Based on ’Theoryof Electron Donating, Accepting and Exchanging’whichtheauthorpub lishedin 1989 ,thispaperexplainsin detailsaboutthesuperconductivityof metallicelements,metalliccompoundsand alloys. Italso providesa ...Based on ’Theoryof Electron Donating, Accepting and Exchanging’whichtheauthorpub lishedin 1989 ,thispaperexplainsin detailsaboutthesuperconductivityof metallicelements,metalliccompoundsand alloys. Italso providesa methodto raise Tc.展开更多
Heavy-fermion superconductors (HFSCs) are regarded as outside the purview of BCS theory because it is usually constrained by the inequality , where EF, μ, kB, and θD are, respectively, the Fermi energy, chemical pot...Heavy-fermion superconductors (HFSCs) are regarded as outside the purview of BCS theory because it is usually constrained by the inequality , where EF, μ, kB, and θD are, respectively, the Fermi energy, chemical potential, Boltzmann constant, and the Debye temperature. We show that this restriction can be removed by incorporating μ into the equations for Tc and the gap Δ0 at T = 0. Further, when μ kBθD, we curtail the limits of the equations for Tc and Δ0 to avoid complex-valued solutions. The resulting equations are applied to a prominent member of the HFSC family, i.e., CeCoIn5, by appealing to ideas due to Born and Karmann, Suhl et al., and Bianconi et al. Since the equations now contain an additional variable μ, we find that 1) the Tc of the SC can be accounted for by a multitude of values of the (μ, λ) pair, λ being the interaction parameter;2) the λ vs. μ plot has a dome-like structure when μ kBθD;3) the (μ, λ) values obtained in 2) lead to reasonable results for the range of each of the following variables: Δ0, s, and n, where s is the ratio of the mass of a conduction electron and the free electron mass and n is the number density of charge carriers in the SC.展开更多
The combination energy and chemical adsorption energy of N-substituted perfluoropoly-alkyletherphenylamide (PFPEA) additive to perfluoropolyalkylether oxygen radical (RfO.) and to Fe atom have been calculated by quant...The combination energy and chemical adsorption energy of N-substituted perfluoropoly-alkyletherphenylamide (PFPEA) additive to perfluoropolyalkylether oxygen radical (RfO.) and to Fe atom have been calculated by quantum chemical methods. Structural characteristics, action mechanism, property of donating-accepting electron and substituent effect for antioxidant and anticorrosive additive are investigated. It is found that HOMO of the additives is a π-molecular orbital with lone pair electron of heteroatom. The HOMO of PFPEA additive reacts with LUMO of Fe atom to result in chemical adsorption. The LUMO of additive can interact with the SOMO of RfO. and accept electron of RfO. to form stable addition product. The additives have the property of donating-accepting electron. The electron-releasing group, particularly, the phenyl group, introduced to N atom of phenylamide can increase the combination energy and chemical adsorption energy, and enhance the antioxidant and anticorrosive efficiency. The research achievements can provide useful information for the designing of new antioxidant and anticorrosive additive. Based on the calculated results, antioxidant and anticorrosive efficiency can be predicted roughly as the following order: compounds Ⅲ>Ⅱ>Ⅰ>Ⅳ>Ⅴ.展开更多
High Te superconductor （HTS） technology has been used to develop a unique high Q resonant circuit. Such circuit or device has some special characteristics such as very high voltage generation. Theoretical study and ...High Te superconductor （HTS） technology has been used to develop a unique high Q resonant circuit. Such circuit or device has some special characteristics such as very high voltage generation. Theoretical study and experimental approaches have proceeded for the concept verification. This paper presents the theory about this high Q resonant circuit. The operation principle of the circuit is described. A practical prototype for HTS high voltage generation is also demonstrated. The experiment result shows that very high voltages can be achieved by the developed method using HTS technology.展开更多
原子间相互交替施受或互换价电子是金属键合的基本模式。金属 Na 中某 A 原子可施舍或接受一个3s 电子,与其相邻的 B 原子则可接受或施舍一个3s 电子,使 A、B 原子核周围均获得封闭的电子组态。Hg 原子的电子外壳层己具有稳定的封闭状态...原子间相互交替施受或互换价电子是金属键合的基本模式。金属 Na 中某 A 原子可施舍或接受一个3s 电子,与其相邻的 B 原子则可接受或施舍一个3s 电子,使 A、B 原子核周围均获得封闭的电子组态。Hg 原子的电子外壳层己具有稳定的封闭状态,金属 Hg 中的相邻原子不能相互施受电子,只能互换电子。金属中的任何一个原子与其等同相邻的每一个原子有交替施受互换电子的同等机会。原属 A 原子的电子通过 A、B 原子间的施受交换过程可传递给 B 原子,再通过 B、C 原子间的施受交换过程又可转移给 C 原子,所以金属中的任何一个价电子并不始终处在定域化的束缚状态中。在外加电压的作用下可使无方向性的施受交换电子过程变成有方向性,即形成电流。价电子在原子表层中时的能量低于在晶格空隙中时的能量,在原子表层中出现的机率大于在晶格空隙中出现的机率,传导电子是沿着原子表层自一个原子越过原子面之间的间隙势垒进入另一个原子的表层的。展开更多
文摘Heavy-fermion superconductors (HFSCs) are regarded as outside the purview of BCS theory because it is usually constrained by the inequality , where EF, μ, kB, and θD are, respectively, the Fermi energy, chemical potential, Boltzmann constant, and the Debye temperature. We show that this restriction can be removed by incorporating μ into the equations for Tc and the gap Δ0 at T = 0. Further, when μ kBθD, we curtail the limits of the equations for Tc and Δ0 to avoid complex-valued solutions. The resulting equations are applied to a prominent member of the HFSC family, i.e., CeCoIn5, by appealing to ideas due to Born and Karmann, Suhl et al., and Bianconi et al. Since the equations now contain an additional variable μ, we find that 1) the Tc of the SC can be accounted for by a multitude of values of the (μ, λ) pair, λ being the interaction parameter;2) the λ vs. μ plot has a dome-like structure when μ kBθD;3) the (μ, λ) values obtained in 2) lead to reasonable results for the range of each of the following variables: Δ0, s, and n, where s is the ratio of the mass of a conduction electron and the free electron mass and n is the number density of charge carriers in the SC.
文摘The combination energy and chemical adsorption energy of N-substituted perfluoropoly-alkyletherphenylamide (PFPEA) additive to perfluoropolyalkylether oxygen radical (RfO.) and to Fe atom have been calculated by quantum chemical methods. Structural characteristics, action mechanism, property of donating-accepting electron and substituent effect for antioxidant and anticorrosive additive are investigated. It is found that HOMO of the additives is a π-molecular orbital with lone pair electron of heteroatom. The HOMO of PFPEA additive reacts with LUMO of Fe atom to result in chemical adsorption. The LUMO of additive can interact with the SOMO of RfO. and accept electron of RfO. to form stable addition product. The additives have the property of donating-accepting electron. The electron-releasing group, particularly, the phenyl group, introduced to N atom of phenylamide can increase the combination energy and chemical adsorption energy, and enhance the antioxidant and anticorrosive efficiency. The research achievements can provide useful information for the designing of new antioxidant and anticorrosive additive. Based on the calculated results, antioxidant and anticorrosive efficiency can be predicted roughly as the following order: compounds Ⅲ>Ⅱ>Ⅰ>Ⅳ>Ⅴ.
文摘High Te superconductor （HTS） technology has been used to develop a unique high Q resonant circuit. Such circuit or device has some special characteristics such as very high voltage generation. Theoretical study and experimental approaches have proceeded for the concept verification. This paper presents the theory about this high Q resonant circuit. The operation principle of the circuit is described. A practical prototype for HTS high voltage generation is also demonstrated. The experiment result shows that very high voltages can be achieved by the developed method using HTS technology.
文摘原子间相互交替施受或互换价电子是金属键合的基本模式。金属 Na 中某 A 原子可施舍或接受一个3s 电子,与其相邻的 B 原子则可接受或施舍一个3s 电子,使 A、B 原子核周围均获得封闭的电子组态。Hg 原子的电子外壳层己具有稳定的封闭状态,金属 Hg 中的相邻原子不能相互施受电子,只能互换电子。金属中的任何一个原子与其等同相邻的每一个原子有交替施受互换电子的同等机会。原属 A 原子的电子通过 A、B 原子间的施受交换过程可传递给 B 原子,再通过 B、C 原子间的施受交换过程又可转移给 C 原子,所以金属中的任何一个价电子并不始终处在定域化的束缚状态中。在外加电压的作用下可使无方向性的施受交换电子过程变成有方向性,即形成电流。价电子在原子表层中时的能量低于在晶格空隙中时的能量,在原子表层中出现的机率大于在晶格空隙中出现的机率,传导电子是沿着原子表层自一个原子越过原子面之间的间隙势垒进入另一个原子的表层的。
