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通过陶瓷内衬复合弯管的制备，研究了ＡｌＦｅ２Ｏ３系重力分离ＳＨＳ技术的合成工艺参数。发现Ｆｅ２Ｏ３粒度较小时能有效促进ＳＨＳ反应转化率，但使反应蔓延速率有所降低；铝热剂的装料密度对燃烧过程具有双重影响；对反应物料进行适当预热处理可极大促进燃烧过程，但预热温度过高，将造成铝热剂中ＣｒＯ３添加剂分解而影响燃烧特性。在Ｆｅ２Ｏ３粒度为－２５０目～＋３５０目、装料密度为１５ｇ／ｃｍ３和预热温度为１５０℃条件下，用重力分离ＳＨＳ法制备的陶瓷内衬复合弯管的各项力学性能均达到较佳值。
Through the preparation of ceramic-lined composite elbow, the synthesis process parameters of gravity-separated SHS of Al-Fe2O3 system were studied. It was found that Fe2O3 can effectively promote the conversion rate of SHS reaction when the particle size of Fe2O3 is small, but the rate of reaction spread is reduced. The charge density of thermite has a dual impact on the combustion process. Appropriate preheating of the reaction materials can greatly promote the combustion process However, if the preheating temperature is too high, the CrO3 additive in the thermite will be decomposed and the combustion characteristics will be affected. In the Fe2O3 particle size of -250 mesh ~ +350 mesh, the loading density of 1 5g / cm3 and preheating temperature of 150 ℃ under the conditions of gravity separation SHS prepared ceramic-lined composite pipe bending of the mechanical properties have reached Better value.