In this paper the sample preparation techniques of radiolarite were discussed in order to get high quality secondary electron images in SEM.

讨论了为获得放射的高质量的二次电子图像所用的样制备方法。

Experimental results showed that double coats of carbon and gold on the conductive coating of radiolarite should be used.

通过多次，为放射的表面导电处理应用碳-金双层镀膜法。