Experiments were carried out to ascertain multichannel discharge characteristics in a self-designed coaxial field-distortion gas switch filled with SFa-N2 or SF6-Ar gas mixtures of different mixing ratios. In these ex...Experiments were carried out to ascertain multichannel discharge characteristics in a self-designed coaxial field-distortion gas switch filled with SFa-N2 or SF6-Ar gas mixtures of different mixing ratios. In these experiments, the pressure varied from 0.1 MPa to 0.2 MPa, the voltage pulse peak applied to the switch was in the range from 40 kV to 78 kV, and the pulse rise time was 11 ns. The static breakdown strength of the gas switch gap in the switch was also measured. The results show that in general the average number of discharge channels for SF6-Ar or SF6-N2 gas mixture which contains less SFa is larger than that for gas mixture which contains more SF6, however, the average number of channels almost keeps constant as the gas mixing ratio varies when the pulse rise rate is high enough. The static breakdown strength of the gas switch gap decreases slightly as the content of argon or nitrogen increases.展开更多
In the semiconductor industry,recovering and capturing SF_(6)gas from the SF_(6)/N_(2)gas mixture has significant environmental and economic benefits.In this work,two Ni-based metal-organic frameworks(MOFs),Ni(i-na)(b...In the semiconductor industry,recovering and capturing SF_(6)gas from the SF_(6)/N_(2)gas mixture has significant environmental and economic benefits.In this work,two Ni-based metal-organic frameworks(MOFs),Ni(i-na)(bdc)_(0.5)(ina=isonicotinic acid,bdc=terephthalic acid)and methyl-functionalized Ni(3-min)(bdc)_(0.5)(3-min=3-methylisonicotinic acid),are constructed for SF_(6)capture.Ni(ina)(bdc)_(0.5)and Ni(3-min)(bdc)_(0.5)are both highly stable nine-connected porous materials.The pore sizes of these two materials are similar,but the pore environments are different,which has a bearing on the performance of SF_(6)/N_(2)separations.Ni(3-min)(bdc)0.s exhibits higher SF_(6)adsorption capacity(50.5 cm^(3)g^(-1))and IAST(ideal adsorbed solution theory)SF_(6)/N_(2)selectivity(91)owing to its smaller window diameter and suitable pore chemistry.Theoretical calculations indicate that the SF_(6)and N_(2)molecules interact with the framework at different cages,which reduces their competition for adsorption sites.The remarkable separation performance of Ni(ina)(bdc)_(0.5)and Ni(3-min)(bdc)_(0.5)is further verified by dynamic breakthrough experiments.Thus,these two adsorbents have the potential to be utilized in industrial applications due to their excellent structural stability and recyclability.展开更多
基金supported by National Natural Science Foundation of China(No.51177132)
文摘Experiments were carried out to ascertain multichannel discharge characteristics in a self-designed coaxial field-distortion gas switch filled with SFa-N2 or SF6-Ar gas mixtures of different mixing ratios. In these experiments, the pressure varied from 0.1 MPa to 0.2 MPa, the voltage pulse peak applied to the switch was in the range from 40 kV to 78 kV, and the pulse rise time was 11 ns. The static breakdown strength of the gas switch gap in the switch was also measured. The results show that in general the average number of discharge channels for SF6-Ar or SF6-N2 gas mixture which contains less SFa is larger than that for gas mixture which contains more SF6, however, the average number of channels almost keeps constant as the gas mixing ratio varies when the pulse rise rate is high enough. The static breakdown strength of the gas switch gap decreases slightly as the content of argon or nitrogen increases.
基金financially supported by the National Natural Science Foundation of China(No,21901198)the Thousand Talents Programs of Shaanxi Province and Shccig-Qinling Program.
文摘In the semiconductor industry,recovering and capturing SF_(6)gas from the SF_(6)/N_(2)gas mixture has significant environmental and economic benefits.In this work,two Ni-based metal-organic frameworks(MOFs),Ni(i-na)(bdc)_(0.5)(ina=isonicotinic acid,bdc=terephthalic acid)and methyl-functionalized Ni(3-min)(bdc)_(0.5)(3-min=3-methylisonicotinic acid),are constructed for SF_(6)capture.Ni(ina)(bdc)_(0.5)and Ni(3-min)(bdc)_(0.5)are both highly stable nine-connected porous materials.The pore sizes of these two materials are similar,but the pore environments are different,which has a bearing on the performance of SF_(6)/N_(2)separations.Ni(3-min)(bdc)0.s exhibits higher SF_(6)adsorption capacity(50.5 cm^(3)g^(-1))and IAST(ideal adsorbed solution theory)SF_(6)/N_(2)selectivity(91)owing to its smaller window diameter and suitable pore chemistry.Theoretical calculations indicate that the SF_(6)and N_(2)molecules interact with the framework at different cages,which reduces their competition for adsorption sites.The remarkable separation performance of Ni(ina)(bdc)_(0.5)and Ni(3-min)(bdc)_(0.5)is further verified by dynamic breakthrough experiments.Thus,these two adsorbents have the potential to be utilized in industrial applications due to their excellent structural stability and recyclability.
