可溶性硅酸盐体系混合碱的分析

研究了 BaSiO_3和 BaCO_3酸解条件。以百里酚兰为指示剂,分析可溶性硅酸盐体系中混合碱的方法,较之氯化钡法,双指示剂法及系数校正法快速、准确,相对误差在0.2%以下。解决了可溶性硅酸盐体系混合碱分析问题。     

痕量钡的乳状液膜富集

对于乳状液膜技术的应用，作等已研究并报导了二十多种金属离子的富集方法，本又报导了通过P204－N205一煤油－HCl组成的乳状液膜体系富集痕量钡离子的方法，使钡的回民率达93％以上。     

超细硫酸钡在涂料中的应用研究

硫酸钡作为体质颜料广泛应用于涂料中．采用特殊工艺制成的超细硫酸钡有很多其他同类产品所不具有的特性，用其取代水性涂料中10％～25％的钛白粉，结果白度提高，遮盖力没有下降。     

0.05Ba(Cu_(1/2)W_(1/2))O_3-0.95PZT的性能研究

采用固相合成法制备 0 .0 5Ba(Cu1/ 2 W1/ 2 )O3 - 0 .95PZT三元体系压电陶瓷 ,研究了烧结温度对压电陶瓷压电性能的影响 ;通过XRD和SEM测试发现材料仍为钙钛矿结构 ,显微分析表明晶粒之间结合紧密 ,颗粒大小均匀 ;实验结果表明 ,压电陶瓷的压电系数d3 3 为 6 0 5pC/N ,机电耦合系数Kp为 0 .37左右 ,机械品质因数Qm 为 6 0。     

Re-visiting barium isotope compositions of mid-ocean ridge basalts and the implications

Barium (Ba) isotopes can be used as potential tracers for crustal material recycling in the mantle. Determination of the Ba isotope composition of the depleted mantle is essential for such applications. However, Ba isotope data for mantle-derived basalts are still rare. In this study, we reported high-precision Ba isotope data of 30 oceanic basalts including 25 mid-ocean ridge basalts (MORBs) from geochemically and geologically diverse mid-ocean ridge segments and five back-arc basin basalts. The δ138/134Ba values of these samples varied from ?0.06‰ to +0.11‰, with no systematic cross-region variation. Together with published data, we constrained the average δ138/134Ba of global MORBs to +0.05‰±0.09‰ (2 standard deviation, n = 51). Based on depleted MORBs that have (La/Sm)_N < 0.8, low 87Sr/86Sr (< 0.70263), and low Ba/Th < 71.3, we estimated the average δ138/134Ba of the depleted MORB mantle (DMM) as + 0.05‰ ± 0.05‰ (2SD, n = 16) that is significantly lower than the DMM (≈ 0.14‰) reported previously. If a new estimation of the DMM is applied, it is unreasonable to infer that the Ba isotope signatures of the “enriched-type” MORBs (E-MORBs) could be attributed to pervasive sediment recycling in the upper mantle. We, therefore, conclude that the Ba isotope compositions of the E-MORBs could be sourced from the incorporation of subducted altered oceanic crust and/or sediments depending on the Ba isotope composition and other geochemical information of the local mantle.     

铝酸钡的合成条件研究

研究了利用碳酸钡与氢氧化铝高温煅烧合成铝酸钡的条件，对其合成的最优条件进行了探讨。实验结果表明：在温度1200℃，氧化铝与氧化钡的分子比1．2，煅烧时间90min条件下，铝酸钡的合成率可以达到95％。     

油田注水系统中毛细管内硫酸钡结垢动力学分析

通过电感耦合测试技术考察管径、管长、流量、浓度等因素对硫酸钡出口浓度的影响,结合差压法和哈根-泊肃叶公式计算出毛细管内流速变化,给出模拟水源在毛细管内硫酸钡结垢现象与沉积动力学参数。通过物料衡算建立硫酸钡沉积动力学参数,且引入管内流动速率增强系数。结果表明:在实验范围内,流动速率增强系数随着管长和流量的增加而线性增加,而沉积动力学系数随着管径、管长和流量的增加呈现非线性增加的趋势,同时入口浓度对流动速率增强系数和沉积动力学参数几乎没有影响;管内流动速率增强系数和沉积动力学系数与实验结果吻合较好,误差小于(±20)%;管内进口处硫酸钡晶体较小,平均粒径10~20μm,出口段沉积增长像树叶状或菜叶叠加状,晶体颗粒较大,平均粒径50~100μm。     

复配阻垢剂对硫酸钡阻垢效果研究

硫酸钡垢结构致密且一般不溶于酸,目前针对该类垢型最有效的解决办法就是在注入水中加入化学阻垢剂。选取DETPMP、EDTMPS、GY-405、HX-1、AMPS(2-丙烯酸-2-甲基丙磺酸)五种阻垢剂进行复配,采用钡离子络合滴定方法筛选出阻垢效果较好的复配型阻垢剂,再利用正交实验优化阻垢剂的配方。实验结果表明:阻垢剂两两复配时,GY-405与DETPMP在复配比为2:1时对硫酸钡垢阻垢效果最好,阻垢率最高可达到62.36%;三种阻垢剂复配时,利用正交软件可知,在GY-405、DETPMP、AMPS的浓度分别为25 mg/L、25 mg/L、15 mg/L时,该复配型阻垢剂对硫酸钡的阻垢效果最好,可达80%以上。选取Ba2+浓度、温度、矿化度、p H作为影响因素,对复配阻垢剂进行正交评价实验。通过正交实验可知,在四种因素共同作用下,当矿化度为42 g/L、Ba2+浓度为800 mg/L、p H为7、温度为85℃时,复配阻垢剂对硫酸钡阻垢率最大。四种因素中,复配阻垢剂对硫酸钡阻垢效果的影响大小的排序为Ba2+浓度p H矿化度温度。     

锆钛酸铅钡弛豫铁电陶瓷偏压压电效应的研究

研究了锆钛酸铅钡铁电陶瓷的横向场诱应变x     

X射线荧光分析方法在毒重石-钡解石-钡白云石型钡矿评价中的应用

XRFA technology can effectively locate ore bodies in exploring and evaluating the witherite-barytocalcite-barytodolomite type barium deposit. The regression equation for identifying rich, middle-rich, and poor ore and rocks is BaO=0.5614-3.127×10^-5I_f. The X-ray fluorescence intensity limitation for ore and rock is I_f=24 350, those for the poor ore and middle-rich ore, and the middle-rich ore and rich ore are I_f=29 467 and I_f=33 000, respectively. The determined X-ray fluorescence intensity curves vary little in amplitude, and the patterns go gently and stable. So XRFA can be used to survey geological-geochemical profiles and trace back ore bodies. There is no systematic error between the ore grade measured by XRFA and the Ba content measured by chemical analysis. This confirms the effectiveness of XRFA in evaluating this type of barium ores.