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

研究了由缩合硼酸-多元醇产物在空气中热分解制备的碳化硼（B4 C）前驱体中氧化硼（B2 O3）和碳组分的分散状态。通过对B_2O_3/C结构的结构化处理，实现了具有少量残余碳的B_4C粉末的低温合成（1200 ℃，在Ar流中）。由于B4 C粉末最常见的工业制造方法（碳热还原）通常在约2000 oC的高温下进行，因此这种低温合成方法预计将产生重大的工业影响。

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.