scholarly journals Improvement in varistor properties of CaCu3Ti4O12 ceramics by chromium addition

2020 ◽  
Vol 41 ◽  
pp. 12-20 ◽  
Author(s):  
Edson Cezar Grzebielucka ◽  
João Frederico Haas Leandro Monteiro ◽  
Eder Carlos Ferreira de Souza ◽  
Christiane Philippini Ferreira Borges ◽  
André Vitor Chaves de Andrade ◽  
...  
Keyword(s):  
Chromium Addition

IN-838

Alloy Digest ◽  
1975 ◽  
Vol 24 (5) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Nickel Alloy ◽  
Sea Water ◽  
Heat Treating ◽  
Chromium Addition

Abstract IN-838 is a wrought copper-15% nickel alloy with a controlled chromium addition for improved corrosion resistance in flowing sea water. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-297. Producer or source: Brass mills.

scholarly journals Hot Tearing of Machinability Improved 2xxx Aluminum Alloy of High Tin Content with Manganese and Chromium Addition

2008 ◽  
Vol 49 (2) ◽  
pp. 324-330 ◽  
Author(s):  
Hiromi Nagaumi ◽  
Satoru Suzuki ◽  
Toshimitsu Okane ◽  
Takateru Umeda
Keyword(s):  
Aluminum Alloy ◽  
Hot Tearing ◽  
Chromium Addition ◽  
Tin Content

Effect of chromium addition on the structural, morphological and magnetic properties of nano-crystalline cobalt ferrite system

2012 ◽  
Vol 38 (8) ◽  
pp. 6671-6676 ◽  
Author(s):  
Yüksel Köseoğlu ◽  
Mousa Ibrahim Oleiwi Oleiwi ◽  
Resul Yilgin ◽  
Abdullah N. Koçbay
Keyword(s):  
Magnetic Properties ◽  
Cobalt Ferrite ◽  
Chromium Addition ◽  
Nano Crystalline ◽  
Ferrite System

The Effect of Chromium on the Optical Properties and Photoactivity of Nano-Particulate Rutile

2012 ◽  
Vol 554-556 ◽  
pp. 502-506 ◽  
Author(s):  
Li Wei Wang ◽  
Terry A. Egerton
Keyword(s):  
Optical Properties ◽  
Photocatalytic Activity ◽  
Reflectance Spectroscopy ◽  
Electron Trapping ◽  
Electron Hole ◽  
High Chromium ◽  
Chromium Doping ◽  
Chromium Addition ◽  
Co Precipitation ◽  
Hole Recombination

Chromium doped rutile TiO2was synthesized by either co-precipitation or impregnation (surface-doping) and characterized by XRD and reflectance spectroscopy. Chromium addition did not change the TiO2structure nor did the structure of the co-precipitated products differ from that of the impregnated samples. However, chromium doping moved the absorption of both sets of products into the visible and significantly affected the TiO2photocatalytic activity for isopropanol (IPA) oxidation. At high chromium concentrations the photoactivity of the co-precipitated samples was reduced by a larger amount than that of the impregnated samples; this was attributed to a higher concentration of Cr3+ions in the rutile lattice. Unexpectedly, increased photoactivity was measured for low Cr levels of surface-doped rutile. This may be caused by increased electron-trapping, at surface Cr6+ions, and correspondingly reduced, electron-hole recombination.

scholarly journals On the Support Effect and the Cr Promotion of Co Based Catalysts for the Acetic Acid Steam Reforming

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 133
Author(s):  
Marta Cortese ◽  
Concetta Ruocco ◽  
Vincenzo Palma ◽  
Pedro J. Megía ◽  
Alicia Carrero ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Mesoporous Silica ◽  
Steam Reforming ◽  
Supported Catalysts ◽  
Support Effect ◽  
The Other ◽  
Hexagonal Mesoporous Silica ◽  
Chromium Addition ◽  
Cr Addition ◽  
The Impact

This work focuses on the support effect of the performances of Co based catalysts for acetic acid steam reforming. SBA-15, a well ordered hexagonal mesoporous silica structure, and CeO2 have been selected as the supports, with the impact of chromium addition also being investigated. Better acetic acid steam reforming performances have been recorded for CeO2 compared to SBA-15 supported catalysts and, in particular, the 7Co/CeO2 catalyst showed the highest values of acetic acid conversions with enhanced H2 yields below 480 °C, in comparison to the other investigated catalytic formulations. In addition, more pronounced coke depositions and acetone concentrations have been obtained with CeO2 supported catalysts, due to the tendency of ceria to catalyse the ketonization reaction. Chromium addition to Co/SBA-15 catalysts led to an enhancement in the activity towards acetic acid steam reforming, while on CeO2 supported catalysts no improvement in the catalysts’ activity was observed. However, on both SBA-15 and CeO2 supported catalysts, Cr addition reduced the amount of coke deposited on the catalysts surface.

Effects of chromium addition on structure and mechanical properties of Ti–10Zr alloy

2009 ◽  
Vol 484 (1-2) ◽  
pp. 524-528 ◽  
Author(s):  
Chung-Hsiao Cheng ◽  
Hsueh-Chuan Hsu ◽  
Shih-Ching Wu ◽  
Hsiao-Wei Wang ◽  
Wen-Fu Ho
Keyword(s):  
Mechanical Properties ◽  
Chromium Addition

scholarly journals Development of NiAl-based intermetallic alloys: effect of chromium addition

1995 ◽  
Vol 192-193 ◽  
pp. 356-363 ◽  
Author(s):  
R. Tiwari ◽  
S.N. Tewari ◽  
R. Asthana ◽  
A. Garg
Keyword(s):  
Intermetallic Alloys ◽  
Chromium Addition
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