Silicon carbide whiskers from rice husk: role of catalysts

Composites ◽  
1990 ◽  
Vol 21 (1) ◽  
pp. 91
Keyword(s):  
Silicon Carbide ◽  
Rice Husk ◽  
Silicon Carbide Whiskers

scholarly journals Simultaneous effects of rice husk silica and silicon carbide whiskers on the mechanical properties and morphology of sodium geopolymer

2020 ◽  
Vol 54 (29) ◽  
pp. 4611-4620 ◽  
Author(s):  
Akm Samsur Rahman ◽  
Chirag Shah ◽  
Nikhil Gupta
Keyword(s):  
Silicon Carbide ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Silica Nanoparticles ◽  
Rice Husk ◽  
Silicon Carbide Whiskers ◽  
Short Beam ◽  
Spherical Silica ◽  
Beam Shear ◽  
Strength Improvement

The current research is focused on developing a geopolymer binder using rice husk ash–derived silica nanoparticles. Four types of rice husks were collected directly from various rice fields of Bangladesh in order to evaluate the pozzolanic activity and compatibility of the derived rice husk ashes with precursors of sodium-based geopolymers. Silicon carbide whiskers were introduced into sodium-based geopolymers in order to evaluate the response of silicon carbide whiskers to the interfacial bonding and strength of sodium-based geopolymers along with rice husk ashes. Compression, flexural and short beam shear tests were performed to investigate the synergistic effect of rice husk ashes–derived silica and commercially available silicon carbide whiskers. Results show that rice husk ashes–derived spherical silica nanoparticles reduced nano-porosity of the geopolymers by ∼20% and doubled the compressive strength. The simultaneous additions of rice husk ashes and silicon carbide whiskers resulted in flexural strength improvement by ∼27% and ∼97%, respectively. The increase in compressive strength due to the inclusion of silica nanoparticles is related to the reduction in porosity. The increase in flexural strength due to simultaneous inclusion of silica and silicon carbide whiskers suggest that silica particles are compatible with the metakaolin-based geopolymers, which is effective in consolidation. Finally, microscopy suggest that silicon carbide whiskers are effective in increasing bridged network and crack resistance.

Effect of catalysts and temperature on silicon carbide whiskers formation from rice husk

1991 ◽  
Vol 10 (4) ◽  
pp. 227-229 ◽  
Author(s):  
Ajoy Kumar Ray ◽  
Gyananjan Mahanty ◽  
Ambar Ghose
Keyword(s):  
Silicon Carbide ◽  
Rice Husk ◽  
Silicon Carbide Whiskers

scholarly journals Increase in the yield of silicon carbide whiskers from rice husk

1987 ◽  
Vol 9 (4) ◽  
pp. 295-303 ◽  
Author(s):  
B V Radhakrishna Bhat ◽  
G P Sanghi
Keyword(s):  
Silicon Carbide ◽  
Rice Husk ◽  
Silicon Carbide Whiskers

High Yield Silicon Carbide Whiskers from Rice Husk Ash and Graphene: Growth Method and Thermodynamics

2019 ◽  
Vol 7 (23) ◽  
pp. 19027-19033 ◽  
Author(s):  
Jingpeng Chen ◽  
Qingqiang Kong ◽  
Zhuo Liu ◽  
Zhihong Bi ◽  
Hui Jia ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
High Yield ◽  
Graphene Growth ◽  
Silicon Carbide Whiskers ◽  
Growth Method

scholarly journals Synergy Effects in Electromagnetic Properties of Phosphate Ceramics with Silicon Carbide Whiskers and Carbon Nanotubes

2019 ◽  
Vol 9 (20) ◽  
pp. 4388 ◽  
Author(s):  
Artyom Plyushch ◽  
Jan Macutkevič ◽  
Polina Kuzhir ◽  
Aliaksei Sokal ◽  
Konstantin Lapko ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Silicon Carbide ◽  
Wide Frequency Range ◽  
Electromagnetic Properties ◽  
Aluminium Phosphate ◽  
Silicon Carbide Whiskers ◽  
Synergy Effects ◽  
Multi Walled Carbon Nanotubes ◽  
The Difference ◽  
Walled Carbon Nanotubes

Hybrid composite materials based on an aluminium phosphate matrix with silicon carbide whiskers and multi-walled carbon nanotubes were studied in a wide frequency range (20 Hz to 36 GHz). It was demonstrated, that the addition of the silicon carbide whiskers enhances the dielectric permittivity and conductivity. This was explained by the difference in tunnelling parameters. Hybrid ceramics with nanotubes and whiskers also exhibits substantially improved electromagnetic shielding properties. The hybrid ceramics with 10 wt. % silicon carbide whiskers and a 1 mm thick 1.5 wt. % carbon nanotube layer, show higher than 50% absorption of electromagnetic radiation.

Catalyst-free hybridization of silicon carbide whiskers and expanded graphite by vapor deposition method

2015 ◽  
Vol 41 (10) ◽  
pp. 14359-14366 ◽  
Author(s):  
Qinghu Wang ◽  
Yawei Li ◽  
Shengli Jin ◽  
Shaobai Sang
Keyword(s):  
Silicon Carbide ◽  
Vapor Deposition ◽  
Expanded Graphite ◽  
Deposition Method ◽  
Catalyst Free ◽  
Silicon Carbide Whiskers

The role of H3PO4in the preparation of activated carbon from NaOH-treated rice husk residue

RSC Advances ◽  
2015 ◽  
Vol 5 (41) ◽  
pp. 32626-32636 ◽  
Author(s):  
Yaxin Li ◽  
Xian Zhang ◽  
Ruiguang Yang ◽  
Guiying Li ◽  
Changwei Hu
Keyword(s):  
Activated Carbon ◽  
Rice Husk

H3PO4promoted the decomposition of some species to form CO2and reacted with PBTRHR to form PH3.

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