cover of the heat sink, the formation of three-dimensional boiling structures at the evaporation end, the sintering of the wick, and the encapsulation of high power LED phase change heat sink. Subsequently, with the assistance of the developed testing system, heat transfer performance of the heat sink is tested under the condition of natural convection, upon which the influence of thermal load and working medium on the heat transfer performance is investigated. Finally, the heat transfer performance of the developed miniaturized phase change heat sink is compared with that of metal solid heat sink. Results show that the developed miniaturized phase change heat sink presents much better heat transfer performance over traditional metal solid heat sink, and is suitable for the packaging of high power LED.展开更多
1964年12月,江西省文管会在南昌市第一交通路基建工地清理了一座东汉砖室墓。该墓方向为正南,平面呈十字形,可分为前、中、后三室。前室长1米,宽1.16米;中室长1.06米,宽2.34米;后室长2.64米,宽1.36米。前室内高1.2米,中室内高2.24米,后...1964年12月,江西省文管会在南昌市第一交通路基建工地清理了一座东汉砖室墓。该墓方向为正南,平面呈十字形,可分为前、中、后三室。前室长1米,宽1.16米;中室长1.06米,宽2.34米;后室长2.64米,宽1.36米。前室内高1.2米,中室内高2.24米,后室内高1.38米。墓砖呈青灰色,分长方(37×18×8厘米)和刀砖(28×17×7×4.5厘米)两种。砖侧均印有简朴的 X 字几何纹(细分有四种)。封门砖呈人字形。展开更多
基金Projects(51575115,51775122)supported by the National Natural Science Foundation of China
文摘In view of the limitations of solid metal heat sink in the heat dissipation of high power light emitting diode （LED）, a kind of miniaturized phase change heat sink is developed for high power LED packaging. First, the fabrication process of miniaturized phase change heat sink is investigated, upon which all parts of the heat sink are fabricated including main-body and end-cover of the heat sink, the formation of three-dimensional boiling structures at the evaporation end, the sintering of the wick, and the encapsulation of high power LED phase change heat sink. Subsequently, with the assistance of the developed testing system, heat transfer performance of the heat sink is tested under the condition of natural convection, upon which the influence of thermal load and working medium on the heat transfer performance is investigated. Finally, the heat transfer performance of the developed miniaturized phase change heat sink is compared with that of metal solid heat sink. Results show that the developed miniaturized phase change heat sink presents much better heat transfer performance over traditional metal solid heat sink, and is suitable for the packaging of high power LED.
文摘1964年12月,江西省文管会在南昌市第一交通路基建工地清理了一座东汉砖室墓。该墓方向为正南,平面呈十字形,可分为前、中、后三室。前室长1米,宽1.16米;中室长1.06米,宽2.34米;后室长2.64米,宽1.36米。前室内高1.2米,中室内高2.24米,后室内高1.38米。墓砖呈青灰色,分长方(37×18×8厘米)和刀砖(28×17×7×4.5厘米)两种。砖侧均印有简朴的 X 字几何纹(细分有四种)。封门砖呈人字形。
