205～350nm紫外高功率可调谐激光的产生

以355nm的主被动锁模YAG激光器输出的皮秒单脉冲做为泵浦源,利用非线性激光晶体BBO的倍频调谐特性,将改进型的离散角补偿的双晶BBO晶体产生的参量光,采用双块BBO晶体把参量光倍频,即可得到调谐范围为205～350nm的紫外高功率激光输出.     

二丙酮醇生产工艺的改进

探讨了用强碱性阴离子交换树脂催化下合成了二丙酮醇的适宜工艺，选择了合适的工艺条件，反应周期短，催化剂寿命长，如，反应从催化剂上端进行，反应温度２０～２５℃。单程反应的最短时间为４ｈ，收率９２％，比重０．９３，折光率１．４２４０～１．４２４２产品质量与文献值相符，催化剂寿命大于１５０ｈ。     

JF132型克劳斯惯性台架式摩擦材料试验机电-液伺服系统设计

介绍了ＪＦ１３２型克劳斯试验机电－液伺服系统的组成、特点及工作原理，建立了系统的动态方程及结构方框图；分析了系统动态响应频率和阻尼比，提出了系统的校正方法，并探讨了应用电－液比例阀的可能性；通过对稳态误差的分析，指出制动器安装的正确与否将直接影响系统的测试精度。     

凸包型推土板减粘降阻的有限元分析

仿生几何非光滑表面的减粘降阻功效已被大量的试验研究所证实。由于几何非光滑结构单元的大小和分布对减粘降阻效果具有显著的影响，故对其与土壤相互作用的定量分析是必要的。本文对凸包型几何非光滑表面与土壤相互作用进行了三维有限元分析，并将其同光滑表面与土壤相互作用的有限元分析结果进行了比较，分析了减粘降阻的原因。     

同时考虑流动损费和传热强化的换热网络合成

详细论证了在求解换热网络优化狭点温差△T_mtn,opt过程中,同时考虑换热器流动(火用)损、匹配单元优化和传热强化的必要性.提出以“Supertargeting”所给出的最优狭点温差为初值向狭点温差增大的方向寻求最优解的方法.文中对影响△T_min,ovt大小及其与初值之差的经济条件和复合线特性进行了讨论;提出了新的换热网络优化合成策略.用3个实例来说明所提出方法的优越性.     

聚甲基丙烯酸甲酯／镉黄颜料色母粒的合成及其研究

采用亚硫酸氢钠、过氧化二苯甲酰作引发剂,在无机镉黄颜料水悬浮液中,引发甲基丙烯酸甲酯进行聚合反应,得到了镉黄颜料色母粒。对该种色母粒作了红外光谱及DTA、TG分析,并探讨了其反应机理。     

铋基烧绿石陶瓷及其微波特性

介绍了低烧结温度的铋基烧绿石系介质陶瓷的结构特点和微波响应行为。以铋基烧绿石中典型的Bi2O3-ZnO-Nb2O3系及其四元系固溶体陶瓷为例，详述了这些体系的相结构、相变及其改变其微波介电性能的途径。指出低烧结温度的铋基烧绿石系介质陶瓷的基本实验制备工艺与检测技术，并讨论了进一步降低烧结温度的方法，对其今后的发展进行了展望。     

无氨耐燃烧酚醛注塑料的研究与应用

介绍无氨耐燃烧酚醛注塑料的制备、成型条件和性能。该注塑料耐漏电起痕指数高,阻燃性能优异,使用中不释放氨,从而不腐蚀电器、仪表金属嵌件和电气触头,是精密电器、仪表的关键材料,成功用于冰箱压缩机过载保护器外壳。     

Thermal and optical properties of PMMA–titania hybrid materials prepared by sol‐gel approach with HEMA as coupling agent

A series of sol‐gel derived organic–inorganic hybrid materials consisting of organic poly(methyl methacrylate) (PMMA) and inorganic titania (TiO₂) were successfully synthesized by using 2‐hydroxyethyl methacrylate (HEMA) as coupling agent. In this work, HEMA is first copolymerized with methyl methacrylate monomer at specific feeding ratios by using benzoyl peroxide (BPO) as initiator. Subsequently, the as‐prepared copolymer (i.e., sol‐gel precursor) is then cohydrolyzed with various contents of titanium butoxide to afford chemical bondings to the forming titania networks to give a series of hybrid materials. Transparent organic–inorganic hybrid materials with different contents of titania are always achieved. Effects of the material composition on the thermal stability, optical properties, and morphology of neat copolymer and a series of hybrid materials, in the form of both coating and free‐standing film, are also studied by differential scanning calorimetry, thermogravimetric analysis, UV–Vis transmission spectra, refractometer, and atomic force microscopy, respectively. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 94: 400–405, 2004     

Simultaneous recovery of Pb and PbO2 from battery plant effluents. Part II

Results are reported of experiments and modelling of cathodic Pb and anodic PbO₂ electrodeposition, aimed at developing a process using both reactions simultaneously for treating aqueous effluents from lead–acid battery recycling plants. Pb(II) solubilities and equilibrium potentials were calculated as functions of pH and sulfate activities. Using kinetic parameters from the literature or determined experimentally, models were developed for current density–potential and current efficiency–potential relationships, together with the current density dependence of specific electrical energy consumptions for Pb(II) recovery. Experimental current density–potential and charge efficiency–potential relationships were in broad agreement with model predictions, with near unity current efficiencies for mass transport controlled PbO₂ deposition from electrolytes containing 1 mol Pb(II) m^–3 at pH 12. However, charge efficiencies for cathodic deposition of lead were typically 0.2 for 1 mol Pb(II) m^–3 + 1 mol O₂ (aq) m^–3; removal of dissolved oxygen was predicted and determined to increase current efficiencies to near unity. Pb(II) concentrations were depleted to <60 ppb in a batch recycle reactor system with graphite felt anodes and graphite or titanium felt cathodes. Simultaneous cathodic Pb and anodic PbO₂ electrodeposition resulted in more rapid Pb(II) depletion than for either reaction separately.