scholarly journals Room-temperature graphitization in a solid-phase reaction

RSC Advances ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 914-922
Author(s):  
Sahar Elnobi ◽  
Subash Sharma ◽  
Mona Ibrahim Araby ◽  
Balaram Paudel ◽  
Golap Kalita ◽  
...  
Keyword(s):  
Deposition Temperature ◽  
Room Temperature ◽  
Solid Phase ◽  
Solid Phase Reaction ◽  
Phase Reaction

The spontaneous graphitization for C films containing Ni NPs was attributed mainly to the increased solubility for metallic Ni NPs, and was enhanced at the deposition temperature of 50 °C.

scholarly journals Preparation and Properties of Co-Doped Magnesium Lanthanum Hexaluminat Blue Ceramics

Ceramics ◽  
2020 ◽  
Vol 3 (2) ◽  
pp. 235-244 ◽  
Author(s):  
Rui Guo ◽  
Qingchun Wang ◽  
Jinxiao Bao ◽  
Xiwen Song
Keyword(s):  
Room Temperature ◽  
Solid Phase ◽  
Color Stability ◽  
Effect Of Temperature ◽  
Solid Phase Reaction ◽  
Phase Reaction ◽  
Doping Amount ◽  
Zirconia Ceramics ◽  
A Value ◽  
Co Doped

The types of blue ceramics are monotonous, mainly alumina and zirconia ceramics, and their colors are not pure, with some green tones (−a* value is not close to 0). In this paper, aluminate blue ceramics (LaMgAl11−xCoxO19) doped with Co were prepared by the high temperature solid-phase reaction method, which enriched the blue ceramics system. The effect of Co content on the color of ceramics was studied, and the optimal doping amount of Co was found. X = 1.0 is the bluest color of the material (−b* = 35.36), and there is almost no noise effect (−a* = −2.71). By studying the effect of temperature on the system, it is found that the color effect is best when the temperature reaches 1450 °C. When the temperature exceeds 1450 °C, it can only promote the synthesis of LaMgAl11O19 phase, and has no effect on the color of ceramics samples. Based on the material’s pure and bright colors, and good color stability at room temperature, it has great potential in the decoration industry, such as the preparation of jewelry or building decoration materials.

scholarly journals Store and Release of Oxygen of Ceria-Zirconia Solid Solution Synthesized by Solid Phase Reaction at Near Room Temperature.

2001 ◽  
Vol 109 (1267) ◽  
pp. 177-180 ◽  
Author(s):  
Akihiko SUDA ◽  
Hideo SOBUKAWA ◽  
Tadashi SUZUKI ◽  
Toshio KANDORI ◽  
Yoshio UKYO ◽  
...  
Keyword(s):  
Solid Solution ◽  
Room Temperature ◽  
Solid Phase ◽  
Solid Phase Reaction ◽  
Phase Reaction

Ultrathin Dielectric Films Grown by Solid Phase Reaction of Pr with SiO2

2004 ◽  
Vol 811 ◽  
Author(s):  
Hans-Joachim Müssig ◽  
Jarek Dąbrowski ◽  
Christian Wenger ◽  
Grzegorz Łupina ◽  
Roland Sorge ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Photoelectron Spectroscopy ◽  
Room Temperature ◽  
Solid Phase ◽  
High Vacuum ◽  
Ultra High Vacuum ◽  
Dielectric Films ◽  
Solid Phase Reaction ◽  
Phase Reaction

ABSTRACTWe have fabricated Pr-based high-k gate dielectric films by physical vapor deposition of metallic Pr on SiO2 under ultra-high vacuum (UHV) conditions at room temperature, followed by oxidation and annealing steps. The films have been analyzed by electrical measurements, X-ray Photoelectron Spectroscopy (XPS) and Transmission Electron Microscopy (TEM). Some insight into the physical processes involved has been obtained from ab initio calculations. The high-k gate stacks consist of a SiO2-based buffer with an enhanced dielectric constant and a Pr silicate barrier with a high dielectric constant. The role of the buffer is to preserve the high quality of the SiO2/Si(001) interface, and the role of the barrier is to keep the tunneling currents low by increasing its physical thickness. A Pr film deposited on a 1.8 nm SiO2 layer, oxidized at room temperature by air, and annealed in N2 atmosphere with O2 partial pressure of 10−3 mbar results in a stack with the Capacitance Equivalent Thickness of 1.5 nm and leakage of 10−4 A/cm2.

scholarly journals Features of structure, magnetic state and electrodynamic performance of SrFe12−xInxO19

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
V. A. Turchenko ◽  
S. V. Trukhanov ◽  
V. G. Kostishin ◽  
F. Damay ◽  
F. Porcher ◽  
...  
Keyword(s):  
Loss Tangent ◽  
Room Temperature ◽  
Solid Phase ◽  
Spontaneous Magnetization ◽  
Magnetic Loss ◽  
Solid Phase Reaction ◽  
Phase Reaction ◽  
Low Frequencies ◽  
Cell Parameters ◽  
And Shifts

AbstractIndium-substituted strontium hexaferrites were prepared by the conventional solid-phase reaction method. Neutron diffraction patterns were obtained at room temperature and analyzed using the Rietveld methods. A linear dependence of the unit cell parameters is found. In3+ cations are located mainly in octahedral positions of 4fVI and 12 k. The average crystallite size varies within 0.84–0.65 μm. With increasing substitution, the TC Curie temperature decreases monotonically down to ~ 520 K. ZFC and FC measurements showed a frustrated state. Upon substitution, the average and maximum sizes of ferrimagnetic clusters change in the opposite direction. The Mr remanent magnetization decreases down to ~ 20.2 emu/g at room temperature. The Ms spontaneous magnetization and the keff effective magnetocrystalline anisotropy constant are determined. With increasing substitution, the maximum of the ε/ real part of permittivity decreases in magnitude from ~ 3.3 to ~ 1.9 and shifts towards low frequencies from ~ 45.5 GHz to ~ 37.4 GHz. The maximum of the tg(α) dielectric loss tangent decreases from ~ 1.0 to ~ 0.7 and shifts towards low frequencies from ~ 40.6 GHz to ~ 37.3 GHz. The low-frequency maximum of the μ/ real part of permeability decreases from ~ 1.8 to ~ 0.9 and slightly shifts towards high frequencies up to ~ 34.7 GHz. The maximum of the tg(δ) magnetic loss tangent decreases from ~ 0.7 to ~ 0.5 and shifts slightly towards low frequencies from ~ 40.5 GHz to ~ 37.7 GHz. The discussion of microwave properties is based on the saturation magnetization, natural ferromagnetic resonance and dielectric polarization types.

Facile composite synthesis and photoluminescence of NaGd(MoO4)2: Ln3+ (Ln = Eu, Tb) submicrometer phosphors

2009 ◽  
Vol 24 (1) ◽  
pp. 32-38 ◽  
Author(s):  
Bing Yan ◽  
Jianhua Wu
Keyword(s):  
Electron Microscopy ◽  
Room Temperature ◽  
Solid Phase ◽  
Hydrothermal Process ◽  
Reaction Process ◽  
Solid Phase Reaction ◽  
Phase Reaction ◽  
Average Grain Size ◽  
Temperature And Humidity ◽  
Crystalline Water

NaGd(MoO4)2:Ln3+ (Ln = Eu, Tb) submicrometer phosphors have been synthesized by a composite method including the solid state reaction process at room temperature and the hydrothermal process. It is revealed that temperature and humidity have an influence on the reaction rate and that higher temperature and humidity can speed up the reaction process. Crystalline water is necessary for the solid phase reaction at room temperature. The x-ray diffraction (XRD) patterns indicate that NaGd(MoO4)2:Ln3+ (Ln = Eu, Tb) submicrometer phosphors crystallize well with the scheelite structure. Both scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images illustrate that the average grain size of NaGd(MoO4)2:Ln3+ is about 225 nm without conglomeration. The luminescent lifetime and quantum efficiency for NaGd(MoO4)2:Eu3+ are determined.

scholarly journals Rapid synthesis of cesium lead halide perovskite nanocrystals by l-lysine assisted solid-phase reaction at room temperature

RSC Advances ◽  
2020 ◽  
Vol 10 (56) ◽  
pp. 34215-34224
Author(s):  
Yi-Lin Hu ◽  
Qiu-Lin Wen ◽  
Zheng-Fen Pu ◽  
An-Yong Liu ◽  
Jun Wang ◽  
...  
Keyword(s):  
Room Temperature ◽  
Solid Phase ◽  
Reaction Process ◽  
Solid Phase Reaction ◽  
Phase Reaction ◽  
Rapid Synthesis ◽  
Perovskite Nanocrystals ◽  
Solid Phase Reactions ◽  
Halide Perovskite ◽  
Lead Halide

By comparing three different solid-phase reactions of perovskite powder synthesized using lysine, the reaction process and properties were studied.

Deposition of ZnO flowers on the surface of g-C3N4 by solid phase reaction

2018 ◽  
Vol 11 (01) ◽  
pp. 1850020 ◽  
Author(s):  
Baoyan Liang ◽  
Danhui Han ◽  
Changhong Sun ◽  
Wangxi Zhang ◽  
Qi Qin
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Room Temperature ◽  
Solid Phase ◽  
Solid Phase Reaction ◽  
Phase Reaction ◽  
Visible Photocatalytic Activity

ZnO/g-C3N4 photocatalysts were prepared by adopting room-temperature solid-phase grinding with Zn(CH3COO)2, NaOH, and g-C3N4 powders. ZnO grains with flower-like architectures were loaded on g-C3N4 thin flakes. The as-synthesized ZnO/g-C3N4 composite displayed highly visible photocatalytic activity during the degradation of methylene blue (MB).

scholarly journals Near Room Temperature Synthesis of Ceria-Zirconia Solid Solution by Solid Phase Reaction.

2000 ◽  
Vol 108 (1257) ◽  
pp. 473-477 ◽  
Author(s):  
Akihiko SUDA ◽  
Toshio KANDORI ◽  
Yoshio UKYO ◽  
Hideo SOBUKAWA ◽  
Masahiro SUGIURA
Keyword(s):  
Solid Solution ◽  
Room Temperature ◽  
Solid Phase ◽  
Solid Phase Reaction ◽  
Phase Reaction ◽  
Temperature Synthesis ◽  
Room Temperature Synthesis
Sign in / Sign up

Export Citation Format

Share Document