SEM Testing Principle
When a strong electric field is applied to the sample surface, the potential barrier on the sample surface is reduced. Due to the tunnel effect, electrons inside the sample metal pass through the barrier and are emitted from the metal surface; this phenomenon is called field emission. The brightness is approximately 100 times higher than that of ordinary SEM, with a resolution of up to 10 nm.
Instrument and Technical Parameters
- Instrument Model: ZEISS Merlin Compact
- Instrument Technical Parameters:
- Secondary electron resolution: 1.4 nm (1 kV, deceleration mode)
- Magnification: x 20 ~ x 800,000
- Electron gun: Cold field emission electron source
Sample Submission Requirements and Precautions:
- Powder samples should be between 50-100 mg.
- Block samples must not exceed 5 mm in width and 5 mm in height.
- Samples with magnetism must be declared.
Testing Examples
Reference Standards
- GB/T 14593-2008: Quantitative Analysis Method for Cashmere, Wool and Their Blended Fibers by Scanning Electron Microscopy
- GB/T 16594-2008: General Rules for Scanning Electron Microscope Measurement of Micron-scale Lengths
- GB/T 17362-2008: Scanning Electron Microscope X-ray Energy Dispersive Spectroscopy Analysis Method for Gold Products
- GB/T 17722-1999: Scanning Electron Microscope Measurement Method for Gold Coating Thickness
- GB/T 20307-2006: General Rules for Scanning Electron Microscope Measurement of Nanoscale Lengths
- GB/T 25189-2010: Microbeam Analysis - Method for Determination of Quantitative Analysis Parameters of Scanning Electron Microscope Energy Dispersive Spectrometers
- GB/T 27788-2020: Microbeam Analysis - Guidelines for Calibration of Scanning Electron Microscope Image Magnification
- GB/T 30834-2022: Microbeam Analysis - Evaluation and Statistics of Non-metallic Inclusions in Steel by Scanning Electron Microscopy
- GB/T 31563-2015: Measurement of Metal Coating Thickness - Scanning Electron Microscope Method
- GB/T 35097-2018: Microbeam Analysis - Determination of Count Concentration of Asbestos and Other Inorganic Fibrous Particles in Ambient Air by Scanning Electron Microscope-Energy Dispersive Spectrometry
- GB/T 35099-2018: Microbeam Analysis - Morphology and Elemental Analysis of Individual Atmospheric Fine Particles by Scanning Electron Microscope-Energy Dispersive Spectrometry
- GB/T 36422-2018: Determination of Micro-morphology and Diameter of Chemical Fibers by Scanning Electron Microscopy
- GB/T 38783-2020: Scanning Electron Microscope Determination Method for Coating Thickness of Precious Metal Composites
- GB/T 40905.2-2022: Textiles - Quantitative Analysis of Cashmere, Wool, Other Special Animal Fibers and Their Mixtures - Part 2: Scanning Electron Microscope Method
- GB/T 33834-2017: Microbeam Analysis - Scanning Electron Microscopy - Analysis Method for Biological Samples by Scanning Electron Microscope
