Bias voltage assisted hot filament chemical vapor deposition (HFCVD) was adopted to deposit boron-doped diamond (BDD) film on porous titanium substrate, and diamond composite membrane materials were prepared and characterized by X-ray diffraction method. The influence of carbon concentration, boron source concentration, substrate temperature were discussed respectively on the diamond quality and the transition layer TiC. Results showed that: The concentration of carbon source was related to crystal orientation and the growth rate of diamond. The increase of diamond nucleation density and growth rate prevented the formation of TiC, and improved adhesion between diamond and the substrate; The increasing of boron source concentration promoted the orientation growth of diamond film (111) lattice plane, while reduced the content of TiC; Temperature affected the formation of TiC, and TiC diffraction peaks intensity decreased with the increase of substrate temperature; As the substrate temperature increased, secondary nucleation rate caused cauliflower-like structure which dominated growth mechanism transitting from MCD (Microcrystalline diamond) to the NCD (Nanocrystalline diamond).

In this study, Zn1-xCrxO thin films were successfully fabricated on glass substrates by magnetron sputtering technique. The relationship between Cr doping concentration and the structural and optical characteristics of the produced samples was investigated by X-ray diffraction (XRD), optical transmittance and photoluminescence(PL). EDS results demonstrate that Cr ions are substitutionally incorporated into ZnO. XRD analysis reveals that all the prepared films with a preferential c-axis orientation exhibit the wurtzite structure of ZnO. The spectrometer transmittance data indicates that the band gap energies of the Zn1-xCrxO films are calculated by a linear fitting method. The band gap is found to be large with the increasing dopant concentration. The PL spectra suggest that all the samples have an ultraviolet emission peak centered at 370 nm. With the improved Cr-doped concentration, the peaks of ultraviolet emission have a blue shift to the region of higher photon energy, which is coincident with those values calculated by the linear fitting from the transmittance data. It is also found that the intensity of ultraviolet emission has been remarkably improved when Cr content is approximately 2.0at.%, but it is decreased when doping concentration of Cr is excessively high.