根据吉布斯能最小原理,利用FactSage计算了B/O体系和B/C/ H/O体系的热平衡,研究了温度、压强和物质摩尔比对平衡的影响.计算结果表明,B/O体系下,当B/O摩尔比为2:3时,随温度逐渐升高,主要的气相含硼燃烧产物由B2O3(g)转变为BO(g)和BO2(g);提高环境压强,有助于增大硼燃烧的热量释放；当温度为2400K恒定的情况下,贫燃料时的主要产物为B2O3(g)和BO2 (g),富燃料时的主要产物为B2O3(g)、BO(g)和B2O2(g).在B/C/H/O体系中,把B/C/H/O摩尔比定为2:1:2:6,在温度相对较低时,B/C/H/O体系燃烧的主要产物为HBO2 (g)、CO2 (g)、H2O(g)和B2O3 (g),此时燃料的热释放比较完全.随温度升高,之前的燃烧产物被CO(g)、BO(g)等低热释放的物质代替,说明外界温度太高不利于燃料燃烧的热量释放；同样,提高环境压强,有助于增大系统的热量释放；当温度为2400K恒定的情况下,贫燃料时的主要产物为HBO2 (g)、B2O3(g)和BO2 (g),富燃料时的主要产物为B2O3(g)、B2O2(g)、BO(g)和HBO(g).%A series of calculations of B/0 and B/C/H/O system thermal equilibrium were conducted based on the Gibbs principle of minimum free energy. Some results were obtained. In B/0 system,when B/O mole ratio is 2:3,the main gas phase boron contained products turn from B2O3(g) to BO(g) and BO2(g) with the rise of temperature. Improving the environmental pressure helps to increase the heat release of boron combustion. When the temperature is kept at 2 400 K,B2O3(g) and BO2 are the main products in poor fuel condition while B2O2(g) ,BO(g) and B2O2(g) are the major products in rich fuel condition. As to B/C/H/ 0 system,B/C/H/O mole ratio is settled to be 2: 1: 2: 6. The main combustion products are HBO2 (g) ,CO2 (g) ,H2O and B2O3 (g) when environmental temperature is relatively low and when ambient temperature rises,the major combustion products are CO (g) ,BO(g) and so on. It shows that high temperature is unfavorable for heat release of boron combustion. Like B/O system,improving the environmental pressure helps to increase the heat release of B/C/H/O system combustion. When the temperature is kept at 2 400 K,HBO2(g) ,B2O, and BO2(g) are the main products in poor fuel condition while B2O,(g) ,B2O2(g) ,BO(g) and HBO( g) are the main products in rich fuel condition.
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