从粗铜渣中提取铜、铅、锑试验研究

简述了两段氧化酸浸处理粗铜渣,生产硫酸铜,浸出渣还原熔炼生产铅—锑合金的试验研究。经小试和扩试,可得到二级品以上硫酸铜和铅锑组份大于80%的铅—锑合金。     

PVA/锑搀杂二氧化锡纳米复合材料的结构与性能研究

采用溶液共混的方式制备聚乙烯醇/锑搀杂二氧化锡(PVA/ATO)纳米复合材料,采用红外光谱(FTIR)、差示扫描量热仪(DSC)、光学显微镜、扫描电镜对复合材料的结构及微观形态进行了表征,对复合材料的导电性能及机械性能进行了测试。结果表明:PVA与ATO之间在共混膜中存在强烈的相互作用,这种相互作用可使纳米ATO在PVA基体中分散良好,在ATO含量较低的情况下就可获得导电性能及机械性能良好的复合材料;纳米ATO明显的异相成核效应,能够提高PVA的结晶温度及熔融温度。     

电感耦合等离子体原子发射光谱法测定炼锑泡渣中碲

建立了用电感耦合等离子体原子发射光谱法(ICP-AES)测定炼锑泡渣中碲的方法。选择波长为214.281 nm的谱线作为碲的分析线,只有La 214.281 nm, V 214.274 nm, Pt 214.250 nm, Nb 214.291 nm和 Re 214.297 nm线有干扰,但炼锑泡渣中La、V、Pt、Nb、Re含量都很低,其影响可以忽略,因此不需要进行预分离,样品用王水溶解后可直接进行ICP-AES测定。考察了仪器工作参数对测定结果的影响,并确定了最佳工作条件：观测高度为15 mm,雾化气流速为0.8 L/min,射频功率为1 300 W。方法线性范围为0.01～100 mg/L,线性相关系数为1.000 0,检出限(3σ)为0.007 2 mg/L,样品测定结果的相对标准偏差（RSD）为0.16%,加标回收率为97%～102%。     

POLYMORPH CONTROL OF ANTIMONY WHITE(Sb_2O_3) PREPARED BY HYDROMETALLURGY METHOD

ＰＯＬＹＭＯＲＰＨＣＯＮＴＲＯＬＯＦＡＮＴＩＭＯＮＹＷＨＩＴＥ（Ｓｂ２Ｏ３）ＰＲＥＰＡＲＥＤＢＹＨＹＤＲＯＭＥＴＡＬＬＵＲＧＹＭＥＴＨＯＤ①ＺｈａｎｇＤｕｏｍｏ，ＸｉａｏＳｏｎｇｗｅｎ，ＣｈｏＴｏｎｇｒａｅＬｉｕＺｈｉｈｏｎｇ，ＧｅＲｏｎｇｄｅ，Ｃ...     

Effect of annealing and quenching on superconductivity in Pb and Sb-doped Bi2Sr2Ca2Cu3O x

Samples of the series Bi_1·9−x Pb _x Sb_0·1Sr₂Ca₂Cu₃O _y withx=0, 0·1, 0·2, 0·3 and 0·4 were prepared by the solid-state route. The X-ray and d.c. electrical resistivity data on furnace-cooled and quenched samples are presented. Though the starting composition is 2223, the end products were multiphase with 4334 as the major phase. A superconducting transition withT _c=100K was observed in the pure 2223 sample after quenching. The furnace-cooled samples were metallic, while samples withx=0·1, 0·2 and 0·3 were superconducting after quenching. The amount of the 4334 phase decreases with increasing Pb content. Quenching seems to be favourable for the formation of the 4334 phase.     

The Evolution of Erosion Laser Plasma of Antimony

The time dependence of the population of excited states of particles is investigated under conditions of a target of pure antimony being acted upon by pulsed laser radiation (w = (3–5)×10⁸ W/cm², _g = 1.06 mcm, = 20 ns, and f = 12 Hz). The ways are analyzed of increasing the accuracy of measurements of the laser plasma parameters by emission spectroscopy. The evolution of the mechanisms of formation of excited atoms and ions of antimony in the plasma of a laser jet is investigated under conditions of moderate effect of infrared laser radiation on a target in vacuum.     

Electroluminescence from polyvinylcarbazole films: 2. Polyvinylcarbazole films containing antimony pentachloride

A study was made of the optical absorption and electrical conduction of polyvinylcarbazole films that had been reacted with antimony pentachloride to produce a stable population of carbazole dimer cations. The films were semiconductors with low-field conductivities ranging up to about 10^?3 ohm^?1 m^?1 and depending strongly on their SbCl₅ content, while the conduction at high fields was found to be field-dependent. After consideration of various alternatives, a qualitative model is suggested for this conduction which involves positive charge hopping between carbazole dimer crosslinks at a rate depending upon the crosslink concentration and upon temperature-dependent factors such as the relative orientation of neighbouring dimer groups and shifts in molecular energy levels due to small changes in molecular environment throughout the polymer.     

硫酸锌溶液锑净液技术工业试验

为了消除砷净液技术的安全隐患,决定用锑净液取代砷净液。考虑到锑净液是成熟技术,直接进行了硫酸锌溶液锑净液技术工业试验研究。试验结果表明,使用锑净液技术,溶液中杂质含量符合净化标准,满足锌电解过程的需要。