Some extraditional types—black rock series types of platinum group element (PGE), gold and silver mineralization occurrences were found in the Lower Cambrian in Guizhou and Hunan provinces of southwest China where PG...Some extraditional types—black rock series types of platinum group element (PGE), gold and silver mineralization occurrences were found in the Lower Cambrian in Guizhou and Hunan provinces of southwest China where PGE concentration reaches more than 800×10 -6. Sea floor hydrothermal fluid eruption was suggested to have been the main origin of the ore-forming materials. The whole process from the sedimentation to the redistribution of the ore-forming elements occurred on the conditions of intermediate to weak alkaline, weak reduction to weak oxidation. The temperature for the sedimentation and redistribution of the ore-forming elements was lower than 210 ℃. At such a low temperature, inert elements such as PGE, Au and Ag could quite easily be remobilized.展开更多
To prepare the adherent and high active platinum black plated titanium electrode,ultrasonic agitation technology was adopted during the electrodeposition.Ultrasonic agitation technology enhanced the activity of electr...To prepare the adherent and high active platinum black plated titanium electrode,ultrasonic agitation technology was adopted during the electrodeposition.Ultrasonic agitation technology enhanced the activity of electrode,improved the cohesion between coatings and substrate,changed the microscopical surface shape and increased the real surface area of electrode.The enhancement of the activity of electrode was in large due to the electrode rugosity.展开更多
文摘Some extraditional types—black rock series types of platinum group element (PGE), gold and silver mineralization occurrences were found in the Lower Cambrian in Guizhou and Hunan provinces of southwest China where PGE concentration reaches more than 800×10 -6. Sea floor hydrothermal fluid eruption was suggested to have been the main origin of the ore-forming materials. The whole process from the sedimentation to the redistribution of the ore-forming elements occurred on the conditions of intermediate to weak alkaline, weak reduction to weak oxidation. The temperature for the sedimentation and redistribution of the ore-forming elements was lower than 210 ℃. At such a low temperature, inert elements such as PGE, Au and Ag could quite easily be remobilized.
文摘To prepare the adherent and high active platinum black plated titanium electrode,ultrasonic agitation technology was adopted during the electrodeposition.Ultrasonic agitation technology enhanced the activity of electrode,improved the cohesion between coatings and substrate,changed the microscopical surface shape and increased the real surface area of electrode.The enhancement of the activity of electrode was in large due to the electrode rugosity.
