Mugurel ENACHI, Cristian ENI, Marius BODOR, Iulia GRAUR, Claudia UNGUREANU,Livia PATRASCU, Adrian CIRCIUMARU<br>Nano-sized Ceramic Powders with n-type Semiconducting Properties<br>Obtaining and analysis

Mugurel ENACHI, Cristian ENI, Marius BODOR, Iulia GRAUR, Claudia UNGUREANU,Livia PATRASCU, Adrian CIRCIUMARU
Nano-sized Ceramic Powders with n-type Semiconducting Properties
Obtaining and analysis

Abstract:

Ceramic matrix composites represent a class of high valuable materials especially for high tech applications but also, in their powder form the ceramics are more often used as agents to change the properties of polymer matrix. As it is well known, the quality of a composite resides in the nature and quality of the interphase matrix-immersed phase or matrix-immersed phases. In the case of nano-sized agents, the most important aspect is related to the high value of specific area which determines the transport phenomena and the loading transfer between matrix and modifying agents. On the other hand, the small dimensions of particles are very important regarding the mechanical response of material. If the fact that each particle acts as a structural defect, the larger dimension of the particles implies larger damage on the mechanical properties, despite the particles effects on other important properties - electric, thermal or chemical properties. As complex oxides are showing special properties - for instance they are semiconductors - their use in polymer matrix should be focused on obtaining energy producing or energy storage materials which should be cheaper than the traditional ones. The present study is about obtaining and characterizing nano-sized ceramic powders for further use as modifying agents into polymers. The method used is the citrated-gels method but tests were also performed using oxalic acid instead of citric acid, being known that both acids can lead to gel mixtures. The obtained results - especially regarding the particles dimensions - are encouraging the development of studies with other precursors for further designed applications with epoxy resins. Keywords: nano-sized ceramics, SEM analysis, Raman analysis

Issue: 2016, Volume 67, Issue 6

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