Ceramic powder synthesis alumina

We recently described two discoveries that offer solutions to this problem. First, a new, simple synthesis of polymeric precursors to P"-alumina made directly from NaOH, alumina and triethanolamine, TEA (2). Second, we learned to form a wide variety of ultrafine aluminosilicate ceramic powders by flame spray pyrolysis processing of these polymers. The goal of the current research program is to demonstrate that it is possible to produce reasonable quality P"-alumina shapes using these low cost precursors and powders. 

Ghanizadeh S, Bao X, Vaidhyanathan B, Burner J (2014) Synthesis of nano a-alumina powders using hydrothermal and precipitation routes a comparative study. Ceram Int 40 1311-1319... 

Suchanek WL (2010) Hydrothermal synthesis of a-alumina (a-Al203) powders study of the processing variables and growth mechanisms. J Am Ceram Soc 93 399-412... 

Y. Sheng, B. Cobbledick and P. S. Nicholson, The synthesis of polycrystalline H30 p7p-alumina ceramics from conventional precursor Na/K p"/p-alumina powders. Solid State Ionics 27 (1988) 233—41. 

Adsorbents are practically used in the granular form. The performance of an adsorption process critically depends on the size, shape, pore texture and mechanical strength of the support body used. Sol-gel process has commonly been employed for preparation of ceramic films, fibers and powders. This section reports our work on synthesis and properties of the sol-gel derived alumina granular particles. The principle of the sol-gel derived granulation process should be applicable to preparation of granular particles of other ceramic materials discussed in the preceding section. 

Sasaki T., Watanabe M., Hashizume H., Yamada H., Nakazawa H. Macromolecule-like aspects for a colloidal suspension of an exfoliated titanate. Pairwise association of nanosheete and dynamic reassembling process initiated from it. J. Am. Chem. Soc. 1996 118 8329-8335 Sasaki T., Nakano S., Yamauchi S., Watanabe M. Fabrication of titanium dioxide thin flakes and their porous aggregate. Chem Mater. 1997 9 602-608 Sathiyakumar M., Gnanam F.D. Synthesis of sol-gel derived alumina powder effect of milling and calcination temperatures on sintering behaviour. Brit. Ceram. Trans. 1999 98 87-92... 

A. Peigney, C. Laurent, O. Dumortier, and A. Rousset, "Carbon nanotubes Fe alumina nanocomposites. Part I Influence of the Fe content on the synthesis of powders," Journal of the European Ceramic Society, 18(14] 1995-2004.1998. 

---