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Along with carbon and nitrogen, boron is one of the few elements in the periodic table known to form stable compounds featuring triple bonds. boron has an energy band gap of 1.50 to 1.56 ev, which is higher than that of either silicon or germanium. boron is found in borates, borax, boric acid, colemanite, kernite,...
All three of these old ceramic armor materials have their shortcomings: alumina is far too heavy, to such an extent that even steel armor is now giving it a run for its money; silicon carbide is, although much lighter, still heavy enough to be burdensome; the best grades of boron carbide, although nearly 40% lighter than alumina and more than 20% lighter than silicon carbide, are
Boron carbide hardness of 4950kgf/mm2.it is high hardness and strength, low density, corrosion resistant, high temperature resistant, low thermal con contact now sell high pure
In addition to everything mentioned above, boron carbide b 4 c stands out among the known superhard materials for its low density (2.52 g/cm 3) that makes this material one of the most promising for sintering the ceramics on its basis, especially when produce the armor plates and fuel rod cells

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