摘要
磁场常可显著影响溶液性质。本文报道了磁处理对于以ＮＨ３·Ｈ２Ｏ和ＮａＨＣＯ３两步调浆法制备活性ＺｎＯ的影响。ＳＥＭ照片表明磁处理后所得活性ＺｎＯ（～０．１μｍ），且分散好。Ｘ射线衍射和ＤＴＡ测试表明磁场处理影响了溶液平衡，从而改变了锌盐沉淀的组成。对结晶过程的热力学和动力学分析表明磁场处理改变了晶核生长自由能、晶核生长速率。认为这两方面因素导致了磁处理与未处理所得ＺｎＯ微粒差异。
Magnetic fields often strongly affect properties of solutions. The effect of magnetic treatment on active ZnO prepared by slurry-making with NH 3·H 2O and NaHCO 3 is reported.SEM photographs show that the active ZnO with magnetic treatment is well dispersed spherical particles with smaller diameter (<0.05μm) compared with that without magnetic treatment (～0.1μm). X-ray diffraction and DTA tests show that the magnetic treatment affects the solution balance,resulting in changing the composition of precipitation of zinc salts.Thermodynamic and dynamic analysis of crystallization processes indicates that the magnetic treatment has changed the growth free energy and growth velocity of crystal nuclei.It is considered that the difference between active particles obtained with and without magnetic treatment results from the factors mentioned above.
出处
《有色金属》
CAS
CSCD
1998年第3期85-89,共5页
Nonferrous Metals
基金
国家及湖南省自然科学基金
关键词
磁场处理
活性氧化锌
炼锌
magnetic treatment
active zinc oxide
crystal growth
