氯酸钠氧化Mn^(2+)沉积化学MnO_2及其特性研究

STUDY ON THE CMD OBTAINED FROM OXIDIZING Mn^(2+) BY NaCIO_3

ＭｎＣｌ２·４Ｈ２ Ｏ与（ＮＨ４）２ＣＯ３ 在控温、控酸度条件下制得ＭｎＣＯ３ 后，用浓ＨＮＯ３ 溶解，再以氯酸钠氧化Ｍｎ２ ＋ 沉积的化学ＭｎＯ２（ 简称ＣＭＤ） ，对其进行ＭｎＯ２ 含量、视比重、肼指数、磁化率、放电性能以及红外与差热分析。结果表明，如此制得的ＣＭＤ 电化活性较高，有望替代电解ＭｎＯ２（ 简称ＥＭＤ） 作为干电池的阴极活性材料。

NaCIO 3 is produced when MnCl 2·4H 2O reacts with (NH 4) 2CO 3 under given conditions (by controlling reactions temperature and acidity and so on) and dissolved by the concentrated HNO 3,Mn 2+ is oxidized by NaClO 3 under a certain conditions.The MnO 2 sample (No.1) so obtained and the other two MnO 2 samples (No.2 and NO.3) are characterised with chemical analysis (such as MnO 2 contents,apparent density,hydrazine activity,magnetic susceptibility and discharge performance etc.),infrared studies and differential thermal analysis.The results obtained from the above studies show that the MnO 2 sample (No.1) giues promise as active cathode material in dry cells.