纳米材料在汽车发动机机油中的应用

论述了纳米材料添加在汽车发动机机油中的摩擦学性能和机理,为发展我国高性能的汽车发动机机油提供有效途径。     

纳米车用技术方兴未艾

所谓纳米,是一个计量单位。我们知道,1米=1000毫米,而1毫米=1000000纳米,1纳米则相当于10个氢原子一个挨一个排起来的长度,这么微小再微小的空间,实际上就是组成物质的基本单位原子和分子的空间。自从20世纪80年代初发明了电子扫描隧道显微镜后,世界就诞生了一门以纳米作单位的     

Nc-Si Thin Film Deposited at Low Temperature and Nc-Si Heterojunction Solar Cell

This paper reported some results about intrinsic nanocrystalline silicon thin films deposited by high frequency (HF) sputtering on p-type c-Si substrates at low temperature. Samples were examined by atomic force microscopy (AFM), X-ray diffraction (XRD), infrared absorption, and ellipsometry. XRD measurements show that this film has a new microstructure, which is different from the films deposited by other methods. The ellipsometry result gives that the optical band gap of the film is about 2.63 eV. In addition, the n-type nc-Si :H/p-type c-Si heterojunction solar cell, which has open circuit voltage (Uoc) of 558 mV and short circuit current intensity (Isc) of 29 mA/cm^2, was obtained based on the nanocrystalline silicon thin film. Irradiated under AM1.5, 100 mW/cm^2 light intensity, the Uoc, Isc, and FF can keep stable for 10 h.     

远红外线技术应用

近五十年来,红外技术已成为一门迅速发展的新兴技术,它广泛应用于各个领域。在军事上,红外雷达、制导、侦察、通讯、夜视、对抗。引爆、伪装遍布各军兵种;在遥远遥测方面,卫星云图、气象资料地球资源,水文地质、环境污染、预警卫星、反导系统;在热象测温上,高中低测温仪,热象仪,已在医疗卫生、交通运输、电力石     

粉末渗锌技术及其应用

利用粉末渗锌技术进行钢铁防腐可以弥补喷镀锌、电镀锌、热浸镀锌等工艺的缺陷，还可解决镀件氢脆现象，同时粉末渗锌的加热过程可对镀件产生回火效应，并不会对镀件产生不利影响。粉末渗锌工艺简单实用，可用于多种用途，易于推广。