以纳米炭黑、微米碳粉为碳源，采用碳热还原法合成AlON粉体和无压烧结制备AlON透明陶瓷。利用X射线衍射仪、扫描电镜、颗粒度分析仪和分光光度计等研究碳源对粉体及陶瓷制备的影响。结果表明：碳源尺寸及形貌与A lO N粉体的合成温度、粉体形貌及颗粒大小密切相关；采用纳米炭黑降低了A lO N粉体的合成温度，在1730℃合成了单相粉体；采用微米碳粉在1750℃煅烧2h条件下制备了高纯度的AlON粉体，从而制备了高透光率的AlON陶瓷，该样品（1mm厚）在1000～5000nm波长范围内的直线透过率在80％左右，在3．93μm波长处光学透过率最高可达83．7％，其平均晶粒尺寸为110～120μm。
Nanosized carbon black and micron carbon pow der w ere used as the carbon sources to syn‐thesize AlON pow ders by carbothermal reduction method and prepare transparent AlON ceramics by the synthesized AlON pow ders through pressureless sintering .Effects of the carbon sources on the synthesis of the AlON powder and the fabrication of the transparent ceramics were investigated by XRD ,SEM ,particle size analyzer and spectrometer .The results show that the size and the morpholo‐gy of the carbon sources are closely related with the calcining synthetic temperature ,the morphology and the particle size of the obtained AlON powder greatly .The addition of the nanosized carbon black decreases the calcination temperature to 1730℃ at which the single phase AlON powders are synthe‐sized .High purity AlON powders prepared by the micron carbon powders calcined at 1750℃ for 2 hours are used to fabricate the highly transparent AlON ceramics .The in‐line optical transmittance at 1000‐5000nm wavelength of the AlON ceramic sample (1mm‐thick) is almost 80% ,with the max transmittance of 83 .7% at 3 .93μm wavelength .The average grain size of the obtained AlON trans‐parent ceramics is in range of 110‐120μm .
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