Preparation of CaO as OLED getter material through control of crystal growth of CaCO3 by block copolymers in aqueous solution

As the starting materials of organic light-emitting diode (OLED) getter, calcium carbonate (CaCO₃) particles with various shapes and crystal structures have been successfully prepared with additives (L64 or PEGPG), which contain blocks of poly(ethylene oxide) (PEO) and poly(propylene oxide) (PPO). These CaCO₃ particles were calcinated into highly crystalline calcium oxide (CaO) nanoparticles with high capacity of water adsorption up to 14.23 wt.%. The CaCO₃ and CaO particles prepared at various conditions were characterized using the field emission scanning electron microscopy (FE-SEM), Fourier transform infrared microscopy (FT-IR), X-ray powder diffraction (XRD), and dynamic vapor sorption (DVS) method.     

Reclaimed water distribution network design under temporal and spatial growth and demand uncertainties

A significant—but underutilized—water resource is reclaimed water, i.e., treated wastewater that is reintroduced for various purposes. Especially in water scarce regions, reclaimed water is often the only remaining source of water to meet increasing population and water demands. In this paper, we develop a new model formulation for the cost-effective branched reclaimed water network design and solve it with an exact optimization method. We consider both construction and energy costs expended over a twenty-year period. Unlike other formulations, uncertain reclaimed water demands, temporal and spatial population changes are explicitly considered in our two-staged construction and expansion model. In order for the system to meet higher demands during the peak times and to evaluate energy use, we consider two pumping conditions: one with average demands, which is used to compute the average energy consumption, and the other with peak demands, which dominates pipe size and pump station capacity selection. By introducing binary variables that indicate discrete pipe and pump sizes, we linearize the nonlinear hydraulic equations and objective function terms. We develop methods to significantly reduce the problem dimension by exploiting the problem characteristics and network structure. Our computational results indicate that these methods are very effective. Finally, we apply our model to design a reclaimed water network for a realistic municipal system under estimated demand and population scenarios, and analyze the sensitivity of the system to model parameters.     

均匀橄榄状α-Fe_2O_3胶体粒子成长的动力学分析

本文对硝酸铁的酸性溶液当存在少量草酸时升温水解而生成均匀橄榄状α—Fe_2O_3胶体粒子的动力学进行了分析。按照 Nielsen 时矩(Chronomal)理论,晶体的成长过程符合二级多核层表面反应控制机理,并由此求出速度常数。计算的表面控制过程的活化能值表明,草酸参与了三价铁离子的络合过程。     

Cluster生长的理论研究——Ⅰ分式维数和格子格型

本文分析了Cluster生长的几种典型模型。并着重对这些模型中的重要概念——分式几何、分式维数和格子模型给予详细的论述。     

胶体粒子絮凝、沉降的计算机模拟 Ⅰ 格子模型对Cluster生长形态的影响

用Cluster生长自调整模型(SAGC),考察了不同格子模型条件下,Cluster的生长形态,研究了不同格子模型模拟得到的Cluster的分式维数D的变化,据此说明格子模型对Cluster生长形态的影响。结果得出,格子模型对Cluster的生形态有影响,呈现的明显规律是:D无格子相似文献   

表面裂纹准静态断裂扩展形貌的研究

表面裂纹疲劳扩展和断裂扩展过程中几何形貌的预测是未爆先漏（ＬｅａｋＢｅｆｏｒｅ－Ｂｒｅａｋ）评判理论研究的一个重要课题。本文用多试件法研究了表面裂纹准静态断裂扩展形貌变化规律，介绍了主要试验方法与试验结果。     

Ni-10?合金的深过冷与快速枝晶生长

Ｎｉ－１０％Ｆｅ合金的深过冷与快速枝晶生长魏炳波，杨澍，Ｄ．Ｍ．Ｈｅｒｌａｃｈ聪胃深过冷是指通过去除异质晶核可以使液态金属冷却至远低于其平衡凝固点的温度下而不发生结晶．一旦深过冷熔体中发生晶体形核，晶核的生长速度可以不受外部冷却速度控制．因此，深过冷...     

Al—Si—Cr—Mo合金蠕铁热物性的研究

采用正交设计法，对Ａｌ－Ｓｉ－Ｃｒ－Ｍｏ合金蠕铁的热物理性能进行了测试，并分别结合方差分析，对Ａｌ、Ｓｉ、Ｃｒ、Ｍｏ各项性能影响的显著性进行了判断．结果表明，Ａｌ－Ｓｉ－Ｃｒ－Ｍｏ蠕铁具有很好的抗氧化性、抗生长性和抗热疲劳性能，是一种较好的玻璃模具材料．     

掺镁铌酸锂晶体生长的研究

用丘克拉斯基技术从固液同成分熔体中生长了Mg2LiNbO3晶体，介绍了掺镁铌酸锂晶体生长的最佳工艺条件，所生长的晶体具有抗光折变性能，光学均匀性好。     

二个变量指数增长拟线性散度型椭圆方程解的存在性

得到了二个自变量具指数增长拟线性散度型椭圆方程－Ｄｉ（ａｉ（ｘ，ｕ，Ｄｕ））＋ｂ（ｘ，ｕ，Ｄｕ）＝０的Ｄｉｎｉｃｈｌｅｔ问题解的存在性。