共查询到18条相似文献,搜索用时 125 毫秒
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1、什么是电热膜供暖系统 低温辐射电热膜供暖系统又称“嵌入式供暖系统“,简称电热膜,是世界上先进的供暖方式之一,它是一种以电力为能源,通过红外线辐射进行传热的新型供暖方式。低温辐射电热膜供暖系统的主体是电热膜,它是一种通电后能发热的半透明聚酯薄膜。由可导电的特制油墨、金属载流条经印刷、热压在两层绝缘聚酯薄膜间制成的一种特殊的加热元件。 相似文献
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高温红外电热膜的制备与特性研究 总被引:1,自引:0,他引:1
采用蒸镀法制备掺杂的二氧化锡电热膜,并研究了溶液成分,掺杂浓度对电热膜的电
阻、电阻温度特性以及红外辐射性能的影响,得到电阻性能稳定且发射率高的高温红外电热膜。 相似文献
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电热膜作为一种新型电加热元件,在电热电器中有广泛应用.本文介绍了电热膜的种类与性能参数,较详细地分析了如何根据不同的应用条件选择应用电热膜. 相似文献
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SnO2电热膜的老化和失效 总被引:1,自引:0,他引:1
在几种不同的衬底上制作SnO_2电热膜,研究了它的电阻温度特性、老化特性和失效机理。指出膜层缺陷浓度的变化、内应力的均匀化以及膜层与衬底间可动离子的扩散,是产生SnO_2电热膜老化的主要原因。提出了改善电热膜老化的措施。电热膜的失效属于早期失效,设计电热膜时,合理分配膜承受的功率密度,制作过程中保证膜的均匀性,选择适当的衬底材质和几何形状,可避免这种早期失效。 相似文献
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Using a thermolptastic film containing flake-like colloidal particles an optical transparency can be produced by heating the film while applying a pattern of electric fields to locally orient the particles. These fields can be controlled by an adjacent photoconductive layer, allowing an input optical image to be recorded. 相似文献
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采用溶胶包裹再凝胶工艺制备了C-2CH复合型PTCR薄膜。实验表明,这种材料的PTC效应是由2CH的相变体膨胀引起的,C的粒径大小对复合薄膜PTC特性有十分显著的影响。较高的热循环温度和较多的热循环老化次数使PTCR薄膜电性能重现性得以改善。 相似文献
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2D Janus Hybrid Materials of Polymer‐Grafted Carbon Nanotube/Graphene Oxide Thin Film as Flexible,Miniature Electric Carpet 下载免费PDF全文
Peng Xiao Changjin Wan Jincui Gu Zhenzhong Liu Yonghong Men Youju Huang Jiawei Zhang Liqiang Zhu Tao Chen 《Advanced functional materials》2015,25(16):2428-2435
Ultrathin, freestanding polymer hybrid film with macroscopic sizes and molecular thicknesses have received significant interest due to their applications as functional devices, microsensors or nanoactuators. Herein, a 2D Janus hybrid of polymer‐grafted carbon nanotubes/graphene oxide (CNTs/GO) thin film is fabricated using microcontact printed CNTs/GO as photo active surface to grow polymer brushes by self‐initiated photografting and photopolymerization selectively from one side of CNTs/GO film. This achieved 2D Janus hybrid materials with grafted polymer layer as insulative carpet and supported CNTs/GO thin film as conductive element have the potential application as flexible and miniature electric carpet for heating micro‐/nano devices locally. 相似文献
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The analysis of dynamic temperature changes in microelectronic layered circuit (especially made in thick-film technology) has been presented in the paper. Such transient states are caused by electric pulse with high energy and short time of duration. It leads to short but the very violent temperature increase and - as result - defects or parameter changes of active layer. The mathematical function which describes the instantaneous temperature changes was presented in this paper in order to provide more accurate analysis of reliability and thermal properties measurement problems.The two-layer structures (with different thermo-physical properties) were the subject of conducted research, especially one of them, namely heat source excited by electric pulse. Such configuration is typical for microcircuits made in hybrid technology such as LTCC (low temperature co-fired ceramic), HTCC (high temperature co-fired ceramic) as well as thick - film technology in which polymer and photoimageable (photosensitive) materials are used. 相似文献
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传统的微波源主要由行波管、磁控管、返波管等电真空器件实现,但因其工作电压高、功耗大、体积大,导致在使用安全性、利用效率和便携性等方面存在不足。而微波固态源由于具有效率高、谐波抑制性能好、稳定性高等优点,正逐步替代传统微波源,有着很好的发展空间。设计了一种紧凑型大功率微波固态源,采用锁相环作为信源,通过三级功放级联对微波信号进行逐级放大,最终输出频率为915 MHz、功率为300 W 的微波信号。测试结果表明该固态源的工作效率≥70%,二次谐波抑制≤-40 dBc,三次谐波抑制≤-50 dBc。该设计在微波加热和解冻等方面具有很好的应用前景。 相似文献