Low-temperature synthesis of boron carbide powder by structural approaches based on morphological control of precursor structure

研究了由浓缩硼酸-多元醇热分解产物制备的碳化硼前驱体中氧化硼（B2O3）与碳组分在空气中的分散状态。采用B2O3/碳结构的方法，实现了B4C粉末的低温合成（在Ar流中温度1200℃）。由于B4C粉末最常见的工业制造方法（碳热还原）通常在约2000℃的高温下进行，因此预计这种低温合成方法将对工业产生重大影响。

The dispersion state of boron oxide (B2O3) and carbon components in a boron carbide (B4C) precursor prepared from a condensed boric acid-polyol product by the thermal decomposition in air was developed. Low-temperature synthesis of B4C powder with little residual carbon was achieved (1200 oC in an Ar flow) by a structural approach to the B2O3/carbon structure. Since the most common industrial manufacturing method for B4C powder (carbothermal reduction) is usually carried out at a high temperature of approximately 2000 oC, this low-temperature synthesis method is expected to have a major industrial impact.