The reaction from 1210K to 1473K is 3LiMn2O4_δ(Orthorhombic)→LiMnO2+ Mn3O4 + Li2Mn2O4+(l-3δ/2)O2 (g)(?) . Nucleating and growing is the key step of the process from 1210K to 1300K, and its activated energy is 185.61kJ/mol.
The parallel and separate palladium alloy nanowire arrays with equal composition and narrow diameters distribution with 8%15% Ni or 16%25% Ag can be obtained by nucleating at-1.5-1.4V for 51000ms and growing at-0.5-0.25V or-60-20μA/cm~2.
The results show that adding 0.04%Ti and 0.17%Zr can refine the grain to a certain degree. Joint addition of 0.20%Cr,(0.20%Mn) and 0.03%Ti has strong grain refinement effect. The refinement mechanism is that atom clusters containing minor Cr and Mn act as substrate of Al_3Ti particle,which nucleate α-Al.
(2)Pyrite cannot nucleate directly from solutions below 300 ℃,it can only form initially through sulfidation of a FeS precursor The rate equation of reaction between FeS and H 2S to form pyrite is of the second order;
A decreased size and narrowed distribution of SiO2 particles was obtained with the decrease of CNP-5 while keeping CH2O constant, which shows that whether or not each micelle can nucleate individually is a dominant factor for the particle numbers.
Carbide is an important kind of substrate material for making diamond film coated tools. The forming nucleation, the growth and interface characteristics of diamond film on carbide substrate affect its adhesive strength directly.
This paper studies the influences of Co content of carbide substrate on the forming nucleation, the growth and adhesive strength of diamond film by scanning electron microscopy, X-ray diffraction analysis, X-ray photo electron spectrum (XPS) and interrupted cutting experiment.
The results show that the influence of Co content of carbide substrate on the forming nucleation and growth of diamond film is not great after acid picking treatment, but the influence on adhesive strength is too much.
Based on discussions on the nucleation mechanism of particles in the polymerization system, the influences of monomer weight added dropwise, and amounts of initiator and emulsifier on the size and distribution of PS particles were investigated.
Isothermal crystallization kinetics of poly(trimethylene terephthalate) under the influence of self-seeding nucleation
The effect of self-seeding nucleation on the crystallization behavior of poly(trimethylene terephthalate) (PTT) was studied.
Differential scanning calorimetry (DSC) indicated that the crystallization temperature of PTT notably increased after self-seeding nucleation.
Self-seeding nucleation, leading to a decrease in active energy for crystallization and chain folding work, promotes the overall crystallization process of PTT.
The DSC results suggest that the mPE component shows a nucleating effect, and could increase the overall degree and rate of PTT crystallization, while the addition of a compatibilizer might slightly diminish these effects.
Restriction endonucleases from various bacterial strains displaying an ice-nucleating activity
Six strains containing site-specific endonucleases II were selected from a collection of 45 ice-nucleating bacterial strains isolated from rhizosphere of plants growing in various geographical regions.
The centrosome keeps nucleating microtubules but looses the ability to anchor them after the inhibition of dynein-dynactin compl
Asymptotic behavior of thermodynamic characteristics of nucleation on small macroscopic nuclei of soluble surfactants at their complete dissolution in a nucleating droplet is studied.
Based on the experiments, it was found that heat transfer enhancement of the internally ribbed tube could postpone departure from nucleate boiling at the sub-critical pressure.
At supercritical pressure, the temperature difference between the wall and the fluid increased near the pseudo-critical temperature, but the increase of wall temperature was less than that of departure from nucleate boiling at sub-critical pressure.
A geometrical-probabilistic model according to which particles of a new phase nucleate on active centers and grow by the diffusion law is considered.
Upon heat treatment, Er3+ and Tm3+ nucleate the growth of nanocrystalline β-PbF2, which acts as a host for rare-earth ions.
Relations are suggested for the calculation of the front velocity depending on the degree of super-heating of liquid and on the heat flux density on the heating surface, as well as the condition of transition from nucleate to explosion boiling