Preparation and Microstructure of Al-pillared Interlayered Montmorillonite

Al-pillared interlayerad montmorillonite (Al-PILM) was prepared using the artifcial Na-mont-morillonite from the Qingfengshan betonite nime as a starting material mixed with Al-pillared solutions.The micorstructure of the materials was studied by an X-ray powder diffractometer and a Fourier transfomr infrared (FTIR) spectrometer,The results indicated that the basda spacing [d (001) value ] of the mateials was increased significantly to 1.9194 nm relative to Na-montmorillonite (1.2182 nm) ,After calcined for 2 h at 300 ℃ ,the significantly to 1.9194 nm relative to Na-montmorillonite (1.2182nm) ,After calcined for 2 h at 300℃,the basal spacing was stailized at 1.8394 nm and the layered structure of the materials not destroyed .Themal analysis was conduted by a thermal gravimetry and differential thermal analysis (TG-DTA) instrument,it showed that Al-PILM lost physically adsorbed water below 230.6℃ and water formed by dehydorxylation of the pillars at around 497.1℃,with a peak of the phase transformation at 903.0℃.     

药膳配伍规律研究

从《中国药膳大辞典》中抽出的1287条药膳对其配方中的中药、食药及食物使用种数和重量情况,配方使用中药、食药、食物种类及其出现频率,中药、食药与食物的配伍情况,药膳成形的类型及其出现频率等进行统计分析。结果表明:本研究所用的历代各类文献226种,药膳配方中的中药与食药所占的比例要小于食物所占的比例,具有补气、补血、养阴等作用的中药、食药、食物使用频率较高;食物粳米与中药、食药的配伍应用十分广泛;菜肴类型所占的比例最大,汤、酒、粥、羹、茶、饮也占有较高比例。     

企业设立和生产经营活动中的税务筹划

开展税务筹划是纳税人的必然选择。税务筹划贯穿于企业经济活动的全过程,开展税务筹划对于企业提高经济效益具有积极的现实意义。     

SnO2超细粉末制备中粉体团聚的形成及防止

本文对ＳｎＯ２超细粉末制备中粉体团聚的形成机理进行了初步讨论．采用非均相共沸蒸馏工艺，有效地对水合ＳｎＯ２胶体进行了脱水，防止了粉体团聚的形成，成功地制备出了ＳｎＯ２超细粉末     

PREPARATION OF NANOSTRUCTURED TUNGSTEN POWDERS

The preparation of nanostructured tungstenpowders has been studied by using the characteristics of high-er temperature, higher chemical reactivity and quenchingtechnology of hydrogen plasma,in which WO_3 solid particlesserved as raw materials. The reduction mechanism of WO_3 athigh temperature has been also discussed. The composition,particle size distribution and morphology of nanostructuredtungsten powders have been measured by X-ray diffraction,small angle X-ray scatter and TEM. Tungsten powders ofmean particle size of 40 nanometer,and specific surface areaof 3×10~4m~2/kg have been prepared. The shape of nanostruc-tuted tungsten powders is sphere.     

非晶态合金催化剂的研究进展

非晶态合金是一种新型的催化材料，对其制备，表征和催化性能方面自８０年代初期以来所取得的研究成果进行了综述，详细介绍了非晶态合金催化剂及其应用的进展。     

纳米晶材料的制备、结构性能及其进展

纳米晶材料（ｎａｎｏｓｔｒｕｃｔｕｒｅｄｍａｔｅｒｉａｌｓ）是近来发展起来的一种新型材料，其单个晶粒尺寸为纳米级，构成了一种与晶态和非晶态均不相同的新型结构，由此产生了许多独特的性能．本文综述了纳米晶材料的研究动态、介绍了纳米晶材料的制备、结构表征和性能研究的进展及纳米晶材料的发展动向。     

磺化蓖麻油制备工艺的研究

本文研究了蓖麻油磺化的工艺条件，通过控制不同的磺化工艺条件，可制备成具有不同工业用途的蓖麻油硫酸化产品。并介绍了硫酸化蓖麻油的工业标准及其在工业上的应用。     

自生介质旋流漆构参数的正交优化试验

采用正文试验方法，优化了自生介质旋流器的结构参数，用该参数制造的旋流器对甘肃及山西等地的煤炭进行分选，获得了满意的效果，洗精煤灰分在９．ｏ％～１１．０％时，不完善度Ⅰ值为０．１５～０．１６．数量效率η为９０．０％～９３．０％。     

金属醇盐水解法制备超细锆钛酸铅微粉的研究

采用丁醇酞、自制乙醇锆和醋酸铅为原料,用金属醇盐水解方法制备出了超细的锆酞酸铅粉,并用示差热分析(DTA)、X射线衍射分析(XRD)和原子发射光谱(TEM)分析等手段对粉末特性进行了分析。实验结果表明,该粉未具有超细、高纯及合成温度低等优点。