聚合物复合材料填充剂的改性

在前人研究的基础之上，归纳总结了聚合物复合材料填充剂的种类，综述了对其进行表面改性的目的、条件、方法、工艺以及对改性结果的表征等。文章还分析了影响填充聚合物复合材料性能的因素，指出了今后发展的方向。     

复合果胶酶加工番石榴果汁的工艺优化

采用法国产的复合液态果胶酶加工番石榴果汁。研究结果表明,最佳工艺条件为:每千克番石榴果浆加入20mL浓度为0.01mL/mL的复合液态果胶酶、pH为3.5、45℃下恒温酶解5￣6h。使用不同的澄清剂对番石榴果汁进行澄清,结果表明,加浓度为0.5%的明胶溶液20mL/kg果汁中的效果最佳。番石榴果汁,保持了原有果实的营养成分和保健功能,有独特的风味。     

DT型粉状炸药专用蜡的研制

以多种含蜡馏分为基础原料，添加适量DT复合添加剂研制的DT型粉状炸药专用蜡具有优异的分散性和抗水性，可满足各种低梯粉状炸药要求，简化炸药配方，方便操作及其质量控制，以其生产的炸药爆速高，贮存期长，各项性能满足GB12437－2000标准要求。     

内外齿复合冷挤压成型实验研究

通过对轿车转向盘毂件内外齿进行的复合挤压实验研究 ,得到了新式复动式复合挤压模具结构 ,并确定了一种合理的成型工艺方案     

Centrifugal Casting of High Speed Steel/Nodular Cast Iron Compound Roll Collar

Ｈｉｇｈ ｓｐｅｅｄｓｔｅｅｌ (ＨＳＳ) ,ｉｓｃｈａｒａｃｔｅｒｉｚｅｄｂｙｅｘ ｃｅｌｌｅｎｔｈａｒｄｎｅｓｓ ,ｗｅａｒｒｅｓｉｓｔａｎｃｅ ,ａｎｄ ｇｏｏｄｒｅｄｈａｒｄｎｅｓｓ .Ｒｅｃｅｎｔｌｙ ,ＨＳＳｉｓａｐｐｌｉｅｄｔｏｍａｎｕｆａｃｔｕｒｅｈｏｔｒｏｌｌｉｎｇｒｏｌｌｓｔｏｐｒｏｄｕｃｅｓｔｒｉｐｓｏｆｇｏｏｄｓｈａｐｅａｎｄｓｍａｌｌｃｒｏｗｎｗｉｔｈｅｘｔｅｎｄｅｄｒｏｌｌｓｅｒｖｉｃｅｌｉｆｅ[1,2 ] .ＴｈｅＨＳＳｉｓａｐｐｌｉｅｄｔｏｍａｎｕｆａｃｔｕｒｅｒｏｌｌｃｏｌｌａｒｆｏｒ…     

一种有机硫类絮凝剂DTC的合成及性能评价

讨论了由有机伯胺或仲胺和CS2合成二硫代氨基甲酸盐DTC的反应及副反应,简介了合成工艺。根据红外光谱确认了由三乙烯四胺合成的二硫代氨基甲酸盐（以下简称DTC）的结构。以含原油350 mg/L、含悬浮固体55.1 mg/L,含Fe^2＋10.0 mg/L的模拟污水为实验水样,考察了该DTC的絮凝性能,在40℃、pH=6-7、沉降时间30分钟条件下DTC的适宜加量为20 mg/L,此时污水含油量为9.0 mg/L;使用DTC的适宜pH范围在4-8,pH=6为最佳值,适宜温度范围为10-45℃,温度高于45℃时DTC可发生热分解;DTC的除油效果随污水中Fe^2＋浓度增大而改善。在含油89.1 mg/L、含悬浮固体55.1 mg/L、含Fe^2＋13.2 mg/L的油田污水中,DTC的除油率最高,远高于常用絮凝剂PFS,PAC,CPAM,HPAM和PAM。当污水中不含Fe^2＋时,DTC无絮凝除油效果。讨论了DTC在Fe^2＋参与下的絮凝过程。图5表1参8。     

Extracting Electron Densities in N-Type GaAs From Raman Spectra: Theory

In this paper, we present the theory for calculating Raman line shapes as functions of the Fermi energy and finite temperatures in zinc blende, n-type GaAs for donor densities between 10¹⁶ cm⁻³ and 10¹⁹ cm⁻³. Compared to other theories, this theory is unique in two respects: 1) the many-body effects are treated self-consistently and 2) the theory is valid at room temperature for arbitrary values of the ratio R = (Q²/α), where Q is the magnitude of the normalized wave vector and α is the normalized frequency used in the Raman measurements. These calculations solve the charge neutrality equation self-consistently for a two-band model of GaAs at 300 K that includes the effects of high carrier concentrations and dopant densities on the perturbed densities of states used to calculate the Fermi energy as a function of temperature. The results are then applied to obtain the carrier concentrations from Fermi energies in the context of line shapes in Raman spectra due to the coupling between longitudinal optical phonons and plasmons. Raman measurements have been proposed as a non-destructive method for wafer acceptance tests of carrier density in semiconductor epilayers. The interpretation of Raman spectra to determine the majority electron density in n-type semiconductors requires an interdisciplinary effort involving experiments, theory, and computer-based simulations and visualizations of the theoretical calculations.     

超微粉石墨层间化合物FeCl3-NiCl2-GICs的制备及电磁性能研究

以微粉石墨为主体材料合成出不同阶结构的FeCl3-NiCl2-GICs.应用XRD、SEM对产物的晶体结构与表面形貌进行分析表征.采用范德保法测量产物在常温常态下的电阻率,用MODEL9600振动磁强计测量GICs在0～7.958×105A/m磁场强度下的磁化强度、磁化率.测量数据表明异类原子FeCl3、NiCl2插入石黑层间后,GICs的电导率增加1.3～2.9倍,其磁性由石墨的抗磁性转变为顺磁性.     

Mid-Temperature Synthesis of CeO2-TiO2 Complex Compound and Its XRD Structure Study

TiO2 andCeO2 aresemiconductormaterials .TiO2hasthepropertiesofphoto catalysis[1] whileCeO2 hastheabilityofoxygenstorageandcanpromotethedispersionofprecionsmetalsonthesupporter[2 ] .CeO2 TiO2 com plexcompoundwasusedascatalystandspecialfunction almaterial[3～ 5] .ThetraditionalsynthesisofCeO2 TiO2complexcompoundisbyceramicmethodthatusesoxidesasrawmaterialsanditiscalcinedabove 130 0℃[6～ 8] .However ,thestructureandmicrostructureofthecomplexcompoundarenotsuitableforcatalystandfunctionalm…     

Preparation of Compound Ultrafine CeO2 by Wet-Solid-Phase Mechanochemical Modification

To satisfy practical requirements from industrial applications, an alternate route for synthesis compound ultrafine CeO2 powders by wet-solid-phase mechanochemical modification using industrial grade hydrated cerium carbonate as raw material was proposed.The effect of modifier reaction percentage, reaction time, calcining temperature and modifier amount on particle size, density, suspensibility, and hardness of compound CeO2 powder was investigated.The phase evolutions of preparation process were characterized by XRD.SEM micrograph of the final product shows that compound CeO2 powders obtained are well-dispersed, spherically-shaped, uniformly-sized and submicron-sized particles.The method is readily available in raw material, low in cost, simple in process, and has great potential for industrialization.The compound CeO2 powders of different physical properties can be synthesized by controlling the above-mentioned influence factors in preparation process.