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Combustion Synthesis of β-SiAlON

机译：β-SiAlON的燃烧合成

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Since β-Si6-z AlzOzN8-z (0 ＜z ≤ 4.2) was discovered in the early 1970s,it has been developed actively owing to their excellent mechanical and thermal properties.This material has been conventionally produced from a mixture of Si.3N4,AIN,Al2O3 and sintering aids such as Y2O3 based on Solid-State Reaction (SSR) method,in which it was kept at high temperature for long time,causing time-and energy-consuming.To overcome this problem the Combustion Synthesis (CS) has been proposed and the scale-up equipment is now under planning.In this paper,the cutting-edge technology on the combustion synthesis of SiA1ON is reviewed.In this process,once one end of mixed powder of Si,A1,SiO2/A12O3,SiAlON as diluent is ignited at pressurized nitrogen of 1 Mpa,the reaction wave propagates to another one sustainably due to strong exothermic heat without any additional energy in short time.To improve the yield of the product in the combustion synthesis,a diluent was needed to lower adiabatic temperature.The fine powder obtained was sintered by Spark Plasma Sintering (SPS).The CS process will offer many benefits for saving energy,minimizing operating time,producing fine powders without post crushing process,eliminating sintering aids,and cutting total productive cost.The results also appealed a new possibility of SiAlON production for the wide application such as photoluminescence.
机译：自1970年代初发现β-Si6-zAlzOzN8-z（0 ＜z≤4.2）以来，由于其优异的机械和热学性能而得到积极发展。该材料通常由Si.3N4混合物制成，AIN，Al2O3以及基于固态反应（SSR）方法的Y2O3等烧结助剂，在其中长时间保持高温，既费时又耗能。为克服此问题，燃烧合成（CS）本文提出了SiA1ON燃烧合成的前沿技术。在这一过程中，一次混合了Si，Al，SiO2 /在压力为1 Mpa的氮气下点燃Al2O3，SiAlON作为稀释剂，由于强烈的放热热量，反应波在短时间内无任何附加能量的情况下可持续地传播到另一波。为了提高燃烧合成中产物的收率，需要降低绝热温度。所获得的粉末是通过火花等离子烧结（SPS）进行烧结的。CS工艺将为节省能源，缩短运行时间，无需后粉碎过程即可生产细粉，消除烧结助剂并降低总生产成本提供许多好处。结果也很有吸引力SiAlON生产的广泛应用（例如光致发光）的新可能性。

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