Multilayer High-alumina Ceramic Materials for Disperse Systems Microfiltration with Active Layer Received in Al2O3-CuO, Al2O3-TiO2-MnO2 Systems

Optimizing the properties of electrical-insulating high-alumina ceramic materials

Glass and Ceramics ◽

10.1007/bf00704077 ◽

1985 ◽

Vol 42 (8) ◽

pp. 379-382

Author(s):

E. Ya. Medvedovskii ◽

F. Ya. Kharitonov

Keyword(s):

Ceramic Materials ◽

Alumina Ceramic ◽

High Alumina

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Effect of Dopants on High Alumina Ceramic Materials

Transactions of the Indian Ceramic Society ◽

10.1080/0371750x.1986.10822779 ◽

1986 ◽

Vol 45 (2) ◽

pp. 37-40

Author(s):

L. K. Sharma ◽

G. N. Agrawal ◽

V. C. Joshi

Keyword(s):

Ceramic Materials ◽

Alumina Ceramic ◽

High Alumina

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Preparation of Macroporous Ceramic Materials by Using Aluminium Powder as Foaming Agent

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.699.336 ◽

2014 ◽

Vol 699 ◽

pp. 336-341 ◽

Cited By ~ 1

Author(s):

Nurulfazielah Nasir ◽

Ridhwan Jumaidin ◽

Hady Efendy ◽

Mohd Zulkefli Selamat ◽

Goh Keat Beng ◽

...

Keyword(s):

Ceramic Material ◽

Reaction Rate ◽

Porous Alumina ◽

Porous Ceramic ◽

Ceramic Materials ◽

Calcium Sulphate ◽

Alumina Ceramic ◽

Deionized Water ◽

Foaming Agent ◽

Aluminium Powder

Aluminium powder was used as foaming agent in the production of macro-porous alumina ceramic. The porous ceramic material was developed by mixing an appropriate composition of cement, aluminium powder (Al), alumina (Al2O3), calcium oxide (CaO), gypsum (calcium sulphate dehydrate, CaSO4.2H2O), silica powder and deionized water. Different compositions of porous ceramic were produced at 2wt.%, 3wt.% and 4wt.% of aluminium powder. Their mechanical properties and macro-porosity structural of the porous ceramic material were analysed and compared. It is determined that the optimal properties of porous ceramic material were found at 3wt.% of aluminium powder and degraded drastically at 4wt.%. This phenomenon is due to the chemical reaction between the aluminium powder and DI water in which they form aluminium oxide that promotes the strength of the material but at the same time, more pores are created at higher reaction rate between these two fundamental materials.

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Devitrification of the Grain Boundary Glassy Phase in a High-Alumina Ceramic Substrate

Journal of the American Ceramic Society ◽

10.1111/j.1151-2916.1994.tb04647.x ◽

1994 ◽

Vol 77 (10) ◽

pp. 2593-2598 ◽

Cited By ~ 7

Author(s):

Cynthia A. Powell-Dogan ◽

Arthur H. Heuer ◽

Henry M. O'Bryan

Keyword(s):

Grain Boundary ◽

Glassy Phase ◽

Alumina Ceramic ◽

Ceramic Substrate ◽

High Alumina

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Functional gradient alumina ceramic materials—Heat treatment of bodies prepared by slip casting method

Journal of the European Ceramic Society ◽

10.1016/j.jeurceramsoc.2006.04.088 ◽

2007 ◽

Vol 27 (2-3) ◽

pp. 1325-1331 ◽

Cited By ~ 12

Author(s):

Jana Andertová ◽

Radek Tláskal ◽

Martin Maryška ◽

Jiří Havrda

Keyword(s):

Heat Treatment ◽

Slip Casting ◽

Ceramic Materials ◽

Alumina Ceramic ◽

Casting Method ◽

Functional Gradient

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Rapid method for chemical analysis of high-alumina ceramic

Glass and Ceramics ◽

10.1007/bf00698926 ◽

1977 ◽

Vol 34 (5) ◽

pp. 334-336 ◽

Cited By ~ 1

Author(s):

R. P. Chigina ◽

V. P. Rudenko

Keyword(s):

Chemical Analysis ◽

Rapid Method ◽

Alumina Ceramic ◽

High Alumina

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Influence of boundary microstructure on the abrasive wear of a high-alumina ceramic

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100170906 ◽

1994 ◽

Vol 52 ◽

pp. 634-635

Author(s):

C. P. Doğan ◽

J. A. Hawk

Keyword(s):

Heat Treatment ◽

Elevated Temperatures ◽

Bulk Material ◽

Ceramic Materials ◽

High Alumina ◽

Polycrystalline Ceramic ◽

Before And After ◽

Subsequent Exposure ◽

History Of ◽

Boundary Microstructure

The glassy melt present at the grain boundaries of many commercially-produced, polycrystalline ceramic materials will often crystallize during cool down from the sintering temperature, or during subsequent exposure to elevated temperatures. The extent of devitrification of the boundary glass, and the types of phases that form, depend upon the composition of the original glass melt and the thermal history of the material. In a 96% Al2O3 ceramic, for example, a boundary glass that is high in CaO will crystallize to anorthite (CaAl2Si2O8), gehlenite (Ca2Al2SiO7), garnet ((Mg,Ca)3Al2Si3O12) and spinel (MgAl2O4) upon exposure to temperatures between 1050° and 1350° C. Devitrification is essentially complete within one hour of exposure to these elevated temperatures. The microstructure of such a material, before and after a 100-hour heat treatment at 1150° C, is illustrated in Figs. 1 and 2, respectively.Although the microstructure of such materials can change dramatically with heat treatment, there is little evidence that this difference results in a change in the room temperature mechanical properties of the bulk material.

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