scholarly journals A novel green nonaqueous sol-gel process for preparation of partially stabilized zirconia nanopowder

2017 ◽  
Vol 11 (3) ◽  
pp. 220-224 ◽  
Author(s):  
Guo Feng ◽  
Weihui Jiang ◽  
Jianmin Liu ◽  
Quan Zhang ◽  
Qian Wu ◽  
...  
Keyword(s):  
Bending Strength ◽  
Sol Gel ◽  
Sintered Sample ◽  
Zirconium Oxychloride ◽  
Bet Surface Area ◽  
Nanometer Scale ◽  
Stabilized Zirconia ◽  
Zirconia Powder ◽  
Sol Gel Process ◽  
Sintering Behaviour

A novel green nonaqueous sol-gel process was developed to prepare 3mol% Y2O3-doped ZrO2 nanopowder from zirconium oxychloride and without need for washing of the obtained particles. It was shown that highly dispersive nanometer-scale zirconia powder with the particle size of 15-25 nm and BET surface area of 41.2m2/g can be prepared. The sintering behaviour was also investigated. Density of the translucent body sintered at 1400?C is 98.7 ? 0.3% of its theoretical density and the surface and cross section areas are dense without holes or other defects. The bending strength of the sintered sample is 928 ? 64MPa.

Palladium-Silica Organic-Inorganic Membrane Materials via a Sol-Gel Process: Preparation and Properties Calcined under H2 Atmosphere

2017 ◽  
Vol 727 ◽  
pp. 889-894
Author(s):  
Jing Yang ◽  
Lin Yu Li ◽  
Hai Yun Hou ◽  
Zhi Tong
Keyword(s):  
Particle Size ◽  
Sol Gel ◽  
Total Pore Volume ◽  
Energy Dispersive Spectrum ◽  
Bet Surface Area ◽  
Molar Ratio ◽  
Inorganic Membrane ◽  
X Ray Diffraction ◽  
Membrane Materials ◽  
Sol Gel Process

Pd-doped SiO2 organic-inorganic membrane materials were prepared via a sol-gel process. The sol stability is characterized by sol particle size and zeta potential analysis. And the properties of the Pd-doped SiO2 organic-inorganic membrane materials are investigated by X-ray diffraction (XRD), fourier transform infrared (FTIR), energy dispersive spectrum (EDS) analysis and N2 absorption-adsorption measurement. The results showed that the sol particle size distributions are relatively narrow. With the increase of Pd content, the sol particle sizes slightly increase and the zeta potentials decreases until the palladium/tetraethylorthosilicate molar ratio closes to the isoelectric point. After calcined at 350 °C under H2 atmosphere, the added PdCl2 is reduced to metallic Pd0 completely, and the hydrophobic Si−CH3 groups exist in the SiO2 network. The Pd atoms have a lower concentration on the surface and more Pd atoms embedded in the SiO2 matrix. The Pd-doped SiO2 membrane materials calcined at 350 °C with a palladium/tetraethylorthosilicate molar ratio of 0.15 exhibit large BET surface area (up to 683.36 m2/g) and total pore volume (up to 0.386 cm3/g), as well as a mean pore diameter of about 2.26 nm.

Electrochemical behaviour of ceramic yttria stabilized zirconia on carbon steel synthesized via sol–gel process

2009 ◽  
Vol 483 (1-2) ◽  
pp. 437-441 ◽  
Author(s):  
M.A. Domínguez Crespo ◽  
A. García Murillo ◽  
A.M. Torres-Huerta ◽  
C. Yañez-Zamora. ◽  
F.de.J. Carrillo-Romo
Keyword(s):  
Carbon Steel ◽  
Electrochemical Behaviour ◽  
Sol Gel ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Sol Gel Process

scholarly journals Synthesis of SnO2 nanopowders by a sol-gel process using propanol-isopropanol mixture

2008 ◽  
Vol 6 (4) ◽  
pp. 651-656 ◽  
Author(s):  
Ali Hassanzadeh ◽  
Behrang Moazzez ◽  
Hossein Haghgooie ◽  
Mohsen Nasseri ◽  
Mir Golzan ◽  
...  
Keyword(s):  
Sol Gel ◽  
Nanometer Scale ◽  
Preparation Process ◽  
X Ray ◽  
Selected Area Electron Diffraction ◽  
Transmission Electron ◽  
Sol Gel Process ◽  
Ft Ir ◽  
Sno2 Powder ◽  
Sol Gel Synthesis

AbstractA simple sol-gel process is proposed for synthesizing SnO2 nanopowders utilizing normal propanol and isopropanol mixture instead of just using normal alcohols such as ethanol, propanol or butanol for Sol preparation. No surfactant was used in this Sol preparation process. The structure of sol is studied by FT-IR-ATR technique. On altering propanol to isopropanol ratio, three different nanopowders were obtained. X-ray powder diffraction, high-resolution transmission electron microscopy (HRTEM), selected area electron diffraction pattern (SAED) and BET techniques were used to characterize prepared powders. Results show that smaller grain size was obtained via altering alcohols ratio. In addition, Merck commercial SnO2 powder was also used as a reference material for comparing purposes; because it has nanometer scale (ca. 60 nm). HRTEM images show that obtained nanopowders were polycrystalline and their average diameters fall into the range of 6–80 nm. Finally, the effect of alkoxide ligand size through sol-gel synthesis on product particle size is discussed.

The thermal behavior of 8mol% yttria-stabilized zirconia nanocrystallites prepared by a sol–gel process

2005 ◽  
Vol 351 (49-51) ◽  
pp. 3709-3715 ◽  
Author(s):  
Yueh-Hsun Lee ◽  
Chih-Wei Kuo ◽  
I-Ming Hung ◽  
Kuan-Zong Fung ◽  
Moo-Chin Wang
Keyword(s):  
Thermal Behavior ◽  
Sol Gel ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Sol Gel Process

Synthesis of partially stabilized zirconia by a sol-gel process

1995 ◽  
Vol 22 (1-2) ◽  
pp. 71-75 ◽  
Author(s):  
G.V.Rama Rao ◽  
K.N. Ramakrishnan ◽  
S. Venkadesan ◽  
S.L. Mannan
Keyword(s):  
Sol Gel ◽  
Stabilized Zirconia ◽  
Partially Stabilized Zirconia ◽  
Sol Gel Process

Genesis and Growth of Nanoparticles during Sol-Gel Synthesis

2003 ◽  
Vol 788 ◽  
Author(s):  
Nan Yao ◽  
King Lun Yeung ◽  
Guoxing Xiong ◽  
Shishan Sheng
Keyword(s):  
Sol Gel ◽  
Nanometer Scale ◽  
In Situ Observation ◽  
Sol Gel Process ◽  
Silica Alumina ◽  
The Rich ◽  
Morphological Transformations ◽  
Sol Gel Synthesis ◽  
Gel Network

ABSTRACTIn situ observation of the genesis and growth of silica-alumina structures during the sol-gel process has been carried out. Although the gross structure of the gel network is kinetically stabilized, in situ AFM study reveals that at nanometer scale, the internal structure of the gel is dynamic as shown by the rich and complex morphological transformations.

Facile preparation of well-defined macroporous yttria-stabilized zirconia monoliths via sol–gel process accompanied by phase separation

2016 ◽  
Vol 23 (4) ◽  
pp. 867-875 ◽  
Author(s):  
Xingzhong Guo ◽  
Jie Song ◽  
Jing Ren ◽  
Fanger Yang ◽  
Kazuyoshi Kanamori ◽  
...  
Keyword(s):  
Phase Separation ◽  
Sol Gel ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Sol Gel Process ◽  
Facile Preparation
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