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数学
ULTRAFINE Al_2O_3 PARTICLES PRODUCED BY LASER HEATING METHOD
<正> Materials composed of ultrafine particles in the range of 1—50 nm with dean surfaces or uniform cover layers are called nanocrystalline materials. Their properties are much superior to coarse-grained materials with the same composition, and new structures may be formed. For example, the properties of nanocrystalline TiO_2 are much higher than coarse-
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Chinese Science Bulletin
1990年21期

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