Low-Temperature Synthesis of Calcium Hexaboride Powder via Transient Boron Carbide Formation

2015 ◽  
Vol 98 (9) ◽  
pp. 2724-2727 ◽  
Author(s):  
Masaki Kakiage ◽  
Shuhei Shiomi ◽  
Ikuo Yanase ◽  
Hidehiko Kobayashi
Keyword(s):  
Low Temperature ◽  
Boron Carbide ◽  
Carbide Formation ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
Calcium Hexaboride

scholarly journals Ethylene glycol assisted low-temperature synthesis of boron carbide powder from borate citrate precursors

2014 ◽  
Vol 2 (3) ◽  
pp. 268-274 ◽  
Author(s):  
Rafi-ud-din ◽  
G.H. Zahid ◽  
Z. Asghar ◽  
Muhammad Maqbool ◽  
Ejaz Ahmad ◽  
...  
Keyword(s):  
Low Temperature ◽  
Ethylene Glycol ◽  
Boron Carbide ◽  
Carbide Powder ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
Citrate Precursors

Low-temperature synthesis of high-purity boron carbide via an aromatic polymer precursor

2018 ◽  
Vol 33 (11) ◽  
pp. 1659-1670 ◽  
Author(s):  
Shujuan Wang ◽  
Yuefeng Li ◽  
Xiaolong Xing ◽  
Xinli Jing
Keyword(s):  
Low Temperature ◽  
Boron Carbide ◽  
High Purity ◽  
Polymer Precursor ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
Aromatic Polymer ◽  
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Abstract

scholarly journals Using non-equilibrium state in the MoO3-H-C system for low temperature synthesis of ultradispersed molybdenum carbide powders

2008 ◽  
Vol 2 (2) ◽  
pp. 97-102 ◽  
Author(s):  
M.P. Savyak ◽  
I.V. Uvarova ◽  
T.M. Yarmola
Keyword(s):  
Low Temperature ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Molybdenum Carbide ◽  
Molybdenum Trioxide ◽  
Reduction Process ◽  
Carbide Formation ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis

Pd additives and atomic hydrogen can accelerate kinetic processes in molybdenum reduction from molybdenum trioxide with hydrogen at 350?C in the presence of carbon. Such a low temperature reduction process (starting temperature 300-350?C) promotes the formation of a thermodynamically unstable nanodispersed phase with the specific surface area of 280 m2/g, which may be related to the formation of the intermediate cubic molybdenum suboxide Mo1-xO, responsible for the preservation of the MoO3 faceting. The specific surface area of 280 m2/g corresponds to the particle size ~3 nm. The phase transformation leading to the formation of Mo2C in the MoO3-Pd-H2-C system at a relatively low temperature (650?C) is the result of relaxation of the high free energy in the thermodynamically unstable system. The carbide formation process at such a low temperature yields carbide with the specific surface area from 4 to 40 m2/g (depending on the carbide-forming component), which can be easy sintered. The morphology of this carbide inherits the faceting of the initial whiskerous trioxide molybdenum. The microhardness of the sintered samples is significantly higher than that of carbide produced traditionally at high temperature.

Boron carbide nanowires: low temperature synthesis and structural and thermal conductivity characterization

2012 ◽  
Vol 22 (19) ◽  
pp. 9853 ◽  
Author(s):  
Zhe Guan ◽  
Timothy Gutu ◽  
Juekuan Yang ◽  
Yang Yang ◽  
Alfred A. Zinn ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Low Temperature ◽  
Boron Carbide ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis
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