Synthesis of a Nanocrystalline α-Al2O3 Powder in Molten Halides in the Temperature Range 700–800°С

2020 ◽  
Vol 2020 (2) ◽  
pp. 138-141 ◽  
Author(s):  
L. A. Elshina ◽  
V. A. Elshina
Keyword(s):  
Al2o3 Powder ◽  
Temperature Range ◽  
Α Al2o3

Low temperature synthesis of ultrafine α-Al2O3 powder by a simple aqueous sol–gel process

2006 ◽  
Vol 32 (5) ◽  
pp. 587-591 ◽  
Author(s):  
Jiang Li ◽  
Yubai Pan ◽  
Changshu Xiang ◽  
Qiming Ge ◽  
Jingkun Guo
Keyword(s):  
Low Temperature ◽  
Sol Gel ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
Al2o3 Powder ◽  
Sol Gel Process ◽  
Α Al2o3

scholarly journals Preparation of ultrafine α-Al2O3 powder from fly ash by ammonium sulfate roasting technology

2019 ◽  
Vol 1347 ◽  
pp. 012111
Author(s):  
Wu Yan ◽  
Xin Haixia ◽  
Xu Yujun ◽  
Liu Jianan
Keyword(s):  
Fly Ash ◽  
Ammonium Sulfate ◽  
Al2o3 Powder ◽  
Α Al2o3

Research on Molding for Al2O3Ceramic Substrate and its Processing Technic

2010 ◽  
Vol 154-155 ◽  
pp. 1397-1400
Author(s):  
Zhan Xin Zhang ◽  
Hong Kui Hu ◽  
Feng Ming Wang ◽  
Tao Liu
Keyword(s):  
Ph Value ◽  
Glass Mold ◽  
Ceramic Substrate ◽  
Al2o3 Powder ◽  
Al2o3 Ceramic ◽  
Α Al2o3

By adopting technique for forming colloid to manufacture Al2O3 Ceramic Substrate, the effect of aggregation reaction which is caused by pH value, temperature for shaping, evocating agent and some other factors of slurry has been researched in the processes for shaping Substrate. The result addresses that the substrate with well-proportioned in density, contractibility and over 78MPa intensity is able to be made while the pH is about 9, the temperature is between 60 and 70°, the shaping duration is no more than 30 minutes, in glass mold, and with 120 item undersize α-Al2O3 powder. To dunk the desiccating substrate for 20 minutes, it would gain the good flexibility, moreover, it is able to be cut. After it is desiccated again, it becomes firm again, this kind of characteristic can be repeated numbers of times.

Effect of citrate to nitrate ratio on the sol-gel synthesis of nanosized α-Al2O3 powder

2017 ◽  
Vol 43 (17) ◽  
pp. 15221-15226 ◽  
Author(s):  
Pallavi Suhasinee Behera ◽  
Sunipa Bhattacharyya ◽  
Ritwik Sarkar
Keyword(s):  
Sol Gel ◽  
Al2o3 Powder ◽  
Α Al2o3 ◽  
Sol Gel Synthesis

Fabrication of High-Density Nanostructured Alumina by the Combined Processes of Magnetic Pulsed Compaction (MPC) and Spark Plasma Sintering (SPS)

2006 ◽  
Vol 118 ◽  
pp. 597-602 ◽  
Author(s):  
Jong Keuk Lee ◽  
Soon Jik Hong ◽  
Min Ku Lee ◽  
Chang Kyu Rhee
Keyword(s):  
Grain Size ◽  
Spark Plasma Sintering ◽  
Combined Processes ◽  
Al2o3 Powder ◽  
Combined Application ◽  
A Value ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Α Al2o3 ◽  
Compaction Method

In this study the nanostructured α-Al2O3 ceramics has been fabricated by the combined application of magnetic pulsed compaction (MPC) and spark plasma sintering (SPS), and their density and hardness properties were investigated. The α-Al2O3 prepared by the combined processes showed an increase of 8.4 % in density, approaching a value close to the theoretical density, a enhancement by 210∼400 Hv in hardness, compared to those for the ones by the MPC or static compaction method followed by a sintering treatment. Its grain size was almost equivalent to or slightly higher than the size of the starting Al2O3 powder, suggesting that the grain growth was remarkably reduced during the MPC and SPS processes.

scholarly journals Apparent activation energy for densification of α-Al2O3 powder at constant heating-rate sintering

2008 ◽  
Vol 31 (6) ◽  
pp. 903-906 ◽  
Author(s):  
W. Q. Shao ◽  
S. O. Chen ◽  
D. Li ◽  
H. S. Cao ◽  
Y. C. Zhang ◽  
...  
Keyword(s):  
Activation Energy ◽  
Apparent Activation Energy ◽  
Heating Rate ◽  
Constant Heating Rate ◽  
Al2o3 Powder ◽  
Α Al2o3 ◽  
Constant Heating

Synthesis of Nanocrystalline α-Al2O3 Powder Using Acetylacetone

2009 ◽  
Vol 24 (5) ◽  
pp. 541-545 ◽  
Author(s):  
J. Chandradass ◽  
Ki Hyeon Kim
Keyword(s):  
Al2o3 Powder ◽  
Α Al2o3

Preparation of a nano-sized α-Al2O3 powder from a supersaturated sodium aluminate solution

2009 ◽  
Vol 35 (2) ◽  
pp. 901-904 ◽  
Author(s):  
Hui Li ◽  
Hongxia Lu ◽  
Song Wang ◽  
Janfeng Jia ◽  
Hongwei Sun ◽  
...  
Keyword(s):  
Sodium Aluminate ◽  
Aluminate Solution ◽  
Al2o3 Powder ◽  
Sodium Aluminate Solution ◽  
Α Al2o3

Preparation of highly dispersive solid microspherical α-Al2O3 powder with a hydrophobic surface for stereolithography-based 3D printing technology

2020 ◽  
Vol 46 (2) ◽  
pp. 1895-1906 ◽  
Author(s):  
Xiaohong Xu ◽  
Shixiang Zhou ◽  
Jianfeng Wu ◽  
Qiankun Zhang ◽  
Yaxiang Zhang ◽  
...  
Keyword(s):  
3D Printing ◽  
Hydrophobic Surface ◽  
Printing Technology ◽  
Al2o3 Powder ◽  
3D Printing Technology ◽  
Α Al2o3
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