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

2012 ◽  
Vol 95 (6) ◽  
pp. 1871-1877 ◽  
Author(s):  
Juntong Huang ◽  
Heping Zhou ◽  
Zhaohui Huang ◽  
Guanghua Liu ◽  
Minghao Fang ◽  
...  
Keyword(s):  
Formation Mechanism ◽  
Carbothermal Reduction ◽  
Sialon Powder

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

2007 ◽  
Vol 336-338 ◽  
pp. 927-929 ◽  
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.

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

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.

Nano β-SiAlON Powder Synthesized by Carbothermal Reduction and Nitridation of Ultrafine Al2O3-SiO2 Mixture Employing Sol-Gel Techniques

2003 ◽  
Vol 237 ◽  
pp. 117-122 ◽  
Author(s):  
Q. Li ◽  
C. Zhang ◽  
Katsutoshi Komeya ◽  
Junichi Tatami ◽  
Takeshi Meguro ◽  
...  
Keyword(s):  
Carbothermal Reduction ◽  
Sol Gel ◽  
Sialon Powder

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

1994 ◽  
Vol 41 (2) ◽  
pp. 188-192
Author(s):  
Chitake Yamagishi ◽  
Keizou Tsukamoto ◽  
Tatsuya Shiogai ◽  
Mutsuo Hayashi ◽  
Takayoshi Iseki
Keyword(s):  
Carbothermal Reduction ◽  
Reaction Process ◽  
Sialon Powder

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

2007 ◽  
pp. 927-929
Author(s):  
Hai Jun Zhang ◽  
H.T. Zhang ◽  
J.Q. Miao ◽  
Z.L. Wang ◽  
Quan Li Jia ◽  
...  
Keyword(s):  
Carbothermal Reduction ◽  
Sol Gel ◽  
Sialon Powder
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