Abstract:

We got synthetic diamond crystal through atalytic nitriding via catalyzer Co of 99.99％ purity and synthesizing with Graphite SK₂ after pickling. Meanwhile, the effect of nitrogen impurity on the properties of the synthetic diamond was studied by using the ESR spectrometry and spectrography. The result shows that the proportion of paramagnetic nitrogen scaled\|up with  total nitrogen content increasing, in addition, the diamond became fragile and the compressive strength decreased with the color changing from yellow to green.

Key words: synthetic diamond; , volume fraction of nitrogen, compressive strength