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采用化学制备几种混合稀土化各物水溶胶的方法,对它们的形成条件、冻结性能方面作了初步探讨,並用氟化稀土、碘酸稀土和碘化银三种水溶胶滴作了冻结对比试验。实验结果表明:上述三种水溶胶滴都具有良好的成冰性能,平均冻结温度从高到低的顺序排列为碘化银(—2.8℃),氟化稀土(—3.3℃),碘酸稀土(—3.5℃)。鉴于选用的混合嵇土价格比AgI便宜得多,且来源丰富,故值得在实际应用上采用。
In this paper, several methods for preparing rare earth hydrosols were prepared by chemical methods. Their forming conditions and freezing properties were discussed. Three kinds of droplets of rare earth fluoride, rare earth iodate and silver iodide were used as freezing contrast test. The experimental results show that the above three kinds of droplets have good ice forming performance, the average freezing temperature from high to low in order of silver iodide (-2.8 ℃), rare earth fluoride (-3.3 ℃), rare earth iodate (- 3.5 ° C). In view of the selection of mixed soil price is much cheaper than AgI, and the rich source, it is worth in the practical application.