scholarly journals Fine defective structure of silicon carbide powders obtained from different starting materials

2006 ◽  
Vol 38 (2) ◽  
pp. 177-181 ◽  
Author(s):  
T.V. Tomila ◽  
M.V. Vlasova ◽  
M.G. Kakazey ◽  
K.L. Vyshnyakova ◽  
A.V. Ragulya ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Carbon Black ◽  
Silicic Acid ◽  
Lattice Parameter ◽  
Ir Absorption ◽  
Defective Structure ◽  
Hydrated Cellulose ◽  
Sic Particles ◽  
Acid Gel ◽  
Absorption Characteristics

The fine defective structure of silicon carbide powders obtained from silicic acid-saccharose, aerosil-saccharose, aerosil-carbon black, and hydrated cellulose-silicic acid gel systems was investigated. The relation between IR absorption characteristics and the microstructure of SiC particles obtained from different starting materials was established. The numerical relationship between the lattice parameter a and the frequency ?TO is presented.

scholarly journals Синтез наночастиц карбида кремния методом лазерного пиролиза смеси моносилана и ацетилена

2020 ◽  
Vol 54 (11) ◽  
pp. 1233
Author(s):  
И.А. Ершов ◽  
Л.Д. Исхакова ◽  
В.И. Красовский ◽  
Ф.О. Милович ◽  
С.И. Расмагин ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Gas Phase ◽  
Reaction Zone ◽  
Phase Reaction ◽  
Synthesis Reaction ◽  
Flow Ratio ◽  
Laser Synthesis ◽  
Gas Phase Reaction ◽  
Silicon Carbide Nanoparticles ◽  
Sic Particles

The conditions of the laser-enhanced synthesis reaction of silicon carbide nanoparticles are determined and the nanoparticles are characterized. The gas-phase reaction of laser synthesis of SiC particles is observed at SiH4/C2H2 flow ratio in the range of 1.6-3.2. The temperature in the reaction zone was ~1400--1500ºC. Silicon carbide nanoparticles ~6 nm in diameter are produced and their composition is studied.

Gelcasting of Aqueous Silicon Carbide / Carbon Black Slurry

2007 ◽  
pp. 1291-1296
Author(s):  
Yu Feng Chen ◽  
Hua Wang ◽  
Jie Tang ◽  
Hai Lin Liu ◽  
Qi Sheng Fan
Keyword(s):  
Silicon Carbide ◽  
Carbon Black ◽  
Aqueous Silicon

Electrochromic Poly(acetylene)s with Switchable Visible/Near-IR Absorption Characteristics

2013 ◽  
Vol 35 (2) ◽  
pp. 210-213 ◽  
Author(s):  
Anja C. Pauly ◽  
C. Daniel Varnado ◽  
Christopher W. Bielawski ◽  
Patrick Theato
Keyword(s):  
Ir Absorption ◽  
Near Ir ◽  
Absorption Characteristics

SiC Platelets Synthesized by Powder-Heating Technique

2007 ◽  
Vol 336-338 ◽  
pp. 939-941
Author(s):  
Yong Qiang Meng ◽  
Zhi Min Bai ◽  
Chang Hong Dai ◽  
Bao Bao Zhang
Keyword(s):  
Silicon Carbide ◽  
Reaction Time ◽  
Carbon Black ◽  
Raw Materials ◽  
Low Cost ◽  
Average Diameter ◽  
New Method ◽  
Conventional Heating ◽  
High Yield ◽  
Sio2 Powder

A new method for producing silicon carbide platelets with low cost and high yield was introduced. The silicon carbide platelets were synthesized by powder-heating techniques with carbon black and SiO2 powder as raw materials and CoCl2 as catalyst. The starting mixtures were heated at a temperature in the range of 1800-2000°C for the duration of about 2-4h to produce substantially completely unagglomerated silicon carbide platelets with a thickness of 5-20μm and the average diameter of 50-200μm. Compared to the conventional heating, the powder-heating technique is advantageous of less investment on equipment, easy to manufacture and convenient to operate. Furthermore, it is very suitable for realizing the scaled production because of the lower synthesizing temperature, shorter reaction time and greater output.

Viscosity of the Silicic Acid Gel-Forming Mixtures

1932 ◽  
Vol 36 (5) ◽  
pp. 1384-1390 ◽  
Author(s):  
Mata Prasad ◽  
S. M. Mehta ◽  
J. B. Desai
Keyword(s):  
Silicic Acid ◽  
Acid Gel

Synthesis of Titanium Carbide by Heat Treatment of TiH2 and Carbon Black Powders

2007 ◽  
Vol 534-536 ◽  
pp. 225-228 ◽  
Author(s):  
In Sup Ahn ◽  
Sung Yeal Bae ◽  
Ho Jung Cho ◽  
Chul Jin Kim ◽  
Dong Kyu Park
Keyword(s):  
Particle Size ◽  
Carbon Black ◽  
Metal Matrix ◽  
High Hardness ◽  
Heat Treating ◽  
Carbon Composite ◽  
Lattice Parameter ◽  
Matrix Composites ◽  
Composite Powders ◽  
Graphite Phase

TiC cermet is widely used for working dies with a high hardness and tool materials. In this research, we attempted to produce submicron sized TiC powders from the ball milled TiH2 and carbon black mixture by thermal treatment. The titanium hydride and carbon composite powders were milled under argon atmosphere for 7 hours at various ball to powder ratios. At the initial stage, an increase in particle size was observed, and graphite phase disappered. The TiC phase of 300nm mean particle size was obtained by milling for 5 hours. As a result, its morphologies were excessively agglomerated. At the heat treating temperature of 500°C, TiH2 phase transformed to Ti completely and the complete TiC of lattice parameter 0.431 nm was formed when the temperature reached 1000°C. Metal matrix composites(MMCs) based on the Fe-TiC system can be synthesized by spark plasma sintering. Specimen formed sintering Fe-TiC powders display a microstructure of uniformly dispersed TiC grain in a continuous metal matrix.

Measurement of the IR absorption induced by visible radiation in amorphous silicon and silicon carbide thin films by an in-guide technique

2008 ◽  
Vol 30 (8) ◽  
pp. 1240-1243 ◽  
Author(s):  
Maria Arcangela Nigro ◽  
Massimo Gagliardi ◽  
Francesco Giuseppe Della Corte
Keyword(s):  
Thin Films ◽  
Silicon Carbide ◽  
Amorphous Silicon ◽  
Ir Absorption ◽  
Visible Radiation
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