The effect of precipitation pH on thermal stability and structure of Ce 0.35 Zr 0.55 (LaPr) 0.1 O 2 oxides prepared by co-precipitation method

2017 ◽  
Vol 712 ◽  
pp. 431-436 ◽  
Author(s):  
Qi Wang ◽  
Meisheng Cui ◽  
Yongke Hou ◽  
Qiang Zhong ◽  
Mei Yue ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Precipitation Method ◽  
Precipitation Ph ◽  
Co Precipitation

A highly-efficient La–MnOx catalyst for propane combustion: the promotional role of La and the effect of the preparation method

2016 ◽  
Vol 6 (23) ◽  
pp. 8222-8233 ◽  
Author(s):  
Yujie Xie ◽  
Yun Guo ◽  
Yanglong Guo ◽  
Li Wang ◽  
Wangcheng Zhan ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Preparation Method ◽  
Deep Oxidation ◽  
Precipitation Method ◽  
Propane Combustion ◽  
Highly Efficient ◽  
Excellent Activity ◽  
Co Precipitation

The La0.4–MnOx catalyst prepared by using the co-precipitation method exhibited excellent activity and thermal stability for propane deep oxidation.

Investigation of the thermal stability of Mn ferrite particles synthesized by a modified co-precipitation method

2012 ◽  
Vol 56 (3) ◽  
pp. 568-572 ◽  
Author(s):  
ChunHui Dong ◽  
GaoXue Wang ◽  
Lei Shi ◽  
DangWei Guo ◽  
ChangJun Jiang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Precipitation Method ◽  
Co Precipitation ◽  
Thermal Stability Of

scholarly journals Preparation of Ceria-zirconia Mixed Oxides with Improved Thermal Stability for Three-way Catalysts by a Modified Co-precipitation Method

2017 ◽  
Vol 32 (3) ◽  
pp. 331 ◽  
Author(s):  
WU Qing-Feng ◽  
CUI Ya-Juan ◽  
ZHANG Hai-Long ◽  
ZHOU Yi ◽  
LAN Li ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Mixed Oxides ◽  
Precipitation Method ◽  
Co Precipitation

Ultrathin γ-Al2O3 nanofibers with large specific surface area and their enhanced thermal stability by Si-doping

RSC Advances ◽  
2015 ◽  
Vol 5 (67) ◽  
pp. 54053-54058 ◽  
Author(s):  
Fang Hu ◽  
Xiang Wu ◽  
Yamin Wang ◽  
Xiaoyong Lai
Keyword(s):  
Thermal Stability ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Parallel Flow ◽  
Precipitation Method ◽  
Large Specific Surface Area ◽  
Si Doping ◽  
Co Precipitation

Ultrathin boehmite nanofibers were synthesized via a parallel flow co-precipitation method and then transformed into γ-Al2O3 nanofibers by calcination.

Preparation of a novel red Rb2SiF6:Mn4+phosphor with high thermal stability through a simple one-step approach

2015 ◽  
Vol 3 (28) ◽  
pp. 7277-7280 ◽  
Author(s):  
Mu-Huai Fang ◽  
Hoang-Duy Nguyen ◽  
Chun Che Lin ◽  
Ru-Shi Liu
Keyword(s):  
Thermal Stability ◽  
High Thermal Stability ◽  
Precipitation Method ◽  
One Step ◽  
Co Precipitation

A new Rb2SiF6:Mn4+phosphor has been successfully synthesized through a one-step co-precipitation method.

Effect of modified layered double hydroxide on the flammability and mechanical properties of polypropylene

2018 ◽  
Vol 25 (1) ◽  
pp. 101-108 ◽  
Author(s):  
Mohamed Sh. Zoromba ◽  
Mohamed A. Nour ◽  
Hussam E. Eltamimy ◽  
Samir A. Abd El-Maksoud
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Layered Double Hydroxides ◽  
Sodium Stearate ◽  
Precipitation Method ◽  
Cone Calorimeter Test ◽  
Organically Modified ◽  
Copper Aluminum ◽  
Co Precipitation ◽  
Double Hydroxides

AbstractCopper-aluminum layered double hydroxides (Cu-LDHs) and nickel-aluminum layered double hydroxides (Ni-LDHs) were synthesized using co-precipitation method. LDHs were organically modified by long chain sodium stearate. Polypropylene (PP)/layered double hydroxides (LDHs) and polypropylene (PP)/organically-modified layered double hydroxides (m.Cu-LDHs or m.Ni-LDHs) were prepared through the melt bending of the PP with either nanosized LDHs or m.LDHs without any other additives. The effect of stearate on the dispersibility of LDHs was investigated by X-ray diffraction (XRD). The surface morphology of LDHs was also studied using scanning electron microscope (SEM), and the thermal stability properties of PP/LDHs composites were studied by thermogravimetric analysis (TGA). The mechanical properties of the PP/LDH composites, tensile strength, and modulus of elasticity were investigated. The flammability properties were investigated using the cone calorimeter test. The intercalation of modified LDHs was determined by XRD in the presence of stearate. Results showed that modified LDHs presented good disperasbility in the PP matrix. The thermal stability of PP has been improved by up to 6% using m.Ni-LDHS. Unmodified and modified nanosized LDHs decreased the fire growth rate of PP from 10.8 kW/m2.s to 4.1 kW/m2.s and 4.5 kW/m2.s, respectively.

Magnetic and dielectric properties of BiFeO3 nanoparticles

2015 ◽  
Vol 7 (2) ◽  
pp. 1393-1403
Author(s):  
Dr R.P VIJAYALAKSHMI ◽  
N. Manjula ◽  
S. Ramu ◽  
Amaranatha Reddy
Keyword(s):  
Diffuse Reflectance Spectrum ◽  
Precipitation Method ◽  
Secondary Phases ◽  
X Ray Diffraction ◽  
Bifeo3 Nanoparticles ◽  
Transmission Electron ◽  
Multiferroic Bifeo3 ◽  
Pure Phase ◽  
Simple Chemical ◽  
Co Precipitation

Single crystalline nano-sized multiferroic BiFeO3 (BFO) powders were synthesized through simple chemical co-precipitation method using polyethylene glycol (PEG) as capping agent. We obtained pure phase BiFeO3 powder by controlling pHand calcination temperature. From X-ray diffraction studies the nanoparticles were unambiguously identified to have a rhombohedrally distorted perovskite structure belonging to the space group of R3c. No secondary phases were detected. It indicates single phase structure. EDX spectra indicated the appearance of three elements Bi, Fe, O in 1:1:3. From the UV-Vis diffuse reflectance spectrum, the absorption cut-off wavelength of the BFO sample is around 558nm corresponding to the energy band gap of 2.2 eV. The size (60-70 nm) and morphology of the nanoparticles have been analyzed using transmission electron microscopy (TEM).   Linear M−H behaviour and slight hysteresis at lower magnetic field is observed for BiFeO3 nanoparticles from Vibrating sample magnetometer studies. It indicates weak ferromagnetic behaviour at room temperature. From dielectric studies, the conductivity value is calculated from the relation s = L/RbA Sm-1 and it is around 7.2 x 10-9 S/m.

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