Shanghai Daoqin Plastics Co., Ltd.

         front 言本文以 thermally conductive filler is 主线, for metal, metal oxidation material, nitrogen material, carbon material and other function filler improvement plastics thermal properties research 状况进行综述. in addition, also introduction filling composite/compounding type thermally conductive plastics in LED 灯, pipe/tube and hot device and other field/area application 进展.

        填 material types type

        1, metal

         metal is hot 良导体, main/primary 依靠自由 electronics achieve hot 传导, its 声振效应 引起 hot can 忽略.

         a small amount of metal add 入基体 in, can large degree improve/increase composite/compounding material thermally conductive and conductive property can, in non insulation combined important 位置.

        2, metal oxidation material

         metal oxidation material large more is insulation 体, main/primary is 靠声子 thermally conductive machine 理 achieve hot 传导. and metal versus ratio, its oxidation material hot rate although high, 但 price separation low 廉, a large amount of filling to polymer in can to thermally conductive 效果.

         commonly used metal oxidation material filler:

        ▷▷ Al2O3: types very commonly used thermally conductive filler, versus for/regarding polymer material tool has relatively high hot rate, relatively good electrical property can and versus for low price.

        ▷▷ MgO: versus for/regarding Al2O3, MgO in gas in easy 吸潮, increase property relatively strong/high, can a large amount of filling, resistant acid property 差, very easy by acid 腐蚀, therefore made its in acid property ring in application. is, using/adopting and hot rate relatively high nitrogen material methods, a small amount of filling MgO, can reduce composite/compounding material cost.

         in high powder filling 时, melt degree increase large, processing relatively difficult, ZnO increase property relatively MgO low, will its filling to nylon (PA)6 in, made thermally conductive plastics tool has more high hot rate and processing flow property. modified rear ZnO separation is 25% 时, composite/compounding material hot rate to 1.05 W/(m·K).

        3, nitrogen material

         versus for/regarding metal oxidation material, metal nitrogen material hot rate high, 线膨胀系数 low, high temperature resistance, electrical insulation property good tool has relatively good electrical property can, used as electrical 子陶瓷基 sheet/plate and thermally conductive 封装材 material, is type very has force thermally conductive filler, 但 its disadvantages is price relatively 贵, this in 一定程 degree upper made it in thermoplastic material in application.

         commonly used nitrogen material has nitrogen aluminum (AlN), BN and nitrogen silicon (Si3N4), it tool has internal structure, a small amount of add can to relatively high hot rate.

        4, carbon material

         Common carbon material main/primary has carbon silicon (SiC) and 石墨, it hot rate high, price versus for low 廉, is made thermally conductive material filler.

        SiC tool has good heat stabilized property, hardness high, 线膨胀系数 low.

        石墨 hot 传导载体 is electronics and 声子, 两者 协同 function make its tool has very high hot rate, and metal most is 接近.

        由 upper type filler features can 见, different types type thermally conductive filler has excellent disadvantages, for plastics thermal properties improvement 效果也不尽 same. this requirements research separation understanding various filler property can, and according to research direction, selection combined thermally conductive filler and 基体进行 filling, most make thermally conductive composite/compounding material tool has good comprehensive property can.

        导 hot plastics application LED

         thermally conductive plastics can substitute/replace metal parts application to LED in, 例如: 灯 base/seat, cooling dispersion hot 灯杯, outer housing/shell, dispersion hot device, sheet/plate, device, parts and other.

         this not only can metal in poor ring in easy 发生腐蚀 and 结垢, make tool heavy, molding difficult and other issues, but also can make LED dispersion hot uniform, decrease/reduce parts high temperature formed deformation, from long tool use lifespan, also can reduce 运输, cost.

         thermally conductive pipe/tube

         versus for/regarding made, iron made and other metal pipe/tube, plastics pipe/tube tool has corrosion resistant property strong/high, light, safety, water retardant force small, for water 质PH value requirements and other advantages, in upper lower water pipeline, gas pipeline, sheet/plate pipeline and hot and other industry in application.

        但 is, plastics hot rate low, through reduce pipeline thick or increase large pipeline long degree and surface methods improve/increase thermally conductive efficiency, 会导致 tube/pipe 道 strong/high degree reduce increase cost.

        计算知: plastics tube/pipe hot rate ≥ 1 W/(m·K)时, in hot system in, thermally conductive tube/pipe ratio tube/pipe mono tube/pipe long hot can force in 冬夏季 made cold made hot as lower improve/increase degree large 于15%. therefore, in hot engineering in, using/adopting thermally conductive plastics tube/pipe tool has more obvious 经济效益 and 社会效益.

         therefore, improve/increase plastics pipe/tube hot rate, is resin, can 源, reduce cost has measures.

        换 hot device

        换 hot device is can force, chemical industry, food processing and other industry core equipment, in industrial production in has important 位.

        传统 换 hot device 都 is pure metal and alloy processing formed, it easy by 腐蚀而 add heavy industrial production property, formed heavy loss 失.

         polymer hot device is use polymer material 代替传统 metal made 备 换 hot device, to 越 越 more research heavy 视.

        石墨 dispersion hot sheet/slice is types new material, it is through hot separation understanding in polymer/macromolecule film upper formed 一层石墨 crystallization 层, tool has high hot rate, also tool has good soft/flexible property. 实验 table/sheet 明, dispersion hot sheet/slice can will hot amount fast speed and dispersion hot, dispersion hot is metal copper (Cu) and aluminum (Al) above.

         other 方面

         thermally conductive plastics not only can application in LED, thermally conductive pipe/tube and hot device in, its tool has excellent force property can and thermal properties more is aviation aerospace field/area 必不 can less key/critical parts. especially is carbon thermally conductive material more is most year most tool has outlook/prospects material 之一.

         high ultra- 声 speed device long time 飞行驻点 temperature degree high, need high thermally conductive material and for hot amount 进行转移, from increase device stability property;

        空间飞行 device large thin sheet/plate structure, solid 体火箭发动 machine tube/pipe and other 部位, requirements material tool has light, hot rate high, force property can good and other excellent comprehensive property can;

         another, in large type machine, 笔记本 electrical CPU and 随 民 use electrical appliances plant/unit property can improve/increase, parts degree improve/increase, make system generate hot amount increase.

         this hot amount can and 时导出, electronics device parts positive as and system stability property 就会受 to heavy effect/influence.

        结语

         filling type thermally conductive plastics research and application very more, metal filler already by metal oxidation material, nitrogen material and carbon material 取代, using/adopting different methods and different 基体复配 rear in 一定程 degree upper 都发挥 各自 advantages, 取 一 formed 果. in LED 灯, thermally conductive pipe/tube and hot device and its it application in, thermally conductive plastics to important function.

         currently, thermally conductive plastics application industry 越 越 more, market for/regarding tool has excellent force property can and high thermally conductive material demand 也越 越 large.

         therefore, development new type thermally conductive filler, different types type filler for improvement composite/compounding material thermal properties and application areas to high degree heavy 视, and solution, meet/satisfy 现代科学 technology and development need.