The properties of La 2O 3 doped molybdenum powder were studied. The La 2O 3 nanoparticles on the surface of molybdenum powder which is produced by the reduction of La(NO 3) 3 doped MoO 2 in hydrogen decrease the inten...The properties of La 2O 3 doped molybdenum powder were studied. The La 2O 3 nanoparticles on the surface of molybdenum powder which is produced by the reduction of La(NO 3) 3 doped MoO 2 in hydrogen decrease the intensity of feature energy loss peak of molybdenum substrate; but increase that of peak of Mo?3d. The surface of molybdenum powder exposed to the atmosphere can be reduced because the surface is mainly covered with La 2O 3 nanoparticles. As a result, the capability of anti oxidation of molybdenum is improved.展开更多
The effects of La_2O_3 doping on the phase structure.electric properties and aging properties of the samples were researched using XRD,SEM and electric property measurements.The results suggest that the aging value of...The effects of La_2O_3 doping on the phase structure.electric properties and aging properties of the samples were researched using XRD,SEM and electric property measurements.The results suggest that the aging value of Mn_(2.38)Ni_(0.5)Cu_(0.12)O_4 thermistor ceramic samples decreases from 10%to about 6%by only doping La_2O_3.The electrical stability of the sample has improved as well.Such doped material will broaden the production and application scope of Cu contained negative temperature coefficient thermal ceramics.展开更多
文摘The properties of La 2O 3 doped molybdenum powder were studied. The La 2O 3 nanoparticles on the surface of molybdenum powder which is produced by the reduction of La(NO 3) 3 doped MoO 2 in hydrogen decrease the intensity of feature energy loss peak of molybdenum substrate; but increase that of peak of Mo?3d. The surface of molybdenum powder exposed to the atmosphere can be reduced because the surface is mainly covered with La 2O 3 nanoparticles. As a result, the capability of anti oxidation of molybdenum is improved.
文摘The effects of La_2O_3 doping on the phase structure.electric properties and aging properties of the samples were researched using XRD,SEM and electric property measurements.The results suggest that the aging value of Mn_(2.38)Ni_(0.5)Cu_(0.12)O_4 thermistor ceramic samples decreases from 10%to about 6%by only doping La_2O_3.The electrical stability of the sample has improved as well.Such doped material will broaden the production and application scope of Cu contained negative temperature coefficient thermal ceramics.
