Ceramics in Nanotech Revolution

Abstract

microtubules were prepared according to previous publication with several modification [11]. Typically, 0.10 g of dl-tartaric acid was dissolved into 4 ml 28 % ammonia, and then 10 ml of ethanol was quickly added to the ethanol solution, the mixture was held for 5 min to grow needle-like ammonium tartrate crystal. The template crystals formed were washed with C 2 H 5 OH. Because these crystals are soluble in water but not in ethanol, 1.0 g ASB was added into a 10 ml absolute ethanol slurry containing these temple crystals, and the mixture was vigorously stirred for at least 2 h at 40 C. After the mixed solution became translucent gel, it was left stand for another 24 h at 40 C under a loosely covered container. Then the mixture was filtered and washed with a large amount of water on a test sieve with 45 lm aperture and dried in an oven at 60 C. Finally the product was calcined at different temperature for 5 h. For comparison, additional Al 2 O 3 materials with different amounts of precursor and conditions were also synthesized by a similar procedure.The samples were characterized by X-ray diffraction with a Rigaku Rint-1400 X-ray diffractometer with Cu Ka radiation (k=0.15418 nm). Scanning electron microscopy (SEM) was carried out on a Hitachi S-510 scanning electron microscope. Nitrogen adsorption data were collected on a Micromeritics ASAP 2000 nitrogen adsorption apparatus.

Nanodimensional and Nanocrystalline Calcium Orthophosphates

“…This has encouraged the invention of chemical, physical and biomimetic methods by which such nano-sized materials can be obtained [134]. Generally, all approaches for preparation of nanodimensional and nanocrystalline materials can be categorized as "bottom-up" and "top-down" ones [142,254]. The bottom-up approach refers to the build up of a material from the bottom, i.e., atom by atom, molecule by molecule or cluster by cluster and then assembles them into the final nanostructured material.…”

Synthesis of Monodispersed Barium Titanate Nanoparticles with Narrow Size Distribution by a Modified Alkoxide‐Hydroxide Sol‐Precipitation Method

“…Therefore, the uniformity of the powders and the grain sizes have to be effectively controlled for the demand of the next‐generation BME–MLCCs. Furthermore, ceramics produced from agglomerate‐free nanosized powders with narrow size distribution have shown unique consolidation and compaction properties 5–11 . Thus, monodispersed barium titanate nanoparticles with narrow size distribution are required for the future application.…”

“…Furthermore, ceramics produced from agglomerate-free nanosized powders with narrow size distribution have shown unique consolidation and compaction properties. [5][6][7][8][9][10][11] Thus, monodispersed barium titanate nanoparticles with narrow size distribution are required for the future application.…”

Room‐Temperature Synthesis of BaTiO3 Nanoparticles in Large Batches

“…For MLCCs, in particular, improved performance can be obtained by decreasing the thickness of the ceramic layer with a decrease of the particle size of BaTiO 3 8 . Moreover, fine ceramic powders can decrease the sintering temperature, achieve fine ceramic of uniform grain size, and save energy 9 . The ceramic with an ultrafine grain size may have some new physical effects and may be useful in developing some potentially useful devices.…”

“…8 Moreover, fine ceramic powders can decrease the sintering temperature, achieve fine ceramic of uniform grain size, and save energy. 9 The ceramic with an ultrafine grain size may have some new physical effects and may be useful in developing some potentially useful devices.…”