Abstract
Tungsten nanopowders were synthesized by a chemical metallurgy method at 440–640 °C from WO3 precursors possessing different specific surfaces. The α-W nanopowder synthesized at 640 °C was not pyrophoric, while the α-W containing the traces of oxides obtained at 480 °C was pyrophoric. The temperature interval for the α-W synthesis was revealed as very narrow, from 470 to 490 °C.
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