A new niobate K3Sr3MoNb9O30, was synthesized for the first time by solid state reaction, and was characterized by EPMA, XRD, SEM and DTA. The X -ray powder diffraction data of K3Sr3MoNb9O30 was first reported. The res...A new niobate K3Sr3MoNb9O30, was synthesized for the first time by solid state reaction, and was characterized by EPMA, XRD, SEM and DTA. The X -ray powder diffraction data of K3Sr3MoNb9O30 was first reported. The results show that K3Sr3MoNb9O30 belongs to tetragonal tungsten bronze (TTB) structure with unit cell parameters α=12. 4292(5) A . c = 3. 9338(3) A , and space group P4bm (100), z=1. The calculated and measured densities are 4. 897 g/crr3 and 4. 890 g/cm3, respectively.展开更多
By taking tetragonal tungsten bronze(TTB)phase Nb_(18)W_(16)O_(93)as an example,an improved solid-state sintering method at lower temperature of 1000℃for 36 h was proposed via applying nanoscale raw materials.XRD,SEM...By taking tetragonal tungsten bronze(TTB)phase Nb_(18)W_(16)O_(93)as an example,an improved solid-state sintering method at lower temperature of 1000℃for 36 h was proposed via applying nanoscale raw materials.XRD,SEM and XPS confirm that the expected sample was produced.GITT results show that the lithium-ion diffusion coefficient of Nb_(18)W_(16)O_(93)(10−12 cm^(2)/s)is higher than that of the conventional titanium-based anode,ensuring a relatively superior electrochemical performance.The lithium-ion diffusion mechanism was thoroughly revealed by using density functional theory simulation.There are three diffusion paths in TTB phase,among which the interlayer diffusion with the smallest diffusion barrier(0.46 eV)has more advantages than other typical anodes(such as graphite,0.56 eV).The relatively smaller lithium-ion diffusion barrier makes TTB phase Nb_(18)W_(16)O_(93)become a potential highspecific-power anode material.展开更多
Characterized by networking,digitization,and intellectualization,the new generation of Information and Communication Technologies(ICTs)has promoted integration of various national economic industries,with a more signi...Characterized by networking,digitization,and intellectualization,the new generation of Information and Communication Technologies(ICTs)has promoted integration of various national economic industries,with a more significant leading role in the socio-economic development.In order to describe the influence of ICT industries on economic growth,this paper has comprehensively analyzed the contribution mechanism of ICTs to current economy.Crucial indicators,such as Total Telecommunications Business(TTB),Data Traffic(DT),and Computing Power Development Index(CPDI),have been innovatively selected to sufficiently describe the data circulation scale and the processing capacity in the era of digital economy.Based on relevant statistics of 31 provinces(municipalities or autonomous regions)in China from 2011 to 2020,quantitative results have been put forward to interpret the impact of ICT industries on the national economy development by using correlation coefficient analysis and data regression analysis methods.The measurement results show that TTB,DT,and CPDI are positively correlated with the national economic development,indicating that each 1%increasement of TTB,DT,and CPDI increases Gross Domestic Product(GDP)by 0.08%,0.09%,and 0.6%,respectively.展开更多
基金Fund by Grant-in-Aid project (No. 98-10) of International Centre for Diffraction Data .
文摘A new niobate K3Sr3MoNb9O30, was synthesized for the first time by solid state reaction, and was characterized by EPMA, XRD, SEM and DTA. The X -ray powder diffraction data of K3Sr3MoNb9O30 was first reported. The results show that K3Sr3MoNb9O30 belongs to tetragonal tungsten bronze (TTB) structure with unit cell parameters α=12. 4292(5) A . c = 3. 9338(3) A , and space group P4bm (100), z=1. The calculated and measured densities are 4. 897 g/crr3 and 4. 890 g/cm3, respectively.
基金the Key R&D Program of Shaanxi Province,China(No.2019ZDLGY04-05)the Natural Science Foundation of Shaanxi Province,China(No.2019JLZ-01)+1 种基金the Fundamental Research Funds for the Central Universities of China(Nos.19GH020302,3102019JC005,3102021ZD0401,3102021TS0406)the Science,Technology,and Innovation Commission of Shenzhen Municipality,China(No.JCYJ20180508151856806).
文摘By taking tetragonal tungsten bronze(TTB)phase Nb_(18)W_(16)O_(93)as an example,an improved solid-state sintering method at lower temperature of 1000℃for 36 h was proposed via applying nanoscale raw materials.XRD,SEM and XPS confirm that the expected sample was produced.GITT results show that the lithium-ion diffusion coefficient of Nb_(18)W_(16)O_(93)(10−12 cm^(2)/s)is higher than that of the conventional titanium-based anode,ensuring a relatively superior electrochemical performance.The lithium-ion diffusion mechanism was thoroughly revealed by using density functional theory simulation.There are three diffusion paths in TTB phase,among which the interlayer diffusion with the smallest diffusion barrier(0.46 eV)has more advantages than other typical anodes(such as graphite,0.56 eV).The relatively smaller lithium-ion diffusion barrier makes TTB phase Nb_(18)W_(16)O_(93)become a potential highspecific-power anode material.
文摘Characterized by networking,digitization,and intellectualization,the new generation of Information and Communication Technologies(ICTs)has promoted integration of various national economic industries,with a more significant leading role in the socio-economic development.In order to describe the influence of ICT industries on economic growth,this paper has comprehensively analyzed the contribution mechanism of ICTs to current economy.Crucial indicators,such as Total Telecommunications Business(TTB),Data Traffic(DT),and Computing Power Development Index(CPDI),have been innovatively selected to sufficiently describe the data circulation scale and the processing capacity in the era of digital economy.Based on relevant statistics of 31 provinces(municipalities or autonomous regions)in China from 2011 to 2020,quantitative results have been put forward to interpret the impact of ICT industries on the national economy development by using correlation coefficient analysis and data regression analysis methods.The measurement results show that TTB,DT,and CPDI are positively correlated with the national economic development,indicating that each 1%increasement of TTB,DT,and CPDI increases Gross Domestic Product(GDP)by 0.08%,0.09%,and 0.6%,respectively.
