Precipitation of heterogeneous nanostructures: Metal nanoparticles and dielectric nanocrystallites

Journal Article · Thu Jul 15 00:00:00 EDT 2010 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3457790· OSTI ID:21476348

Masai, Hirokazu; Takahashi, Yoshihiro; Fujiwara, Takumi ^[1]; Tokuda, Yomei; Yoko, Toshinobu ^[2]

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1. Department of Applied Physics, Tohoku University, 6-6-05, Aoba, Aoba-ku, Sendai 980-8579 (Japan)
2. Institute for Chemical Research, Kyoto University, Gokasyo, Uji, Kyoto 611-0011 (Japan)

Heterogeneous precipitation of nanocrystallites of metallic Bi and anatase was observed in CaO-Bi{sub 2}O{sub 3}-B{sub 2}O{sub 3}-Al{sub 2}O{sub 3}-TiO{sub 2} glass-ceramics. Addition of AlN reduced the Bi{sub 2}O{sub 3} to Bi metal nanoparticles, which were uniformly dispersed in the glass. After heat-treatment of the Bi-precipitated glass around the glass transition temperature, nanocrystalline anatase precipitated out without aggregation of the Bi metal particles. It was found that the anatase nanocrystal size was affected by the distance between a nanocrystal and a precipitated Bi nanoparticle. The glass-ceramic produced is a functional material containing a random dispersion of different types of nanoparticles with different dielectric constants.

• OSTI ID: 21476348
• Journal Information: Journal of Applied Physics, Vol. 108, Issue 2; Other Information: DOI: 10.1063/1.3457790; (c) 2010 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
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AGGLOMERATION
ALUMINIUM NITRIDES
ALUMINIUM OXIDES
BISMUTH
BISMUTH OXIDES
BORON OXIDES
CALCIUM OXIDES
CERAMICS
CRYSTALS
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ELEMENTS
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NITRIDES
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
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