Preparation of Nickel Nanoparticles by the Thermal Decomposition of NiC2O4. 2H2O Precursor in the Argon Gas

Pyrolytic Decomposition ◽

Nickel nanoparticles are successfully obtained by the pyrolytic decomposition of NiC2O4. 2H2O in the argon gas. The pyrolysates of NiC2O4. 2H2O in the argon gas are investigated by TG-DSC and TEM. The results show that there are two stages in the process of the pyrolytic decomposition of NiC2O4. 2H2O in the argon gas. The crystal water in NiC2O4. 2H2O is lost from 200 °C to 300 °C. NiC2O4 is pyrolysized into nickel powder from 325 °C to 425 °C. At the same time, the influence of temperature on the particle size of the decomposition is more from 254.4 °C to 407.5 °C. The influence of temperature on the particle size of the decomposition is less from 407.5 °C to 450.0 °C. Therefore, the pyrolytic condition of NiC2O4. 2H2O in the air is controlled if nickel nanoparticles are prepared.

Preparation of Metallic Cobalt Nanoparticles by the Thermal Decomposition of CoC2O4. 2H2O Precursor in the Argon Gas

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.127.85 ◽

2011 ◽

Vol 127 ◽

pp. 85-88 ◽

Cited By ~ 1

Author(s):

Xiao Ming Fu

Keyword(s):

Thermal Decomposition ◽

Cobalt Nanoparticles ◽

Cobalt Powder ◽

Metallic Cobalt ◽

Crystal Water ◽

Argon Gas ◽

Pyrolytic Decomposition ◽

Metallic cobalt nanoparticles are successfully obtained by the pyrolytic decomposition of CoC2O4. 2H2O in the argon gas. The pyrolysates of CoC2O4. 2H2O were investigated by TG-DSC and SEM. The results showed that there are two stages in the process of the pyrolytic decomposition of CoC2O4. 2H2O in the argon gas. The crystal water in CoC2O4. 2H2O was lost from 150 °C to 275 °C. CoC2O4was pyrolysized into metallic cobalt powder from 300 °C to 500 °C. At the same time, the pattern of pyolysate of CoC2O4. 2H2O was fined at 347.7 °C for 10 min. But, the particles of pyolysate of CoC2O4. 2H2O were sintered into cobalt blocks at 500.0 °C for 10 min. Therefore, the conditions of pyrolytic decomposition of CoC2O4. 2H2O were controlled if single cobalt powder was obtained at 500.0 °C..

Preparation of Spherical NiO Nanoparticles by the Thermal Decomposition of NiC2O4 2H2O Precursor in the Air

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.228-229.34 ◽

2011 ◽

Vol 228-229 ◽

pp. 34-37 ◽

Cited By ~ 1

Author(s):

Xiao Ming Fu ◽

Zai Zhi Yang

Keyword(s):

Thermal Decomposition ◽

Nio Nanoparticles ◽

Crystal Water ◽

Pyrolytic Decomposition ◽

Sem And Tem ◽

The pyrolysates of NiC2O4. 2H2O in the air were investigated by TG-DSC, SEM and TEM. The results showed that there are two stages in the process of the pyrolytic decomposition of NiC2O4. 2H2O in the air. The crystal water in NiC2O4. 2H2O was lost from 175 °C to 275 °C. NiC2O4 was pyrolysized into NiO from 325 °C to 400 °C. In the process of the pyrolytic decomposition of NiC2O4. 2H2O, the influence on the pattern of the decomposition was more from 246.5 °C to 357.8 °C. The influence on the pattern of the decomposition was less from 357.8 °C to 400.0 °C. Therefore, the pyrolytic condition of NiC2O4. 2H2O in the air was controlled if the effective pattern of NiO powder was obtained. At the same time, spherical NiO of about 5 nm is obtianed through the pyrolytic decomposition of NiC2O4. 2H2O at 400 °C for 10 min at the rate of 10 °C / min.

Thermal Decomposition of Tobacco: V. Influence of Temperature on the Formation of Carbon Monoxide and Carbon Dioxide

Beiträge zur Tabakforschung International/Contributions to Tobacco Research ◽

10.2478/cttr-2013-0359 ◽

1975 ◽

Vol 8 (2) ◽

Author(s):

H. R. Burton

Keyword(s):

Carbon Dioxide ◽

Thermal Decomposition ◽

Carbon Monoxide ◽

Influence Of Temperature On

AbstractThe temperature-yield profiles of CO and CO

Dormancy studies in seed of Avena fatua. 12. Influence of temperature on germination behavior of nondormant families

Canadian Journal of Botany ◽

10.1139/b80-072 ◽

1980 ◽

Vol 58 (5) ◽

pp. 578-581 ◽

Cited By ~ 14

Author(s):

Ramma Sawhney ◽

J. M. Naylor

Keyword(s):

Low Temperatures ◽

Development Stage ◽

Avena Fatua ◽

Maturation Stage ◽

Pure Lines ◽

Stage 1 ◽

Two Stages ◽

Incubation Temperatures

Experiments are reported which clarify the influence of temperature on dormancy of seed of Avena fatua. Temperature treatments administered at two stages of the life cycle, during seed development (stage 1) and during the period immediately following seed maturation (stage 2), influence the duration of dormancy in all families (pure lines) so far investigated. There is evidence for induction of thermodormancy by relatively high incubation temperatures. This effect is most evident in seed which experienced relatively low temperatures during maturation. The significance of dormancy in the adaptation of "nondormant" (ND) families is discussed.

Simulation of non-isothermal resin transfer molding process cycle and optimization of temperature system

Journal of Reinforced Plastics and Composites ◽

10.1177/0731684418800599 ◽

2018 ◽

Vol 38 (1) ◽

pp. 3-14 ◽

Cited By ~ 3

Author(s):

Wenkai Yang ◽

Shihong Lu ◽

Lintong Xiang ◽

Wenhao Liu

Keyword(s):

Resin Transfer Molding ◽

Three Dimensional ◽

Molding Process ◽

Transfer Molding ◽

Fluent Software ◽

Dimensional Simulation ◽

The filling and curing stage of resin transfer molding is non-isothermal. The temperature plays an important role in both filling and curing stage and these two stages are strongly interrelated. The unreasonable temperature system will lead to excessive temperature difference and seriously affect the quality of the product. Therefore, it is necessary to analyze the non-isothermal filling and curing stage to find the best temperature system. In this paper, the FLUENT software has been secondarily developed to perform a full three-dimensional simulation of the non-isothermal resin transfer molding process cycle. The results have been compared with the known data to verify the accuracy of the simulation. The influence of temperature on the process cycle has been analyzed and the optimization of temperature system can reduce process cycle time and increase the uniformity of temperature distribution.

The effect of temperature on high-resolution TEM image contrast

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100139573 ◽

1995 ◽

Vol 53 ◽

pp. 640-641

Author(s):

T. Geipel ◽

W. Mader ◽

P. Pirouz

Keyword(s):

Form Factor ◽

Inelastic Scattering ◽

Accurate Method ◽

Waller Factor ◽

Effect Of Temperature ◽

Specimen Thickness ◽

Debye Waller Factor ◽

Atomic Form Factor

Temperature affects both elastic and inelastic scattering of electrons in a crystal. The Debye-Waller factor, B, describes the influence of temperature on the elastic scattering of electrons, whereas the imaginary part of the (complex) atomic form factor, fc = fr + ifi, describes the influence of temperature on the inelastic scattering of electrons (i.e. absorption). In HRTEM simulations, two possible ways to include absorption are: (i) an approximate method in which absorption is described by a phenomenological constant, μ, i.e. fi; - μfr, with the real part of the atomic form factor, fr, obtained from Hartree-Fock calculations, (ii) a more accurate method in which the absorptive components, fi of the atomic form factor are explicitly calculated. In this contribution, the inclusion of both the Debye-Waller factor and absorption on HRTEM images of a (Oll)-oriented GaAs crystal are presented (using the EMS software.Fig. 1 shows the the amplitudes and phases of the dominant 111 beams as a function of the specimen thickness, t, for the cases when μ = 0 (i.e. no absorption, solid line) and μ = 0.1 (with absorption, dashed line).