Synthesis of .BETA.-SiAlON Powder by Carbothermal Reduction and Nitridation(3). Reaction Process of .BETA.-SiAlON (Z=3).

β-Sialon powder was synthesized by in-situ carbothermal reduction-nitridation process, with fly ash and carbon black as raw materials. The influence of raw materials composition on synthesis process was investigated, and the phase composition and microstructure of the synthesized products were characterized by X-ray diffraction and scanning electronic microscope. The carbothermal reduction-nitridation reaction process was also discussed. It was found that increasing carbon content in a sample could promote the decomposition of mullite in fly ash and the formation of β-Sialon. The β-Sialon could be synthesized at 1550°C for 6h by heating the sample with the mass ratio of fly ash to carbon black of 100:56. The β-Sialon as-received in this study existed as granular with an average particle size of about 2μm. The carbothermal reduction-nitridation reaction process consisted of the nitridation processes of mullite, SiO2and Al2O3in fly ash as well as the conversion process of X-Sialon to β-Sialon.

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Preparation and Formation Mechanism of Elongated (Ca,Dy)-α-Sialon Powder via Carbothermal Reduction and Nitridation

Journal of the American Ceramic Society ◽

10.1111/j.1551-2916.2012.05145.x ◽

2012 ◽

Vol 95 (6) ◽

pp. 1871-1877 ◽

Cited By ~ 17

Author(s):

Juntong Huang ◽

Heping Zhou ◽

Zhaohui Huang ◽

Guanghua Liu ◽

Minghao Fang ◽

...

Keyword(s):

Formation Mechanism ◽

Carbothermal Reduction ◽

Sialon Powder

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Carbothermal Reduction and Nitridation of Çanakkale Origin Kaolin for SiAlON Powder Production

Materials Science Forum - Nitrides and Oxynitrides III ◽

10.4028/0-87849-439-1.169 ◽

2007 ◽

pp. 169-174

Author(s):

Zafer Tatli ◽

Adem Demir ◽

F. Caliskan

Keyword(s):

Carbothermal Reduction ◽

Powder Production ◽

Sialon Powder

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Synthesis Ca-α-SiAlON powder by carbothermal reduction nitridation of colloidal sol-gel derived powder precursor

Ceramics International ◽

10.1016/j.ceramint.2019.05.320 ◽

2019 ◽

Vol 45 (14) ◽

pp. 17567-17573 ◽

Cited By ~ 1

Author(s):

M. Amin ◽

N. Ehsani ◽

R. Mozafarinia

Keyword(s):

Carbothermal Reduction ◽

Sol Gel ◽

Powder Precursor ◽

Sialon Powder

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Preparation of Ultrafine β-Sialon Powder by Citrate Sol-Gel and Carbothermal Reduction Nitridation

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.336-338.927 ◽

2007 ◽

Vol 336-338 ◽

pp. 927-929 ◽

Cited By ~ 1

Author(s):

Hai Jun Zhang ◽

Hai Tang Zhang ◽

Jin Qi Miao ◽

Zi Liang Wang ◽

Quan Li Jia ◽

...

Keyword(s):

Particle Size ◽

Isoelectric Point ◽

Carbothermal Reduction ◽

Sol Gel ◽

Formation Temperature ◽

Nitriding Temperature ◽

Mean Particle Size ◽

The Mean ◽

Sialon Powder ◽

Crystal Seed

Ultrafine β-sialon powder is synthesized by citrate sol-gel and carbothermal reduction and nitridation (CRN) process. The presence of small amounts of β-sialon as crystal seed can obviously accelerate the formation of final β-sialon product and lower its formation temperature. The effects of nitriding temperature on the formation of the final β-sialon are investigated. The mean particle size of the prepared β-sialon powder is 100 ~ 150 nm. The β-sialon precursor gel and the ultrafine β-sialon powder are characterized by XRD, TG-DTA and SEM. The isoelectric point of ultrafine β-sialon is pH 2.46.

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Fabrication and Analysis of β-Sialon Whiskers from Fly Ash by Carbon Thermal Reduction-Nitridation

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.723.610 ◽

2015 ◽

Vol 723 ◽

pp. 610-614

Author(s):

Jing Zhang ◽

Jiang Long Yu ◽

Huan Zhao ◽

Jun Shuai Liu

Keyword(s):

Fly Ash ◽

Reaction Time ◽

Carbon Content ◽

Reaction Temperature ◽

Carbothermal Reduction ◽

Thermal Reduction ◽

Optimal Temperature ◽

Nitridation Process ◽

Best Parameter ◽

Sialon Powder

β-Sialonwhiskers which the molecular structuralformula of β-Sialonis Si3Al3O3N5(z = 3) were synthesized from fly ash and graphite under appropriate technological conditions by carbothermal reduction–nitridation process. The effects of carbon content, reaction temperature and reaction time on synthesis ofβ-Sialonwere analysed by XRD, SEM techniques. The results proved that, the condition of the carbon content over 80% is the best parameter to promote theβ-Sialon powder production. Compared to other kinds of temperature, 1430 °C is the optimal temperature to promoteβ-Sialon powder generation. Compared to 3h, holding time of 6h is promoting theβ-Sialon powder generation.The main morphology of β-Sialon was rod-like whisker.

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