闪蒸法聚乙烯无纺布的研究进展

介绍了无纺布的发展历程以及我国无纺布的现状，着重讨论了开展闪蒸法聚乙烯纺粘型无纺布研究的意义、方法、生产工艺。     

无机片状微晶对化学光源发光效率的影响研究

以双（2,4,5-三氯-6-正丁烷氧羰基苯基）草酸酯（简称CPPO）和红色荧光剂罗丹明B组成的过氧草酸酯类化学发光体系为研究对象,从粒径、用量和种类的角度讨论了分散剂云母等对体系发光效率的影响．结果表明,添加30μm云母50mg后,体系的发光寿命、强度均显著增加,发光效率较高。     

Study on Luminescence Properties and Crystal-Lattice Environment of Eu^2＋ in Sr4-xMgxSi3O8Cl4：Eu^2＋ Phosphor

According to the Van Uitert experimental equation, crystal-lattice environment of Eu^2 in the Sr4Si3O8C14 crystal was discussed. By adding Mg^2 to the host lattice, Sr4-xMgxSi3O8C14:Eu^2 was synthesized and the emission peak shifted from blue-green (488nm) to blue-violet (411nm) with the increase of amount of the magnesium which replaced the strontium. By analyzing the spectra of Sr4-xMgxSi3O8C14:Eu^2 the two Eu^2 emission centers were found because of the change of crystal-lattice environment in the host and the crystal structure was obtained by X-ray diffraction data.     

Preparation of Non-Grinding Long Afterglow SrAl2O4 ：Eu^2＋ , Dy^3＋ Material by Microwave Combustion Method

The non-grinding long afterglow material SrAl2O4：Eu^2＋ , Dy^3＋ was prepared by combustion method in home mierowave oven direetly, after dispersant, frother, eomburent, and mineralizer were added into the reacting system. XRD analysis showed that the powders were nearly pure SrAl2O4 phase with few other phases, and the size of the grain was 41.1 nm. Fluoreseenee speetrum results indieated that there were 2 exeitation peaks loeated at 345 and 400 nm, and the emission peak loeated at 516 nm, afterglow lasted up to 30 min or more. The mierowave eombustion method has advantages of less time, low temperature and no grinding process, and the material made by the method has good luminescent property.     

煤的芳烃化学研究进展

当世界上的石油资源逐渐枯竭之后，煤能否成为２１世纪化学工业的原材料？科学家们正面临极富感染力的挑战，即寻找和发展一条利用液化煤中的芳烃化合物合成有机化学品的新途径。近期研究表明，新兴的煤化学工业具有很大的发展潜力。本文主要讨论和介绍煤的非燃料利用问题，研究发展由煤制取芳烃化学品和材料的可能途径。综述有关文献２６篇。     

Spectral Characteristic and Its Regularity of Rare Earth Ions in Inorganic Microporous Material Ⅰ.The Spectral Characteristics of Eu~(3 ) in NaY,NaX and NaA Zeolites

In this paper,we have investigated the spectral characteristics of Eu~(3 )ion sorbed on NaY,NaX and NaAzeolites.During calcination,the influence of Eu~(3 )ion's positions in zeolites on its spectral structures are dis-cussed emphatically.The experimental results show that the electric dipole-to-magnetic dipole transition inten-sity ratios of Eu~(3 )emission in NaY,NaX and NaA zeolites calcinated at the same temperature increase inproper order.The bonding actions between Eu~(3 )ion and framework oxygens are studied by the measurementsof excitation spectra and X-ray photoelectron spectroscopy.In the Eu~(3 )content ranging from 0.95% to10.5%,the concentration quenching of the fluorescence in Eu(Ⅲ)-NaY is not observed.     

表面包覆制备云母系珠光颜料研究现状

介绍了天然白云母表面包覆金属氧化物、非金属氧化物、稀土氧化物和有机颜料或染料等制备云母系珠光颜料的研究现状     

丙酮酸及系列产品的检测与应用

丙酮酸及系列产品在化工、生化、制药和农用化学品等工业及科学研究中有着广泛的用途.丙酮酸及系列产品的纯度、含量、杂质等质量指标与合成方法有关,不同的应用途径对这些指标也有着不同的要求.本文综述了丙酮酸及系列产品质量指标的检测方法,以及丙酮酸及系列产品的应用现状.