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

讨了为获得放射虫化石高质量二次电子图像所用试样制备方法。

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

通过多次试验，认为放射虫化石导电处理应用碳-金双层镀膜法。