Ceramic powder synthesis particle shape

Another area in which preceramic polymers can be utilized effectively is as binders for ceramic powders in near net shaping fabrication processes, such as compression or injection molding with subsequent sintering. Alternatively, an active filler and a polymer [67,68], as reported by Greil and Seibold, can be used in such fabrication. Other potential applications of preceramic polymers is in the general area of coatings, especially for carbon-carbon composites [69], and in the synthesis of nanostructured ceramic particles and composites [70-73]. 

In summary, an ideal ceramic starting powder should a small size, e.g., <1 pm or at the scale of run, a narrow particle or grain size distrihution, i.e., monodisperse or near monodisperse, a spherical or near-spheiical particle/grain shape, no agglomeration or only soft agglomeration, completed chemical reaction, single phase and high purity. To achieve this, it is important to select the synthesis methods. 

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. 

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