<I>In Situ</I> Ultrasonic Study of High-Alumina Castables

In order to improve the hot strength of pre-cast shapes of high alumina castables used in industrial furnaces, the present work explored the approach to using in-situ formed mullite by incorporating 3%-9% silicon powders in bauxite based ULC castables. The pre-cast specimens were dried and then heated at 1450°C for 3h in air. The in-situ formed mullite derived from Si can remarkably improve HMOR of the castables. Refractoriness under load and TSR can also be improved by Si incorporation. The microstructure of the related castable samples was interpreted. The optimizing addition of Si power in this work is about 5%.

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Sound velocities measurement on MgSiO3 akimotoite at high pressures and high temperatures with simultaneous in situ X-ray diffraction and ultrasonic study

Physics of The Earth and Planetary Interiors ◽

10.1016/j.pepi.2013.06.005 ◽

2014 ◽

Vol 228 ◽

pp. 97-105 ◽

Cited By ~ 10

Author(s):

Chunyin Zhou ◽

Steeve Gréaux ◽

Norimasa Nishiyama ◽

Tetsuo Irifune ◽

Yuji Higo

Keyword(s):

High Temperatures ◽

High Pressures ◽

X Ray Diffraction ◽

X Ray ◽

Ultrasonic Study ◽

Sound Velocities

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The main role of silica—Based cement free binders on the microstructural evolution and mechanical behaviour of high alumina castables

Journal of the European Ceramic Society ◽

10.1016/j.jeurceramsoc.2018.04.048 ◽

2018 ◽

Vol 38 (11) ◽

pp. 4137-4148 ◽

Cited By ~ 5

Author(s):

Olga Burgos-Montes ◽

Margarita Álvarez ◽

Antonio H. de Aza ◽

Pilar Pena ◽

Carmen Baudín

Keyword(s):

Microstructural Evolution ◽

Mechanical Behaviour ◽

High Alumina ◽

Main Role ◽

Alumina Castables

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In Situ Coagulation of High-Alumina Zero-Cement Refractory Castables

Journal of the American Ceramic Society ◽

10.1111/j.1151-2916.2002.tb00386.x ◽

2002 ◽

Vol 85 (8) ◽

pp. 1947-1953 ◽

Cited By ~ 19

Author(s):

André R. Studart ◽

Victor C. Pandolfelli ◽

Elena Tervoort ◽

Ludwig J. Gauckler

Keyword(s):

High Alumina ◽

Refractory Castables

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The impact of pre-formed and in situ spinel formation on the physical properties of cement-bonded high alumina refractory castables

Ceramics International ◽

10.1016/j.ceramint.2010.04.005 ◽

2010 ◽

Vol 36 (7) ◽

pp. 2079-2085 ◽

Cited By ~ 20

Author(s):

E.Y. Sako ◽

M.A.L. Braulio ◽

P.O. Brant ◽

V.C. Pandolfelli

Keyword(s):

Physical Properties ◽

High Alumina ◽

Spinel Formation ◽

Refractory Castables ◽

Alumina Refractory ◽

The Impact

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Effect of Antioxidants and Atmosphere on the Phase Formation and Microstructure of In Situ MgO-Al2O3 Spinels

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.273-276.542 ◽

2008 ◽

Vol 273-276 ◽

pp. 542-548 ◽

Cited By ~ 1

Author(s):

Rahim Naghizadeh ◽

Hamid Reza Rezaie ◽

F. Golestani Fard

Keyword(s):

Silicon Carbide ◽

Phase Formation ◽

High Alumina

The formation of in-situ spinel in Al2O3-MgO-C refractories along with different antioxidants occurs at different atmospheres in surface and inner of refractories. Then the types and microstructures of established phases have become increasingly important in these refractories. In the present work, reactions on firing Al2O3-MgO samples with added graphite, Al, Si and SiC in air or coke bed atmosphere at 1300°C and 1600°C have been studied. The results showed that with the addition of graphite and Al especially at 1600°C in coke bed, high alumina-rich spinel (Mg0.866Al1.83O3.611) was increased and in the microstructure were appeared high amount porosity. In silicon and silicon carbide additive samples after firing at 1600°C in coke bed, sapphirine phase were revealed.

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