High-strength macro-porous alumina ceramics with regularly arranged pores produced by gel-casting and sacrificial template methods

2019 ◽  
Vol 54 (14) ◽  
pp. 10119-10129 ◽  
Author(s):  
Mengwen Zhang ◽  
Xiaodong Li ◽  
Mu Zhang ◽  
Zhimeng Xiu ◽  
Ji-Guang Li ◽  
...  
Keyword(s):  
Porous Alumina ◽  
High Strength ◽  
Alumina Ceramics ◽  
Sacrificial Template ◽  
Gel Casting ◽  
Template Methods

Fabrication of Porous Alumina Ceramics by Spark Plasma Sintering Method

2007 ◽  
Vol 26-28 ◽  
pp. 279-282
Author(s):  
Dae Ho Choi ◽  
Kai Kamada ◽  
Naoya Enomoto ◽  
Junichi Hojo ◽  
Soo Wohn Lee
Keyword(s):  
Carbon Black ◽  
Porous Alumina ◽  
High Strength ◽  
Alumina Ceramics ◽  
Carbon Black Content ◽  
Pore Characteristics ◽  
Carbon Black Powder ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Sintering Method

In this work, porous alumina ceramics were obtained by controlled sintering of alumina-carbon black powder mixtures. In order to develop the porous alumina ceramics with high strength, as the amount of carbon black increased, the number of small pores increased because the pore characteristics and relative density the influence of SPS condition and carbon black content on was studied.

scholarly journals High-strength porous alumina ceramics prepared from stable wet foams

2021 ◽  
Author(s):  
Linying Wang ◽  
Liqiong An ◽  
Jin Zhao ◽  
Shunzo Shimai ◽  
Xiaojian Mao ◽  
...  
Keyword(s):  
Heat Insulation ◽  
Porous Alumina ◽  
High Strength ◽  
Porous Ceramics ◽  
High Porosity ◽  
Alumina Ceramics ◽  
Direct Foaming ◽  
Catalyst Carrier ◽  
Average Grain Size ◽  
Direct Foaming Method

AbstractPorous ceramics have been widely used in heat insulation, filtration, and as a catalyst carrier. Ceramics with high porosity and high strength are desired; however, this high porosity commonly results in low strength materials. In this study, porous alumina with high porosity and high strength was prepared by a popular direct foaming method based on particle-stabilized wet foam that used ammonium polyacrylate (PAA) and dodecyl trimethyl ammonium chloride (DTAC) as the dispersant and hydrophobic modifier, respectively. The effects of the dispersant and surfactant contents on the rheological properties of alumina slurries, stability of wet foams, and microstructure and mechanical properties of sintered ceramics were investigated. The microstructure of porous ceramics was regulated using wet foams to achieve high strength. For a given PAA content, the wet foams exhibited increasing stability with increasing DTAC content. The most stable wet foam was successfully obtained with 0.40 wt% PAA and 0.02 wt% DTAC. The corresponding porous alumina ceramics had a porosity of 82%, an average grain size of 0.7 µm, and a compressive strength of 39 MPa. However, for a given DTAC content, the wet foams had decreasing stability with increasing PAA content. A possible mechanism to explain these results is analyzed.

scholarly journals Evaluation of mechanical properties of porous alumina ceramics obtained using rice husk as a porogenic agent

Cerâmica ◽  
2019 ◽  
Vol 65 (suppl 1) ◽  
pp. 70-74 ◽  
Author(s):  
G. C. Ribeiro ◽  
B. A. Fortes ◽  
L. da Silva ◽  
J. A. Castro ◽  
S. Ribeiro
Keyword(s):  
Mechanical Properties ◽  
Rice Husk ◽  
Porous Alumina ◽  
Alumina Ceramics
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