Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Chenggao, Fan"'
Publikováno v:
In Polymer Testing 2004 23(8):897-901
Publikováno v:
European Polymer Journal. 41:329-340
Viscosity measurements had been made on poly(vinyl alcohol) (PVA), poly(N-vinyl-2-pyrrolidone) (PVP) and poly(ethylene oxide) (PEO) solutions down to low concentrations. It was found that t 0 ∗ defined as the flow time of the pure solvent in ideal
Publikováno v:
European Polymer Journal. 37:2425-2428
The 13 C spin-lattice relaxation time T 1c , the spin–spin relaxation time T 2c , the chemical shift values as well as mass fractions of the interphase of PE samples crystallized under various conditions were reported mainly in this work. The exist
Publikováno v:
European Polymer Journal. 37:1939-1942
Viscometric behavior of polyvinyl alcohol (PVA) in NaCl/water solution ranged from dilute to extremely dilute concentrations was thoroughly investigated. Due to the influence of the adsorbed polymer on the walls of Ubbelohde viscometer capillary, an
Publikováno v:
Physica Status Solidi (a). 124:K89-K92
Etude par diffraction RX et par microscopie electronique. Le fait de broyer a sec, a temperature ambiante, peut provoquer une transformation de cristallin a amorphe de ce cristal
Publikováno v:
Journal of Superconductivity. 8:765-767
A superconductor with nominal composition Hg0.8Mo0.2Sr2Y0.5Ca0.5Cu6+δ withT c up to 96 K has been isolated and carefully examined by electron diffraction and X-ray energy dispersive spectrum analyses. Its structure can be attributed to space groupP4
Publikováno v:
Physica Status Solidi (a). 128:K105-K107
Publikováno v:
Proceedings, annual meeting, Electron Microscopy Society of America. 52:800-801
Four superconducting phases have been found in cuprates with Bi bilayers. The ideal chemical compositions of these phases are identified as Bi2Sr2Can-1CunO2n+4+δ, n=l,2,3,4.The Tc of n=l,2,3 phasesis 20, 80, 110K respectively. The n=4 phase wasonly
Publikováno v:
Proceedings, annual meeting, Electron Microscopy Society of America. 48:104-105
Since 132K superconductivity in Sb and Pb doped Bi-Sr-Ca-Cu-O system was discovered by H.B.Liu et al, the experimental phenomenon has been repeated by many research groups in the world. It is well known that there always coexist several phases in suc
Publikováno v:
Proceedings, annual meeting, Electron Microscopy Society of America. 48:792-793
High current density STEM probe can be used to drill holes and to draw wonderful pictures through samples such as metal β-aluminas, feuoride and titaniun oxide etc. Resently, we have also found that the high current density subnanometer probe in the