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HEBMHigh-Energy Ball Milling
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The WPTFE fibers were firstly mechanically cut into about 0.2 mm in length, and subjected to high-energy ball milling process at -10[degrees]C in a laboratory type vertical stirring mill (Qingdao precision machinery, 01-HDDM) with a stirring speed of 2500 r/min.
lb), then the sample was subjected to high-energy ball milling process at -10[degrees]C in a laboratory type vertical stirring mill and fully ground to fine powder (Fig.
To have a further investigation on the effect of high-energy ball milling on r-PTFE, POM pictures of r-PTFE for different milling times were shown in Fig.
It is evident that high-energy ball milling on r-PTFE could enhance compatibility and dispersion of r-PTFE in the NBR matrix.
NBR/r-PTFE composites with r-PTFE for 7 h milling show similar tensile behavior and a 21.9% increase in modulus at 300% in comparision with NBR, which can be attributed to a better compatibility and dispersion caused by high-energy ball milling.
From these results, it can be proposed that, with these two low rotational speeds, the generated milling energy was thermodynamically insufficient for high-energy ball milling reaction between [Nb.sub.2][O.sub.5] and alkali carbonates, similar to those of previous works on the synthesis of KNb[O.sub.3] and ([K.sub.0.5][Na.sub.0.5])Nb[O.sub.3] [16,18].
The effects of the ball-to-powder mass ratio and milling speed on the synthesis of ([K.sub.0.5][Na.sub.0.5])Nb[O.sub.3] nanopowders by reactive high-energy ball milling method using [Na.sub.2]C[O.sub.3], [K.sub.2]C[O.sub.3], and [Nb.sub.2][O.sub.5] as starting materials were systematically investigated.
Sopicka-Lizer, Ed., High-Energy Ball Milling, Woodhead Publishing, Oxford, UK, 2010.
This indicates that the energy provided from the high-energy ball milling with subsequent sintering was enough to produce a desired single spinel phase.
The synthesized [Bi.sub.0.5][Sb.sub.1.5][Te.sub.3] powders were mixed with [Al.sub.2][O.sub.3] nanoparticles by a high-energy ball milling process (Planetary Milling Machine, Fritsch) in a hexane solvent.
In summary, p-type BST nanopowders prepared from MCP were mixed with 0.3, 0.5, and 1.0 vol.% [Al.sub.2][O.sub.3] nanoparticles by a high-energy ball milling process.
Guo, "Nanostructured CuO-[alpha]-[Fe.sub.2][O.sub.3] solid solution obtained by high-energy ball milling," Materials Science and Engineering A, vol.
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