Felt-based carbon/carbon (C/C) composites were prepared by a super high pressure impregnation and carbonization process (SPIC) and graphitization at high temperatures.

The graphitization degrees of quasi-3D C/C composites were analyzed through X-ray diffractometer,and the element contents of hydrargyrum,arsenic,plumbum and cadmium in the materials were determined by the atomic fluorescence analyzer.

Research on compatibility effect between pretreatment extenders and cryoprotective extenders in frozen boar semen;