On the Use of Silver Plated Nano Aluminum Nitride and Silver Plated Chopped Carbon Fiber to Prepare Electrically Conductive Adhesives with High Thermal Conductivity

To satisfy the high electrical and thermal conductivity required for the development of microelectronic products, silver plated aluminum nitride (Ag/AlN) and silver plated chopped carbon fiber (Ag/CF) were added into an acrylate resin to prepare electrically conductive adhesives (ECAs) with high thermal conductivity. The Ag/AlN was prepared by subjecting AlN to an electroless silver plating using a Pb-free activation method. The Ag/AlN has good electrical and thermal conductivity compared to the AlN without treatment. When the weight fraction of Ag/AlN is 45 ωt%, the electrical conductivity of ECAs based on acrylate resin filled with Ag/AlN is 1.5 S/cm, and the thermal conductivity reaches 2.1 W/(m · K). With the addition of 3 ωt% Ag/CF as supplement filler, the electrical conductivity has a sharp increase to 17.8 S/cm because of the formation of conductive networks in the ECAs. However, the shear strength has an apparent loss, falling from 4.2 to 1.1 MPa.     

利用磨细矿渣粉制备复合水泥

在复合水泥生产过程中,引入经预磨细的矿渣微粉,改善了水泥的物理力学性能,显著提高了水泥强度增长率,降低了制造成本。本文探讨了磨细矿渣微粉与粉煤灰、钢渣生产复合水泥的具体工艺及水泥的水化机理。     

Synthesis of Higher Chromium Oxides Using Ozone Gas

Ozone gas in an ambient pressure was blown to Cr₂O₃ powder. The higher oxides, CrO₃, Cr₂O₅, Cr₅O₁₂, and Cr₃O₈, could be synthesized above 373 K. Both CrO₃ and Cr₂O₅ were found by in situ X-ray diffraction measurements. It was known that they could be produced only at high pressure of oxygen and at high temperatures. The CrO₃ formed was melted at 470 K in an ozone atmosphere and decomposed above 500 K. Because of thermal decomposition of ozone and the higher oxides, no higher oxides were formed above 660 K. The phase formation was discussed using the kinetic stability diagram.     

Effect of Ozone Injection on the Catalytic Reduction of Nitrogen Oxides

The improvement in the catalytic reduction of nitrogen oxides (NO_x) by means of the ozone injection into the exhaust gas was investigated. Nitric oxide (NO) in the exhaust gas was first oxidized to nitrogen dioxide (NO₂) by ozone, and then the exhaust gas containing the mixture of NO and NO₂ was directed to the catalytic reactor where both NO and NO₂ were reduced to nitrogen. The ozone injection method was very efficient for the oxidation of NO to NO₂ in a wide range of temperatures, and the increase in the content of NO₂ by the ozone injection remarkably improved the performance of the catalytic reactor.     

The Use of Ozone to Kill Fungi in Wood

Systems for the controlled generation, circulation and destruction of residual ozone have been commercialized and these systems could be used to eliminate pests from solid wood packaging materials such as pallets. A preliminary test with small cubes showed that ozone fumigation could kill decay fungi in wood. Subsequent trials with larger wood samples were less ineffective, suggesting that the inability of ozone to penetrate deeply into wood will limit its potential for pest mitigation.     

抛光废料制备隔热保温陶瓷砖

抛光废渣产生量大,回收利用率低,研究大量利用抛光废渣的新途径不仅能解决抛光废渣的处理问题,也将带来巨大的经济效益。本文分析了利用抛光废渣制备隔热保温陶瓷砖的背景、废弃原料处理、抛光渣发泡原理、制备工艺、性能影响因素等。     

Use of Methionine Alkylation to Prepare Cationic and Zwitterionic Block Copolypeptide Vesicles

We have developed a facile method for preparation of ionic copolypeptide vesicles that requires no protecting groups or expensive components. We prepared amphiphilic copolypeptides containing segments of water-soluble methionine sulfonium residues. These were derived by aqueous phase, direct alkylation of a fully hydrophobic precursor diblock copolypeptide, poly(L-methionine)₆₅-block-poly(L-leucine_0.5-stat-L-phenylalanine_0.5)₂₀ (M₆₅[L_0.5/F_0.5]₂₀), with simple alkylating reagents. Methylation of M₆₅(L_0.5/F_0.5)₂₀ gave the cationic methyl-methionine sulfonium derivative M^M₆₅(L_0.5/F_0.5)₂₀, and carboxymethylation gave the zwitterionic carboxymethyl-methionine sulfonium derivative M^C₆₅(L_0.5/F_0.5)₂₀. Assembly of M^M₆₅(L_0.5/F_0.5)₂₀ or M^C₆₅(L_0.5/F_0.5)₂₀ in water gave rise to vesicles with average diameters of a few microns, which could then be extruded to nanoscale diameters. While the cationic M^M-based vesicles were found to be cytotoxic, the zwitterionic M^C-based vesicles were found to possess minimal cytotoxicity.     

酯交换反应制备生物柴油催化剂的研究进展

生物柴油是一种环境友好型的可再生资源,本文介绍了生物柴油的制备技术,并综述了采用酯交换反应制备生物柴油所使用的催化剂的研究进展,简述了各种催化剂的优缺点。     

Ozone and Nitrogen Oxides Generation in Gas Flow Enhanced Hollow Needle to Plate Discharge In Air

Siemens made the first ozone generation system by corona discharge about hundred and fifty years ago. At present mainly two types of atmospheric pressure electrical discharges - corona discharge and dielectric barrier discharge are used for production of ozone. Another type of discharge, which can be used for this purpose, is multineedle to plate electrical discharge enhanced by the gas flow. Contrary to the conventional arrangement when the gas is flowing around the needles we studied the discharge in which the gas was pumped through the needles. Results of studies of ozone and nitrogen oxides production by DC electrical discharge in air at atmospheric pressure with a single hollow needle to plate electrode configuration enhanced by the flow of air through the needle for both polarities of the needle, different airflow rates and currents are presented in this paper.     

利用当地劣质原料研制仿古砖

采用红泥等当地劣质原料研制了300×300mm规格高档红坯仿古砖,结果表明,红坯仿古砖的整体性能好于普通坯,可以充分利用当地劣质原料生产高档有釉陶瓷砖。     

臭氧氧化直接生成锰氧化物处理含铊废水

以臭氧氧化直接生成锰氧化物,采用批实验对锰氧化物吸附处理含铊(T1)废水特性进行研究.结果表明,锰氧化物对T1的吸附等温线符合Langmuir方程和Freundlich方程,Elovich方程和双常数方程能够较好地描述该吸附材料对T1的吸附动力学过程.由Langmuir等温方程计算得出,在pH为10.0、臭氧体积流量3...     

Use of Ozone in the Citrus Industry

The use of ozone for postharvest sanitation and decay control of fruits, vegetables and their products during handling, processing and storage has been investigated for commercial applications. Due to their significant contribution to world trade and human nutrition, citrus fruits are thought to be important commodities. Decay can be observed in these products because of microbial activity and ethylene accumulation throughout storage. Residues of pesticides and other compounds in citrus fruit and food-borne illness outbreaks caused by consumption of contaminated citrus juice are important health issues. In this study, the possible uses of ozone in citrus industry for all these problems, and efficacy, benefits and/or detrimental effects of these applications are discussed.     

Removal Of Pesticides By Use Of Ozone Or Hydrogen Peroxide/Ozone

This article deals with the efficiency of an ozonation step in drinking water treatment plants remove pesticides. These tests are carried out with a laboratory technique, the “OZOTEST” method, which simulates operating conditions on site and allows a complete oxidation assessment.

Efficiency of the two oxidant systems – ozone and ozone coupled with hydrogen peroxide – is evaluated for 11 pesticides commonly analyzed in control laboratories. Comparison of the two systems is made in terms of pesticide removal, but also in terms of ozone consumption. Matrix effects and contact time are also taken into account, and an order of reactivity for each system considered is suggested.     

Pretreatment with Ozone for Gold and Silver Recovery from Refractory Ores

In this work ozonization was studied as pretreatment for two Mexican refractory ores in order to increase the gold and silver extraction. Two methods for contacting ozone with the mineral were studied (indirect and direct). The indirect method did not change the precious metals recoveries for mineral sample A, but increased those of mineral B (from 53 to 88% for gold and from 26 to 78% for silver). The direct pretreatment, only tested in mineral A, did not affect gold and silver recoveries but decreased the extraction time from 40 to 24 hours for maximum metal recovery.     

用烷基化废硫酸与硫化物生产工业硫酸

主要介绍了我国第一套用炼油厂烷基化废硫酸与硫化物制取工业硫酸的生产原理、工艺流程、主要设备、流程特点及效果。并针对进一步完善该技术提出了改进建议。     

Use of Ozone in Night Soil Treatment Process

Ozonation is used for the tertiary treatment, particularly for removal of colour, of the effluent from a night soil treatment plant in Japan. The practical system for effectively controlling the ozone treatment was investigated. The optimum ozonation was accomplished by monitoring the colour. This treatment plant worked in response to a sudden variation in the quality of raw water, i. e., nitrite ion concentration, COD, etc, and the quality of the ozonated water was kept at the levels of COD of 20 ~ 30 mg/2, and colour of 30 units. The water treated by this ozonation plant was found to be free from coliform bocilli, and to exhibit neither so strong acute toxicity to fishes nor mutagenicity.     

The Potential Use of Ozone in Municipal Wastewater

This paper summarizes the potential options applying ozone for the improvement of effluents from wastewater treatment plants. A specific focus will be on the technical aspects of how to integrate ozone technique in existing or new conventional treatment plants. Additionally some large scale projects will be illustrated, where this technique is now in operation. The following aspects are of interest and are discussed: necessary ozone dose range (depends on application, water matrix and contaminants); required components of ozone systems (ozone generator, gas supply, reaction system, off-gas handling); process control, online measurement; potential parameters to be used for process control; design guidelines for the integration of ozone systems; and cost calculations.     

一种制备草铵膦的新方法

[目的]草铵膦是一种高效非选择性除草剂,旨在研发一种成本低、三废少的草铵膦合成方法。[方法]甲基二氯化磷与异丁醇反应得到甲基次膦酸异丁酯,再与1,1-二乙酰氧基-2-丙烯在紫外光照射下,反应得到3,3-(二乙酰氧基)丙基甲基次膦酸异丁酯,然后经Strecker反应和水解得到草铵膦。[结果]路线工艺条件温和,三废较少,总收率61.7%。[结论]方法用紫外光催化反应,绿色环保,为草铵膦的工业化生产提供了一种新方法。     

制取碳酸氢钠的方法

ＺＬ专利号 9310 0 5 38.8授权公告日 1996年 3月 6日 ,授权公告号ＣＮ10 31183Ｃ专利权人 :王　全权利要求书1.在联碱法中制取碳酸氢纳的方法 ,该法包括用碳化塔在 2 0～ 4 5℃下进行一步碳化反应 ,以部分经吸氨、冷却后的重碱分离母液 (氨Ⅰ )与氯化铵分离母液 (母Ⅱ )按体积比Ｎ =0 .5～ 1.6混合后的半母液Ⅰ作为碳化供给液。2 .根据权利要求 1所述的方法 ,其特征是Ｎ 0 .8～ 1.2。说明书 (摘要 )本发明涉及一种在碳酸钠和氯化铵联产的联碱法中制取碳酸氢钠 (下称重碱 )的方法 ,它用碳化塔在 2 0～ 4 5℃下以一步碳化方式完成碳化反应。…