bulk composition
1.Nanoparticles show significant quantum-size effect (such as energy band discreteness, band gap broadening, blue shift in spectra etc.) as sizes of particles are smaller than Bohr radis of exciton of bulk material with same composition (for example, CdS’s Bohr radium is 6nm).
2.By using X-ray photoelectron spectroscopy(XPS or ESCA), small-angle X-ray scattering (SAXS), dynamic mechanical testing, and observations on surface contact angle, intrinsic viscosity and in vitro blood compatibility, the effects of solvents on the morphology of polymer chains, and the relationship between the microphase separation in the bulk and the surface composition of SPEU have been studied.
4.The deactivation of LILa 0.5Ti0. 5O2+λ catalysts prepared from LiNO3 is mainly caused by the loss of surface lithium. Inthe course of the coupling reaction the bulk lithium diffuses to the surface, leading to the de-composition of active phase containing lithium and lowering the amount of oxygen vacancies.
5.A series of compound RE bismuth-substituted iron garnet (TbYbBi)_3Fe_5O_(12) bulk crystal were grown by the modified flux method using Bi_2O_3 as main flux. The crystal structure and composition were characterized by XRD and EDS, respectively.
6.Bulk Ti3AlC2 material with high purity and density has been fabricated by pressing the powders mixture with the composition of TiC:Ti:Al:Si=2:1:1:0.2in molar ratio,at the temperature of 1300～1500℃ and the pressure of 30MPa for 2h.
7.The effects of the process parameters on the composition and microstructure of bulk nanocrystalline Co Ni alloy deposit prepared by jet electrodeposition are studied with SEM, EDS and XRD.
8.Chemical composition of bauxite chamotte 85#,75#,70# reached special class,secondary classⅠand secondary classⅡ,respectively according to GB standards. The bulk density of calcined bauxite reached corresponding GB standard.
9.The influence of bulk solvent effect on the mechanism of wurtz - synthesis is mainly discussed, which is explained rationaly by the micro model of wurtz - polymerization, and the mechanism of pyrogenation and agglomeration of poly-dimethylisilane, and die composition and the structure of intermediates are analyzed.
10.Analysis in the doorThese items included particle composition, bulk density, organic matter, pH, available N,Olsen-P,available K, total salt concentrations and fractions of four heavy metals (Cd> Cr, Pb> Hg) and residua of DDT & BHC pesticide.
