Highly Dense, Transparent-Al2O3 Ceramics From Ultrafine Nanoparticles Via a Standard SPS Sintering

Roussel N; Lallemant L; Chane-Ching JY; Guillemet-Fristch S; Durand B; Garnier V; Bonnefont G; Fantozzi G; Bonneau L; Trombert S; Garcia-Gutierrez D

Journal of the American Ceramic Society, Vol.96, No.4, 1039-1042, 2013

Roussel N, Lallemant L, Chane-Ching JY, Guillemet-Fristch S, Durand B, Garnier V, Bonnefont G, Fantozzi G, Bonneau L, Trombert S, Garcia-Gutierrez D

Using discrete, ultrafine alumina, highly dense transparent (71% real in-line transmission, RIT, =640nm) ceramics were achieved with grain size as small as 260nm using standard SPS sintering. We show that use of La3+ as a dopant greatly reduces sensitivity to the sintering temperatures. Transparent alumina were achieved in a large range of sintering temperatures, 1140 degrees C