【摘要】 通过 Ｄｙ３＋ 和 Ｆｅ２＋ 在碱性条件下共同沉淀的方法制得了 Ｄｙ大颗粒氢氧化铁（ Ｄｙ Ｆ Ｈ Ｍ Ａ），在显微镜下检测得颗粒直径为 ３～３４ μｍ 。合成条件： Ｄｙ３＋ 与 Ｆｅ２＋ 的摩尔配比为 ２／１、 Ｐ Ｖ Ｐ浓度为 １６ ｇ／ Ｌ、超声时间为 ５ ｍ ｉｎ。合成后放置４８ ｈ，颗粒分布无明显变化。将前标记得到非放射性 Ｄｙ Ｆ Ｈ Ｍ Ａ 后再活化成１６５ Ｄｙｗ｜ Ｆ Ｈ Ｍ Ａ 与照射 Ｄｙ（ Ｎ Ｏ３）３ 溶液得１６５ Ｄｙ（ Ｎ Ｏ３）３ 溶液后再标记合成１６５ Ｄｙ Ｆ Ｈ Ｍ Ａ 两种方法进行了比较。两种方法制得的颗粒虽形状稍有不同，但大小分布基本无差异，表明在微型反应堆上通过前标记再照射的方法可以替代照射后再合成的方法用于制备１６５ Ｄｙ Ｆ Ｈ Ｍ Ａ混悬液。更多还原

【Abstract】 Dysprosium ferric hydroxide macroaggregates(Dy\|FHMA) is prepared by using Dy 3+ coprecipitation with Fe 2+ . The preparation conditions is that the molar radio of Dy 3+ to Fe 2+ is 2/1, the concentration of PVP solution is 16 g/L, and the time in ultrasonic bath is 5 min. Under these conditions, the particles size of Dy\|FHMA is measured by microscope to be in a range of 3～34 μm. The distribution of particles , size can keep unchanged at least 48 h. 165 Dy\|FHMA produced from the irradiation of pre labeled inactive Dy\|FHMA in a miniature neutron reactor compared with 165 Dy\|FHMA via coprecipitation of irradiated 165 Dy(NO\-3)\-3 with FeSO\-4, the result indicates that both methods can get the same size range of particles, although the shape of particles shows small differences. This new preparation method, as a hopeful substitute for the conventional method proposed by literature, would make the loss of radioactivity and the damage to the operator reduced.\;更多还原