ISSN 2394-5125
 

Research Article 


SINTERING BEHAVIOUR OF FINE REACTIVE MGAl2O4 SPINEL POWDER FORMED BY THE CALCINATION OF MAGNESIUM ALUMINATE HYDRATE POWDER

T. Viswanathan.

Abstract
Magnesium aluminate hydrate precursor was made by co-precipitation and the dried powder was calcined in alumina crucibles at 1000C for 2 hrs. With this calcined powder, different size fractions such as +90 m, -90 m and +63 m, -63 m and +45 m, and -45 m were separated for body making and green compact pellets were prepared in hydraulic press. The green pellets were sintered in the range 1500-1650C with 2 hrs soaking. Densification studies indicate all the fired pellets have reasonable amount of closed pores due to abnormal grain growth which halts further densification to a great extent. Closed pores decrease as size of agglomerates decrease at all firing temperatures and densification gradually improves with reduction of closed pores. Results also reveal the reduction of closed pores as thickness of pellets decreases from ~0.6cm to ~0.4cm. Fired density of 96.84% theoretical (ƍth) has been achieved with 1.55% closed porosity in thin pellets made of -45 m agglomerated spinel powders.

Key words: Magnesium Aluminate Hydrate, Agglomeration, Spinel Crystallites, Sintered Density, Closed Pores, %Theoretical Density.


 
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Pubmed Style

T. Viswanathan. SINTERING BEHAVIOUR OF FINE REACTIVE MGAl2O4 SPINEL POWDER FORMED BY THE CALCINATION OF MAGNESIUM ALUMINATE HYDRATE POWDER. JCR. 2020; 7(7): 802-808. doi:10.31838/jcr.07.07.147


Web Style

T. Viswanathan. SINTERING BEHAVIOUR OF FINE REACTIVE MGAl2O4 SPINEL POWDER FORMED BY THE CALCINATION OF MAGNESIUM ALUMINATE HYDRATE POWDER. http://www.jcreview.com/?mno=108934 [Access: May 30, 2021]. doi:10.31838/jcr.07.07.147


AMA (American Medical Association) Style

T. Viswanathan. SINTERING BEHAVIOUR OF FINE REACTIVE MGAl2O4 SPINEL POWDER FORMED BY THE CALCINATION OF MAGNESIUM ALUMINATE HYDRATE POWDER. JCR. 2020; 7(7): 802-808. doi:10.31838/jcr.07.07.147



Vancouver/ICMJE Style

T. Viswanathan. SINTERING BEHAVIOUR OF FINE REACTIVE MGAl2O4 SPINEL POWDER FORMED BY THE CALCINATION OF MAGNESIUM ALUMINATE HYDRATE POWDER. JCR. (2020), [cited May 30, 2021]; 7(7): 802-808. doi:10.31838/jcr.07.07.147



Harvard Style

T. Viswanathan (2020) SINTERING BEHAVIOUR OF FINE REACTIVE MGAl2O4 SPINEL POWDER FORMED BY THE CALCINATION OF MAGNESIUM ALUMINATE HYDRATE POWDER. JCR, 7 (7), 802-808. doi:10.31838/jcr.07.07.147



Turabian Style

T. Viswanathan. 2020. SINTERING BEHAVIOUR OF FINE REACTIVE MGAl2O4 SPINEL POWDER FORMED BY THE CALCINATION OF MAGNESIUM ALUMINATE HYDRATE POWDER. Journal of Critical Reviews, 7 (7), 802-808. doi:10.31838/jcr.07.07.147



Chicago Style

T. Viswanathan. "SINTERING BEHAVIOUR OF FINE REACTIVE MGAl2O4 SPINEL POWDER FORMED BY THE CALCINATION OF MAGNESIUM ALUMINATE HYDRATE POWDER." Journal of Critical Reviews 7 (2020), 802-808. doi:10.31838/jcr.07.07.147



MLA (The Modern Language Association) Style

T. Viswanathan. "SINTERING BEHAVIOUR OF FINE REACTIVE MGAl2O4 SPINEL POWDER FORMED BY THE CALCINATION OF MAGNESIUM ALUMINATE HYDRATE POWDER." Journal of Critical Reviews 7.7 (2020), 802-808. Print. doi:10.31838/jcr.07.07.147



APA (American Psychological Association) Style

T. Viswanathan (2020) SINTERING BEHAVIOUR OF FINE REACTIVE MGAl2O4 SPINEL POWDER FORMED BY THE CALCINATION OF MAGNESIUM ALUMINATE HYDRATE POWDER. Journal of Critical Reviews, 7 (7), 802-808. doi:10.31838/jcr.07.07.147