2017年12月25日 · A multilayer insulation material (MLI) is a type of high-performance insulator for satellites and spacecraft which uses multiple radiation-heat transfer barriers to retard the flow of energy. Individual radiation barriers usually are thin polymer foils with vapour-deposited metal on one or both sides [1] , [2] , [3] , [4] .

本文提出了从耦合矩阵中提取 TEM 网络参数的理论公式。 除了谐振器耦合之外，还考虑了实现外部耦合的电路。 研究了最常见的耦合技术，即平行耦合半波长谐振器和端部耦合半波长谐振器，并推导出适当的设计方程。 所考虑的滤波器设计方法允许在耦合谐振器的电磁分析之前引入设计滤波器的等效电路。 这反过来又提供了对设计过程的更好控制，并允许在逐步控制滤波器响应的同时逐步设计滤波器。 此外，知道等效电路，可以使用已知的方法，例如耦合线段设计，在计算谐 …

2020年9月9日 · MLI는 복사 및 전도 열 전달을 차단하여 위성의 열제어를 목적으로 사용되며, 여러 층의 마일라(Mylar)나 캡톤 필름으로 이루어져 있는데, 필름의 단면 또는 양면에 알루미늄 처리를 하고, 그 사이에 접촉열 전달 억제를 위해 dacron screen, tissu-glass와 같은 spacer를 ...

Simulator of a Transmission Electron Microscope (TEM) optimized for imaging of biological specimen. Implemented in MATLAB using the DIPimage Toolbox for MATLAB. Adapted by Yue Zhang and Ruben Tammaro from the code of Vulovic et al., 2013 (https://doi.org/10.1016/j.jsb.2013.05.008).

2025年2月4日 · With innovative sample designs developed over the past decades, advanced in situ TEM has enabled emulation of battery operation conditions to unveil nanoscale changes within electrodes, at interfaces, and in electrolytes, rendering it a unique tool to offer unequivocal insights of battery materials that are beam-sensitive, air-sensitive, or ...

Specifically, the MLI was prepared by film dispersion and membrane extrusion method, and their morphology and particle size were characterized using transmission electron microscopy (TEM) and...

2024年12月11日 · tem的成像模式主要包括明场像和暗场像，主要用于观察样品的形貌特征。 高分辨透射电子显微术 （HRTEM）能够提供原子尺度的清晰图像，而 选区电子衍射 （SAED）则用于分析样品的晶体结构和相信息。

透射电子显微镜（TEM）允许我们深入材料的原子结构，但要捕获那完美无瑕的图像，关键在于精确操控一系列参数。 今天，让我们揭开TEM使用中的迷雾，简明地探究如何精通这项技术，确保每次都能获得清晰、准确的微观视界。 样品种类. 适用样品： TEM可以用于观察各种类型的材料，包括金属、半导体、陶瓷、生物样本、聚合物以及纳米结构。 这种多样性使得TEM成为研究材料科学、生物学和纳米技术等领域的重要工具。 样品厚度： 为了使电子束能够透射样品并产生图 …

2023年4月22日 · An analytical method for visualizing microscopic structures is transmission electron microscopy (TEM). TEM can magnify nanometer-size objects up to 50 million times, revealing astonishing detail at the atomic scale in contrast to optical microscopes, which only use light in the visible spectrum.

This paper introduces a cryogen-free high vacuum multi-layer insulation material(MLI) measurement system based on a G-M cryocooler, which uses the steady-state axial heat flux method for heat measurement.