Kinetics of microwave synthesis of AlN by carbothermal-reduction-nitridation at low temperature
Kinetics of microwave synthesis of AlN by carbothermal-reduction-nitridation at low temperature
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DOI：
10.1111/jace.15903
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发表时间：
2018-07
影响因子：
3.9
通讯作者：
H. Chikami;J. Fukushima;Y. Hayashi;H. Takizawa
中科院分区：
文献类型：
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作者：
H. Chikami;J. Fukushima;Y. Hayashi;H. Takizawa
氮化铝（AlN）在1000 - 1400°C下由氧化铝和碳粉的混合物在N2气氛中使用2.45 GHz微波合成。在1200 - 1400°C的温度范围内获得了高氮化率（>0.90）。由氮化率计算了2.45 GHz微波辐射下碳热还原氮化反应的表观活化能。所获得的值为79.9 kJ/mol，是使用α-Al 2 O3作为原料的常规合成所报道的能量的11%。这一结果表明，2.45 GHz的微波辐射可以促进CRN反应的动力学，AlN可以有效地在低温下合成。
Aluminum nitride (AlN) was synthesized at 1000‐1400°C from a mixture of alumina and carbon powders using 2.45 GHz microwaves in a N2atmosphere. High nitridation ratios (>0.90) were obtained in the temperature range 1200‐1400°C. The apparent activation energy of the carbothermal reduction and nitridation (CRN) reaction using 2.45 GHz microwave irradiation was calculated from the nitridation ratio. The value obtained, 79.9 kJ/mol, is 11% of the energy reported for conventional synthesis using α‐Al2O3as the raw material. This result indicates that 2.45 GHz microwave irradiation could promote the kinetics of the CRN reaction, and AlN could be effectively synthesized at low temperature.