Si-B-C-N materials derived from polymer precursors recently received a high attention due to their outstanding high temperature stability. It has been reported that the precursor-derived Si-B-C-N materials do not degrade at temperatures up to 2000℃

even in nitrogen-free environments. In addition

they possess superior mechanical properties such as excellent creep and oxidation resistance. Therefore these materials are promising for components which were serve at temperatures above 1000℃

such as turbine parts.Much studies have focused on amorphous Si-B-C-N materials

while especially studies on crystal Si-B-C-N nano-materials are still under the way.We focus on the optical properties of Si-B-C-N nanomaterials derived from boron-modified polysilazanes precursors. Scanning electronic microscopy (SEM) and high transmission electronic microscopy (TEM) observation showed a special structure just like bamboo. Photoluminescense (PL) spectrum was measured under 488 nm laser excitation from 89 K to 290 K. Three emission peaks were observed at about 580

620 and 740 nm

respectively. It is believed that the emission peaks were concerned with impurity level in the bandgap.