日立 HITACHI S-3700N用途：适用于金属、陶瓷、高分子、半导体等多种材料的微观结构观察，可对材料微区化学成分进行定性与半定量检测，还能用于粉末、微粒纳米样品形态和粒度测定以及复合材料界面特性研究。可观察大件、较重、较高的样品，能对高达 110mm 的样品进行观察和能谱分析。技术原理：通过电子枪发射电子束，经加速电压加速后，利用磁透镜聚焦到样品表面，在偏转线圈作用下进行光栅扫描。电子与样品相互作用产生二次电子、背散射电子等信号，探测器收集转化为电信号并放大成像。该设备具备 VP 模式，通过向样品室灌入特定压力气体，利用气体分子产生的正离子消除荷电，实现不导电样品直接观测。性能：分辨率方面，3kV 时为 10nm，30kV 时为 3nm；放大倍率通常为 30 - 60,000 倍；加速电压可调节；拥有特大型样品室，可装载直径达 300mm、高度 110mm 的样品，还能同时安装 EDX/WDX/EBSD 等配件；配备 5 轴马达驱动样品台，具备优中心倾斜、旋转等功能；具有实时信号混合功能，可同时显示两个不同检测器观测到的样品信息；标准配备涡轮分子泵，创造清洁干燥真空条件 。Product Name: Hitachi HITACHI S-3700NPurpose: It is suitable for observing the microstructures of various materials such as metals, ceramics, polymers, and semiconductors. It can perform qualitative and semi - quantitative detection of the chemical composition in the micro - areas of materials, and is also used for determining the morphology and particle size of powder and nanoparticle samples, as well as studying the interface characteristics of composite materials. It can observe large, heavy, and tall samples, and can observe and perform energy - spectrum analysis on samples up to 110mm in height.Technical Principle: An electron beam is emitted by the electron gun, accelerated by the acceleration voltage, focused on the sample surface using a magnetic lens, and raster - scanned under the action of a deflection coil. The electrons interact with the sample to generate signals such as secondary electrons and backscattered electrons. The detector collects and converts these signals into electrical signals, which are then amplified and imaged. This device has a VP mode. By filling the sample chamber with gas at a specific pressure, positive ions generated by gas molecules are used to eliminate charging, enabling the direct observation of non - conductive samples.Performance: In terms of resolution, it is 10nm at 3kV and 3nm at 30kV. The magnification is usually 30 - 60,000 times. The acceleration voltage is adjustable. It has an extra - large sample chamber that can load samples with a diameter of up to 300mm and a height of 110mm, and can also install accessories such as EDX/WDX/EBSD simultaneously. It is equipped with a 5 - axis motor - driven sample stage with functions such as eucentric tilt and rotation. It has a real - time signal mixing function that can simultaneously display sample information observed by two different detectors. It is equipped with a turbo - molecular pump as standard to create a clean and dry vacuum condition.