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研究了Al2O3稀释剂添加量对NiO/Al体系燃烧速度及体系产物形貌的影响,结合绝热温度的计算结果,基于Merzhanov等提出的燃烧波速公式,根据体系ln(v/Tad)-1/Tad的Arrhenius图,测定了添加Al2O3后NiO/Al体系的反应激活能。研究结果表明:对于NiO/Al体系,在一定范围内(0～5%,25%～35%,质量分数)添加Al2O3稀释剂时,体系绝热温度与燃烧速度均不发生较大变化;体系的反应过程受到压块内铝反应物传质过程的影响,高于2740K时(Al反应物沸点温度),体系的表观反应激活能为(64±14)kJ/mol,温度低于2740K时,压块内的传质过程将以毛细作用为主,体系的反应激活能为(189±15)kJ/mol。
Based on the calculation of the adiabatic temperature, based on the combustion wave velocity formula proposed by Merzhanov et al., According to the system ln (v / Tad) -1 / Tad, the influence of the amount of Al2O3 diluent on the combustion rate and the product morphology of NiO / Arrhenius diagram, the reaction activation energy of the NiO / Al system after adding Al2O3 was measured. The results show that for the NiO / Al system, the adiabatic temperature and the burning rate of the system do not change much when Al2O3 is added within a certain range (0-5%, 25% -35%, mass fraction) The reaction process is affected by the mass transfer process of the aluminum reactants in the briquette, which is higher than that at 2740K (Al reactant boiling temperature). The apparent activation energy of the system is (64 ± 14) kJ / mol. When the temperature is lower than 2740K, The mass transfer process in the compact will be dominated by capillary action, and the reaction activation energy of the system is (189 ± 15) kJ / mol.