Evaluation of Thermo Mechanical Properties of Zircon-Alumina-Magnesia Composite in the Field of Refractory Application

Evaluation of Thermo Mechanical Properties of Zircon-Alumina-Magnesia Composite in the Field of Refractory Application

Raveendra K S1, Yogishkumar S V2, Manjunatha B S3, Dr. Sharanraj V*4, Mahadevswamy K5

1 Lecturer, Dept of  Ceramics Technology, S.J. (Govt.) Polytechnic, Bangalore-01.

2 Senior Grade Lecturer, Dept of Mechanical Engg. (Machine Tools), S.J. (Govt.) Polytechnic, Bangalore-01.

3 Senior Grade Lecturer, Dept of Mechanical Engg. (W&SM), S.J. (Govt.) Polytechnic, Bangalore-01.

*4 Senior Grade Lecturer, Dept of Mechanical Engg. (W&SM), S.J. (Govt.) Polytechnic, Bangalore-01.

5 Senior Grade Lecturer, Dept of Mechanical Engg. (TPH), S.J. (Govt.) Polytechnic, Bangalore-01.

ABSTRACT

      This project is based on the evaluation of thermo mechanical properties of Zircon-Alumina-Magnesia composite in the field of refractory application. Hard, dense and volume stable Zircon-Alumina-Magnesia refractory bodies were prepared from appropriate mixture of graded Alumina, Zircon and Magnesia powder and fired at 15400C.Magnesia content pf fired bodies should be in such amount that is enough to combine with all the silica from dissociated zircon to form forsterite, and the zircon in the monoclinic form. Zirconia material is incorporated as the reinforcing phase to improve mechanical properties of alumina along with the superior thermo-mechanical properties (e.g. RUL, TSR and HMOR). The addition of MgO increases the amount dissociation of zircon and same time association of SiO2 which reacts with either MgO or alumina forms forsterite and mullite. The formation of zirconia and Mg2SiO4 phase improved the thermal shock as well as HMOR.