Nb2O5 B2O3 and Mg powder blends were milled at room temperature by a highenergy ball mill for a different time Subsequently an undesired MgO phase was removed from the milled powders by HCl leaching to constitute NbBNbB2Nb3B4 as final products and they were subjected to an annealing process at 1500 C for 4 h to observe probableMessage Get Price
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