Microwave fast sintering of submicrometer alumina

Materials Research

Romualdo Rodrigues Menezes²  Pollyane Marcia Souto¹  Ruth Herta Goldschmidt Aliaga Kiminami¹ 

[1] ,Federal University of Paraíba Department of Materials Engineering João Pessoa PB ,Brazil

关键词: microwave processing;    alumina;    sintering;   

DOI  :  10.1590/S1516-14392010000300011

来源: SciELO

【 摘 要 】

Commercially available alumina powder with high-purity submicrometer particle size and narrow particle size distribution was fully densified by a microwave hybrid fast firing technique. The alumina compacts were surrounded by susceptor material, which helped the heating of the samples, and sintered in a microwave oven at a frequency of 2.45 GHz and a power level of 1.8 kW. The sintered samples reached densities of 99% in sintering cycles of 30 to 40 minutes, a much shorter time than conventional sintering processes. The sintered samples showed uniform microstructures with powder particle size/average grain size rations higher than 1:2.

【 授权许可】

CC BY   
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