大量实验表明: 从相同的初始温度加热到相同的末温时, 微波加热与传统加热生成物产量不同. 本文首先从理论上证明了这一结果, 同时采用硫酸钙结晶实验进行了验证, 理论计算结果同实验测量结果基本吻合. 更进一步, 通过特殊控温方法, 使得微波加热与传统水浴加热从相同初始温度以相同温升速率加热硫酸钙生成反应到相同末温, 对生成的硫酸钙晶体物相与形貌进行了分析, 结果显示: 微波与传统加热条件下硫酸钙晶体物相组成略有不同, 但形貌有明显差异. 即使在相同温升条件, 微波加热过程中的硫酸钙结晶仍然存在“特殊效应”.
Many experiments show the amount of products formed by tradition heating is different from that of microwave heating even though the reaction is heated with the two methods from the same initial temperature up to the same ending temperature. In this paper, we proved this possibility from the chemical kinetics theory. Furthermore, we verified this in calcium sulfate crystallization under microwave irradiation. Through specially designed device, the same temperature rising was achieved in microwave heating and traditional water bath. The phase
and figure of calcium sulphate crystals were investigated. The results show the ingredients by microwave heating are appreciably different to that of tradition heating, but the crystal shape looks quite different. There may be some “special effects” in the calcium sulfate crystallization under the irradiation of microwave.
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