MW-Processed Transparent Ceramics

The use of MW sintering to fabricate transparent ceramics is relatively less popular currently. Transparent ceramics that have been processed by using MW sintering include AI2O3 [150-152], YAG [153], AlON [154], and mullite [155]. MW sintering has been shown to be an effective technique to produce transparent ceramics as compared with the conventional sintering technologies. 

30 0 j,m, as shown at the top panel in Fig. 7.40, whereas the center part of the post-sintered sample was converted into single ciystal without the presence of grain boundaries, i.e., the bottom panel of the figure. The converted sample exhibited an enhanced transmittance by about 20 % as compared with the as-sintered ones, showing the feasibility and advantage of MW sintering technique. 

7 Sintering and Densilication of Transparent Ceramics Infrared pyrometer 

X Conventional Sintering to IS0O°C with hold Microwave Sintering to I200 C with ) old 

520 14 kJ moF for the conventional sintering, meaning that the there was a difference in densificaiion mechanism between the two sintering techniques, which deserves for further investigation. 

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