Low-temperature synthesis of boron carbide powder from condensed boric acid-glycerin product

作者：Kakiage Masaki^*; Tahara Naoki; Yanase Ikuo; Kobayashi Hidehiko

来源：Materials Letters, 2011, 65(12): 1839-1841.

DOI：10.1016/j.matlet.2011.03.046

• Boron carbide (B(4)C)
• Glycerin
• Boric acid
• Precursor
• Low-temperature synthesis

Crystalline boron carbide (B(4)C) powder was synthesized by the carbothermal reduction of a condensed product formed from boric acid (H(3)BO(3)) and glycerin (C(3)H(8)O(3)). The condensed product was prepared by dehydration after directly mixing equimolar amounts of H(3)BO(3) and glycerin, which was followed by pyrolysis in air to obtain a precursor powder from which the excess carbon had been eliminated. The prepared precursor powder had a bicontinuous boron oxide (B(2)O(3))/carbon network structure. Crystalline B(4)C powder without residual carbon was successfully synthesized from this precursor powder by heating at 1250 degrees C for 5 h in an Ar flow.

• 出版日期2011-6-30