羽绒蓬松度是反映羽绒品质的重要指标,因为测试标准不同测试结果的可比性差。文中通过对GB/T、IDFB和EN等蓬松度测试标准的前处理以及测试的工具、仪器、操作环节等进行比较和分析,找出标准之间的主要差异。通过分析,蒸汽还原法可以使...羽绒蓬松度是反映羽绒品质的重要指标,因为测试标准不同测试结果的可比性差。文中通过对GB/T、IDFB和EN等蓬松度测试标准的前处理以及测试的工具、仪器、操作环节等进行比较和分析,找出标准之间的主要差异。通过分析,蒸汽还原法可以使羽绒原料充分恢复到自然状态,有利于反映蓬松度的实际值。虽然前处理环节的调湿时间各不相同,但超过48 h后,对于测试结果没有影响。各标准之间设备参数和操作基本相同的是GB/T 10288—2016与IDFB Part 10B:2015标准,其测试数据一致。展开更多
Ni/YSZ fuel electrodes can only operate under strongly reducing conditions for steam elec- trolysis in an oxide-ion-conducting solid oxide electrolyzer （SOE）. In atmosphere with a low content of H2 or without H2, ca...Ni/YSZ fuel electrodes can only operate under strongly reducing conditions for steam elec- trolysis in an oxide-ion-conducting solid oxide electrolyzer （SOE）. In atmosphere with a low content of H2 or without H2, cathodes based on redox-reversible Nb2TiO7 provide a promising alternative. The reversible changes between oxidized Nb2TiO7 and reduced Nbl.33Tio.6704 samples are systematically investigated after redox-cycling tests. The conductivities of Nb2TiO7 and reduced Nb1.33Tio.6704 are studied as a function of temperature and oxygen partial pressure and correlated with the electrochemical properties of the composite electrodes in a symmetric cell and SOE at 830 ℃. Steam electrolysis is then performed using an oxide-ion-conducting SOE based on a Nb1.33Ti0.6704 composite fuel electrode at 830 ℃. The current-voltage and impedance spectroscopy tests demonstrate that the reduction and activation of the fuel electrode is the main process at low voltage; however, the steam electrolysis dominates the entire process at high voltages. The Faradic efficiencies of steam electrolysis reach 98.9% when 3%H2O/Ar/4%H2 is introduced to the fuel electrode and 89% for that with introduction of 3%H2O/Ar.展开更多
文摘羽绒蓬松度是反映羽绒品质的重要指标,因为测试标准不同测试结果的可比性差。文中通过对GB/T、IDFB和EN等蓬松度测试标准的前处理以及测试的工具、仪器、操作环节等进行比较和分析,找出标准之间的主要差异。通过分析,蒸汽还原法可以使羽绒原料充分恢复到自然状态,有利于反映蓬松度的实际值。虽然前处理环节的调湿时间各不相同,但超过48 h后,对于测试结果没有影响。各标准之间设备参数和操作基本相同的是GB/T 10288—2016与IDFB Part 10B:2015标准,其测试数据一致。
文摘Ni/YSZ fuel electrodes can only operate under strongly reducing conditions for steam elec- trolysis in an oxide-ion-conducting solid oxide electrolyzer （SOE）. In atmosphere with a low content of H2 or without H2, cathodes based on redox-reversible Nb2TiO7 provide a promising alternative. The reversible changes between oxidized Nb2TiO7 and reduced Nbl.33Tio.6704 samples are systematically investigated after redox-cycling tests. The conductivities of Nb2TiO7 and reduced Nb1.33Tio.6704 are studied as a function of temperature and oxygen partial pressure and correlated with the electrochemical properties of the composite electrodes in a symmetric cell and SOE at 830 ℃. Steam electrolysis is then performed using an oxide-ion-conducting SOE based on a Nb1.33Ti0.6704 composite fuel electrode at 830 ℃. The current-voltage and impedance spectroscopy tests demonstrate that the reduction and activation of the fuel electrode is the main process at low voltage; however, the steam electrolysis dominates the entire process at high voltages. The Faradic efficiencies of steam electrolysis reach 98.9% when 3%H2O/Ar/4%H2 is introduced to the fuel electrode and 89% for that with introduction of 3%H2O/Ar.
