TY - JOUR
T1 - Precipitation of heterogeneous nanostructures
T2 - Metal nanoparticles and dielectric nanocrystallites
AU - Masai, Hirokazu
AU - Takahashi, Yoshihiro
AU - Fujiwara, Takumi
AU - Tokuda, Yomei
AU - Yoko, Toshinobu
N1 - Funding Information:
This work was supported by the Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Sport and Culture, Japan, and the Global Center of Excellence (COE) Program in Tohoku University. The authors thank Dr. T. Miyazaki (Tohoku University) for taking the TEM images and Professor Y. Koike (Tohoku University) for performing the XRD measurements.
PY - 2010/7/15
Y1 - 2010/7/15
N2 - Heterogeneous precipitation of nanocrystallites of metallic Bi and anatase was observed in CaO-Bi2O3-B2O3- Al2O3-TiO2 glass-ceramics. Addition of AlN reduced the Bi2O3 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.
AB - Heterogeneous precipitation of nanocrystallites of metallic Bi and anatase was observed in CaO-Bi2O3-B2O3- Al2O3-TiO2 glass-ceramics. Addition of AlN reduced the Bi2O3 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.
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U2 - 10.1063/1.3457790
DO - 10.1063/1.3457790
M3 - Article
AN - SCOPUS:77955837339
SN - 0021-8979
VL - 108
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 2
M1 - 023503
ER -