scholarly journals Characterization of the dynamic densification behavior of cerium dioxide powders as a function of green density

2018 ◽  
Author(s):  
Travis J. Voorhees ◽  
Gregory B. Kennedy ◽  
D. Anthony Fredenburg ◽  
Naresh N. Thadhani
Keyword(s):  
Cerium Dioxide ◽  
Densification Behavior ◽  
Green Density ◽  
Dynamic Densification

Synthesis and characterization of organosoluble cerium dioxide

1983 ◽  
Vol 94 (2) ◽  
pp. 277-283 ◽  
Author(s):  
Harry G. Brittain ◽  
Peter S. Gradeff
Keyword(s):  
Cerium Dioxide ◽  
Synthesis And Characterization

Characterization of a cerium dioxide powder from its equilibrium with water vapour

1991 ◽  
Vol 186 (2) ◽  
pp. 273-283 ◽  
Author(s):  
M. Prin ◽  
M. Pijolat ◽  
M. Soustelle ◽  
O. Touret
Keyword(s):  
Water Vapour ◽  
Cerium Dioxide ◽  
Dioxide Powder

Synthesis and Characterization of Nanostructured Cerium Dioxide Thin Films Deposited by Ultrasonic Spray Pyrolysis

2010 ◽  
Vol 93 (1) ◽  
pp. 155-160 ◽  
Author(s):  
Mario F. García-Sánchez ◽  
Armando Ortiz ◽  
Guillermo Santana ◽  
Monserrat Bizarro ◽  
Juan Peña ◽  
...  
Keyword(s):  
Thin Films ◽  
Spray Pyrolysis ◽  
Cerium Dioxide ◽  
Ultrasonic Spray Pyrolysis ◽  
Synthesis And Characterization ◽  
Ultrasonic Spray

Characterization of Doped Titanium Oxide Varistor Powder Processed with Latex Binder

2015 ◽  
Vol 1115 ◽  
pp. 133-136
Author(s):  
Shahida Begum ◽  
Ida Rasyada ◽  
Arvin Panimeerselvam
Keyword(s):  
Grain Size ◽  
Silicon Oxide ◽  
Ceramic Materials ◽  
Sem Analysis ◽  
Electrical Performance ◽  
Green Density ◽  
Micro Hardness ◽  
Radial Shrinkage ◽  
Average Grain Size

In the processing of semiconducting electro ceramic materials the use of appropriate binder can lead to improve characteristics of powder which will reduce density gradient in the green body during compaction. The binder system is anticipated to have an influence on the grain growth and microstructure which in turn affect the electrical performance. To investigate this phenomenon, TiO2 powder doped with tungsten oxide (WO3), silicon oxide (SiO2) and bismuth oxide (Bi2O3) was processed with and without various percent of latex binder. The prepared samples were characterized by evaluating the physical properties like green density, fired density, axial and radial shrinkage, micro hardness and compressive strength. It was observed that TiO2 processed with latex binder exhibited higher green density and less axial and radial shrinkage compared to powder processed without binder. However, the binder level did not have any significant influence on the other characteristics of varistor discs. SEM analysis indicated that the average grain size was also influenced by the percent of binder used and but the higher average grain size was obtained for discs without any binder.

Characterization of Sputtered Cerium Dioxide Thin Films

1994 ◽  
Vol 355 ◽  
Author(s):  
Shuwenguo S. N. Jacobsen ◽  
U. Helmersson ◽  
K. Järrendahl ◽  
L. D. Madsen ◽  
P. Tengvall ◽  
...  
Keyword(s):  
Thin Films ◽  
Cerium Dioxide

Development and characterization of bronze-Cr-Ni composites produced by powder metallurgy

2015 ◽  
Vol 22 (4) ◽  
Author(s):  
Aykut Canakci ◽  
Temel Varol ◽  
Hamdullah Cuvalci ◽  
Fatih Erdemir ◽  
Serdar Ozkaya
Keyword(s):  
Green Density ◽  
Contact Materials ◽  
X Ray ◽  
Ni Content ◽  
Compact Pressure ◽  
Electrical Conductivities ◽  
Lower Porosity ◽  
Microstructure Density ◽  
Hardness Values

AbstractIn this study, the bronze-Cr-Ni composites were prepared by means of the powder metallurgical method. The influence of the composition and compact pressure on microstructure, density, hardness and electrical conductivity was examined. Scanning electron microscope (SEM) and energy dispersive X-ray analysis (EDX) were used to analyze the microstructure of the contact materials. The results showed that density of the bronze-Cr-Ni composites decreased with increasing Ni content. Increasing compact pressure led to lower porosity and consequently improved the density of bronze-Cr-Ni composites. The relative green density increased from 78% to 95% with the increase in the compact pressure from 200 MPa to 800 MPa. The hardness values showed a decrease from 95.1 BHN to 71.6 BHN by the addition of Ni from 1 wt% to 5 wt% at 800 MPa. It was found that addition of Ni at 1 wt% was required to achieve increased hardness and sufficient conductivity for bronze-Cr-Ni composites. The electrical conductivities of contact materials containing 3 wt% Ni and 5 wt% Ni was lower than that of 1 wt% Ni.

Preparation and Characterization of Conductive Polyaniline/Cerium Dioxide Composites

2010 ◽  
Vol 663-665 ◽  
pp. 686-689
Author(s):  
Hui Huang ◽  
Zhong Cheng Guo
Keyword(s):  
Fourier Transform ◽  
Cerium Dioxide ◽  
In Situ Polymerization ◽  
Ceo2 Nanoparticles ◽  
Pure Pani ◽  
X Ray Diffraction ◽  
Maximum Conductivity ◽  
Conductive Polyaniline

Conductive polyaniline/cerium dioxide (PANI/CeO2) composites have been synthesized by in-situ polymerization of aniline in the presence of CeO2 nanoparticles. The structure and thermal stability of obtained composites were characterized by Fourier-transform infrared spectra (FTIR), Fourier-transform Raman spectra (FT-Raman), X-ray diffraction (XRD) and thermogravimetric analysis (TGA). The results showed that PANI and CeO2 nanoparticles were not simply blended, and a strong interaction existed at the interface of CeO2 and PANI. In the PANI/CeO2 composite, the degree crystallinity of PANI increased and diffraction pattern of CeO2 was amorphous. And that the composites were more thermally stable than that of the pure PANI. Electrical conductivity measurements indicated that the conductivity of PANI/CeO2 composites was much higher than that of the pure PANI and the maximum conductivity obtained was 11.68 S/cm at 17.5 wt% of CeO2.

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