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Nanoceramics: strategy and applications1 Abdul-Majeed Azad, PhD
 

Summary: Nanoceramics: strategy and applications1
Abdul-Majeed Azad, PhD
Chemical Engineering Department
The University of Toledo, Toledo, OH, USA.
Abstract:
There is convincing theoretical and experimental evidence to suggest that fundamentally
new behavior in nanostructured materials is witnessed that otherwise cannot be
predicted by simple scaling laws. Nanodimensions provide a clear advantage over the
bulk, where the reduced dimensionality not only accentuates the functionality it also
does so in many instances, under less than theoretically required conditions. Hence,
there is a window of opportunity to develop nanoarchitectured ceramics for achieving
high performance devices.
High selectivity, enhanced sensitivity, short response time and long shelf-life are some
of the key features sought in the solid-state ceramic-based chemical sensors. Since the
sensing mechanism and catalytic activity are predominantly surface-dominated, benign
surface features in terms of small grain size, large surface area and high aspect ratio
and, open and connected porosity, are required to realize a successful material. In order
to incorporate these morphological features, a technique based on rigorous
thermodynamic consideration of the metal/metal oxide coexistence, was devised. By
modulating the oxygen partial pressure across the equilibrium M/MO proximity line,

  

Source: Azad, Abdul-Majeed - Department of Chemical and Environmental Engineering, University of Toledo

 

Collections: Materials Science; Energy Storage, Conversion and Utilization