热电子发射

The best melting temperature and annealing temperature were determined by analysing of differential thermal analysis curve.

本文通过分析差热曲线，确定了实验的最佳熔化温度和退火温度，测定了样品的吸收光谱和在980nmLD激发下的上转换发射光谱，研究了上转换发光强度与激光泵浦功率的对数关系，同时，测定并分析了样品的拉曼光谱和电子扫描电镜图。

The composition of the SiGe thin films were controlled by changing the ratio of the area of silicon and germanium. By changing the parameters of substrate temperature and annealing temperature, we examined the microstructure, composition, crystallinity, electrical and thermoelectric properties by field emission scanning electron microscope, X-ray photoelectric spectroscopy, secondary ion mass spectrometer, X-ray diffraction, Hall effect and Seebeck coefficient measurement.

利用改变矽锗靶材面积比例进行薄膜成份的控制，并藉由改变基板温度以及退火温度之制程参数，利用场发射扫描式电子显微镜、化学分析电子能谱仪、二次离子质谱仪、X光绕射仪、霍尔效应量测仪以及自组装之热电量测系统作为分析仪器，分别量测薄膜表面形貌、横截面、成分、结晶性质、电性以及Seebeck系数等特性。

Second, the crossing of the curves of S1 measured at various temperatures appears as an abnormality when seen with respect to the conventional behavior of thermionic emission mechanism.

第二，不同温度测量下的N2-800℃退火样品的ln-V曲线出现了交叉，从传统的电子热发射模型的角度来看，这个是反常的现象。

In electronics, a vacuum tube or thermionic valve or just valve, is a device generally used to amplify, switch or otherwise modify, a signal by controlling the movement of electrons in an evacuated space.

真空管是一种电子设备，由抽真空的容器组成，它具有发射电子的阴极（旁热式是由灯丝加热，直热式则灯丝就是阴极）和工作时通常加上高压的阳极。阴极和阳极之间，自阴极算起，第一个电极称为栅极，再增加一个电极则称为帘栅极。

The morphology, structure and ingredient as well as character of as - prepared samples were investigated by XRD, HRTEM, EDS, TG-DTA, ICP-IRIS and micro-sclerometer techniques.

利用化学镀法和无压烧结法制备Pt/Al2O3复合粉体和相应的块体材料，并对粉体及块体采用XRD、高分辩电子显微分析、能量散射谱、热重－差热分析、电感藕合等离子体发射光谱、微型硬度测试等技术对其形貌、结构、成分、性能进行研究。

The dispersity and crystallization properties of composites were studied by SEM and DSC.

采用场发射环境扫描电子显微镜和差示扫描量热仪研究了复合材料的分散性和结晶性能。

A filament that emits electrons thermionically may be disposed around the rod in close proximity to the cathode.

一发射热电子化电子的丝极在靠近阴极处安装在支撑杆周围。

The positive ions coming to the cathode provide a mechanism by which electrons come out of the metal either thermionically or by high field emission.

向阴极移动的正离子使得电子由于热离或强场发射而从金属表面逸出。

Typically, objects emit X-ray radiation as synchrotron emission (produced by electrons oscillating around magnetic field lines), thermal emission from thin gases (called bremsstrahlung radiation ) that is above 107 (10 million) kelvins , and thermal emission from thick gases that are above 107 Kelvin.

通常情况下，物体发出的X射线同步辐射发射（电子振荡所产生的磁场线左右），热气体排放的薄是上述107 （ 10万美元） kelvins和热气体排放的厚的上述107开尔文。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。