摘要
采用Φ函数法，计算了TiB2陶瓷在空气中氧化时的ΔGR°值。计算表明，在700—1100℃的温度区间内，TiB2陶瓷将会发生氧化。在硅碳棒高温炉中进行了TiB2陶瓷的氧化试验，并推导了TiB2陶瓷的氧化动力学公式。研究表明，TiB2陶瓷在空气中中温氧化时，其氧化行为表现为氧化增重随时间的变化服从抛物线规律；在研究的温度范围内，TiB2陶瓷的氧化活化能为44982．8J／mol；TiB2陶瓷材料的氧化主要由氧通过氧化层的向内扩散所控制。
The ΔGR° of TiB2 ceramic which oxidates in atmosphere is calculate by using Φ function. The calculation shows： in the temperature range of 700 - 1 100 ℃, the TiB2 ceramic will oxidize. The oxidative has been done in silicacarbon high temperature furnace, at the same time; the oxidative dynamic formula has been deduced. The study shows： the oxidation weight gain of TiB2 ceramic when it is oxidized in medium temperature atmosphere follows parabolic law as the time increases; in the study temperature range, the oxidative active energy of TiB2 ceramic is 44 982.8 J/mol; the oxidation of TiB2 ceramic is controlled by inside diffusion of oxygen through oxidative layer.
出处
《陶瓷》
CAS
2006年第7期19-21,共3页
Ceramics
