Page 345 - Book Hosokawa Nanoparticle Technology Handbook

FUNDAMENTALS CH. 6 EVALUATION METHODS FOR PROPERTIES OF NANOSTRUCTURED BODY

Core particle Nanoparticle A Nanoparticle B

Composing Composing

Nanoparticle coating Core shell dispersion

Dense body Porous body

Dense coating

High disipersion
Body fabricated of nanograins
from nanograins

Multi coating
Network of
Nanograin nanograins
dispersed body

Figure 6.1.1
Nanostructures fabricated from several types of nanoparticles.

dispersed can be cited as representative examples. etc. The functions of all these materials are strongly
The dense-structure fabricated from nanoparticles affected by the microstructures being limited in both
can be obtained by low-temperature sintering and bulk and porous parts.
has very microscopic tissues because of the good
sinterability of nanoparticles. Such microscopic tis-
sues are expected to serve to enhance the perform- 6.1.2 Examples showing how the functions
ances of electronic parts as electric characteristics of nanostructures are performed
are said to be dependent on the sizes of constituent
particles. It is also reported that the dense bulk The detailed functions of nanostructures will be
forms, in which nanoparticles are dispersed, con- described by function later. In this section, an elec-
tribute to improving the strength of structural mate- trode of a solid oxide fuel cell (SOFC), the structure of
rials and others [1]. which is controlled using surface-coating type com-
Typical examples for nanoporous structures are posite particles and the inner-dispersion type compos-
the high dispersion of nanoparticles and the net- ite particles, as shown in the composite fabrication of
works they construct. Nanoporous materials have nanoparticles in Fig. 6.1.1, is taken as an example to
applications for many uses such as electrodes, explain the relation between nanostructures and their
filters, separation membranes, thermal insulations, functional performance.

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