材料合成新技术──自蔓延高温合成

自蔓延高温合成（ＳＨＳ）是目前被广泛开发用于工业陶瓷和其它先进材料制备的一种独特的先进工艺技术。本文对生产高科技材料的自蔓延高温合成技术方法进行了介绍，并分析了该工艺的特点及其理论基础，同时还讨论了影响材料合成的因素。     

一种新颖的跳频振荡器

摘要本文综合考虑到频率合成技术及单端口体波谐振器HBAR的特点提出了一种基于一阶非线性PLL的锁相频率合成方案。文中对这种跳频方案的原理、性能特点作了详细论述、并通过实验、从不同角度对本方案进行了说明、同时对整机的各项指标作了详尽测试:在HBAR无载Q_N值为4000的情况下,该多模跳频振荡源的捷变范围为770MHz—840MHz、捷变时间小于20μS。杂散分量低于—60dB、二次谐波分量低于—34dB。离散捷变频率点为16点,构成闭环跳频系统后,对开环VCO的短稳改善了三个量级:从1.3×10~(-5)/ms到1.6×10~(-8)/ms及9.56×~(-7)/s到1.69×!0~(-9)/s,尤为重要的是该多模跳频振荡源达到此性能所需的硬件量很小,因此在对体积要求苛刻的场合、此种跳频方案具有极强的竞争力。     

中置式与后置式副产蒸汽氨合成塔的研究

带中置锅炉的氨合成塔和带后置式锅炉的氨合成塔，在结构和节能方面有许多异同之处．本文经过计算，定量地对这两种塔进行比较．     

铸造用有机酯固化剂合成工艺条件及装置选择

分析了铸造用有机酯固化剂醋酸甘油酯和乙二醇醋酸酯合成工艺原理及装置,同时对有机酯合成工艺条件中脱水剂和催化剂的选择的理论依据进行了分析,得出铸造用有机酯固化剂的最佳合成工艺装置和脱水剂、催化剂.     

铸造用聚氨酯粘合剂组份Ⅰ酚醛树脂合成研究

铸造用的聚氨酯粘合剂组合物，主要由极性和非极性溶剂溶解的酚醛树脂组份I和非极性溶剂稀释的聚异氰酸酯组份Ⅱ组成。组份Ⅰ酚醛树脂结构、性能是决定该类粘合剂性能因素之一。本文对铸造用聚氨酯粘合剂的组份Ⅰ酚醛树脂结构、合成方法、原料材料选择等问题进行了分析讨论，为铸造用聚氨酯粘合剂的组份Ⅰ的制备和苯醚型酚醛树脂的合成提供一些参考。     

固体火焰与燃烧合成的基本概念及应用

对固体火焰与燃烧合成的基本概念与应用进行了综合评述，尽可能对固体火焰与气体火焰的特点进行比较，并对燃烧合成与其它传统工艺进行了比较。     

Preparation and Characterization of K_n|Ga(H_2O)MW_(11)O_(39)|·xH_2O

In this paper the heteropoly complexes K_n[Ga(H_20)MW_(11)O_39)]·xH_20 [M=Cu(Ⅱ), Co(Ⅱ), Cr(Ⅲ),Fe(Ⅲ), Mn(Ⅳ)] have been prepared in this laboratory firstly. The products were characterized by chemicalanalysis, ionexchange, IR, UV and X-ray powder diffraction.     

8-羟基喹啉-N-氧化物和5,7-二硝基-8-羟基喹啉-N-氧化物与Au(Ⅲ)、Pd(Ⅱ)的配合物之合成

合成4种标题配合物,用元素分析、红外和紫外光谱、摩尔电导、核磁共振氢谱、荧光光谱及X射线粉末衍射物相分析研究了它们的组成和性质及其结构。按结构将配合物分为两类,一是含氢键的离子缔合物;一是含金属—氧键的螯环型配合物。     

Synthesis and Physical Properties of EOE and EEO,Triacylglycerols Containing Elaidic and Oleic Fatty Acids

Symmetrical and non-symmetrical triacylglycerols (TAG) containing oleic (O; 9c-18:1) and elaidic (E; 9t-18:1) acids were required as part of a study relating the physical characteristics and functionality of trans-containing TAG with the mouth feel, taste characteristics and related characteristics desired by consumers in frying oils and pastries. To replace the trans isomers in frying oils—a significant part of frying oils prepared by partial hydrogenation of vegetable oils—without loss of the sensory properties desired by consumers, required the initiation of a study relating the structure of trans-containing TAG with such characteristics as melting range, drop points, and other crystalline properties. Elaidic acid was esterified to trielaidin (EEE), and the EEE partially converted (glycerol/p-toluenesulfonic acid) to a mixture containing ca. 40% DAG (the 1,3- and 1,2-isomers). The DAG fraction was separated by silica gel chromatography, the 1,3-dielaidylglycerol (1,3EE-DAG) isomer isolated (structural purity >99%) by crystallization from acetone and esterified with oleic acid (O) to yield EOE. The 1(3)O-MAG was purchased commercially and esterified with E acid to prepare OEE. Both syntheses yielded multi-gram quantities of EOE and EEO, in 80–85% yields, and with structural purities >99%. Thus, by careful selection of the thermodynamically more-stable MAG or DAG precursors, the symmetrical EOE and non-symmetrical EEO isomers could be readily synthesized, and their drop point and melting point values determined. The 1- and 3- positions on the glycerol backbone of the MAG, DAG and TAG molecules are assumed to be equivalent.     

山梨酸正丁酯的合成研究

以山梨酸与正丁醇为原料,对甲苯磺酸为催化剂合成了山梨酸正丁酯,用乙酸丁酯作带水剂,4A分子筛作除水剂,酯化收率可达97.5%.