Graphitization Degree Testing Methods: Comparison of XRD, Raman Spectro"&"scopy, and Conductivity Method
Graphitization degree is a core indicator for evaluating the graphitization effect, but how to measure it? Three commonly used methods each have their advantages and disadvantages and are suitable for different scen"&"arios.
X-ray Diffraction (XRD) Method
Principle: By measuring the diffraction peak positions of the (002) crystal plane of carbon materials, the d002 value is calculated and compared with the 3.35"&"4 ? of ideal graphite to calculate the graphitization degree.
**Advantages:** Internationally recognized as the most authoritative method, reliable results, and traceable. **Disadvantages:** Requires sampling and testing; cannot be monitored online i"&"n real time; expensive equipment and long testing cycle. **Applications:** R&D stage, quality inspection, customer acceptance. **Raman Spectroscopy:** **Principle:** The degree of graphitization is assessed by measuring the intensity ratio Id/Ig of the"&" D peak (defect peak) and the G peak (graphite peak). The smaller the Id/Ig ratio, the higher the degree of graphitization.Advantages:Fast (results in minutes), non-destructive (no sample damage required), portable equipment
<"&"strong>Disadvantages:It is a semi-quantitative method and requires calibration with XRD results for accurate conversion
Applications:Rapid screening in R&D, production process inspection
C"&"onductivity Method
Principle:Graphitization degree is highly correlated with conductivity. Graphitization degree is indirectly estimated by measuring the stability of the material.
Advantages: Enables real-time online monitor"&"ing without sampling; simple equipment and low cost. Disadvantages: Indirect calculation, susceptible to interference from factors such as material density and porosity; requires prior calibration using XRD. Applicable to: Online monitoring of productio"&"n lines, process control. Recommended combination: Use XRD (precise) + Raman (rapid) for mutual verification during the R&D phase; use conductivity method for online monitoring during the production phase, and periodically use XRD for spot checks and cal"&"ibration.")
