Figure 3From: Wet-chemistry processing of powdery raw material for high-tech ceramicsTEM images of Al 0.25 Si 0.75 O 2+δ . TEM images of Al0.25Si0.75O2+δ synthesized using the following structure-directing agents: ammonium hydroxide (a), HMTA (b), and ammonium chloride (c).Back to article page