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采用纯度较高的海绵锆,用高纯氢气深度氢化和梯度脱氢技术制备了超细锆粉。在一定温度下对海绵锆进行高纯氢气深度氢化,生成易于粉碎成细小颗粒的低氧含量氢化锆,氢化锆经高能球磨后达到一定的粒度,再经梯度式温度下脱氢后,可得到超细锆粉。对生产超细锆粉过程中的高纯氢气深度氢化、高能球磨和梯度脱氢过程做了概要分析。结果表明,锆中氢含量随温度的升高逐渐降低,在700℃时氢化锆出现吸热峰迅速分解,锆的氢化反应为400～700℃,脱氢反应温度为600～800℃。对于相同原料制取的锆粉,氧化锆粒度越低,其含氧量越高。
High purity zirconium sponge was used to prepare ultrafine zirconium powder with high purity hydrogen hydrogenation and gradient dehydrogenation. Hydrogen sponge zirconium is hydrogenated at a certain temperature for a high purity hydrogen to generate low-oxygenated zirconium hydride which can be easily pulverized into fine particles. The zirconium hydride reaches a certain particle size by high-energy ball milling and is dehydrogenated by a gradient temperature, Ultrafine zirconium powder. The production of ultrafine zirconium powder in the process of hydrogenation of high purity hydrogen, high energy ball milling and gradient dehydrogenation process made a brief analysis. The results show that the content of hydrogen in zirconium gradually decreases with the increase of temperature. The endothermic peak of zirconium hydride decomposes rapidly at 700 ℃. The hydrogenation reaction of zirconium is 400-700 ℃ and the dehydrogenation temperature is 600-800 ℃. For the same raw material made of zirconium powder, the lower the zirconium oxide particle size, the higher the oxygen content.