Scientists have found clear differences between hexagonal and turbostratic boron nitride ceramic when studying their X-ray diffraction (XRD) patterns. Hexagonal boron nitride shows sharp and well-defined peaks in its XRD pattern. These peaks line up with the standard reference for highly ordered crystal structures. The main peak appears around 26.7 degrees two-theta, which matches the (002) plane spacing of about 3.33 angstroms. This indicates strong layer stacking order along the c-axis.
(What Are the Differences Between Hexagonal and Turbostratic Boron Nitride Ceramic XRD Patterns)
Turbostratic boron nitride looks different in XRD tests. Its (002) peak is much broader and less intense. The peak also shifts slightly to a lower angle, usually near 25 degrees two-theta. This shift suggests a larger interlayer spacing, often around 3.40 to 3.50 angstroms. The broad shape of the peak means the layers are not aligned neatly. They are rotated or tilted randomly relative to each other. This lack of long-range stacking order is typical of turbostratic materials.
(What Are the Differences Between Hexagonal and Turbostratic Boron Nitride Ceramic XRD Patterns)
Other peaks in the pattern also show this contrast. Hexagonal boron nitride displays clear (100), (101), and (102) reflections. Turbostratic samples either miss these peaks or show them very weakly. That happens because the random layer orientation cancels out some of the diffraction signals. Researchers use these XRD features to tell the two forms apart quickly. The method helps in quality control during material production. It also supports studies on how processing conditions affect the final structure of boron nitride ceramics.
