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用硅藻土制备超细白炭黑工艺中氨基硅烷的作用研究 总被引:1,自引:0,他引:1
以硅藻土为原料,用沉淀法制备白炭黑的工艺中,就氨基硅烷KH-550的用量对白炭黑吸油率和比表面积的影响进行了研究,结果表明:改性白炭黑产品粒度分布均匀,可达纳米级,用W4的氨基硅烷改性后的产品具有最大的比表面积,其值为250.184m2/g,改性剂分子与白炭黑颗粒表面发生了化学吸附. 相似文献
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以新疆哈密钾长石和碳酸氢铵为原料采用沉淀法制备了白炭黑.根据单因素及正交实验,确定出最佳工艺条件为:反应温度70℃,钾长石煅烧熟料溶液A质量分数8%,反应时间3h,陈化时间2h,钾长石与分散剂正丁醇用量比为1∶1.875(g∶mL).按HG/T 3061-2009标准对白炭黑进行分析,白发黑中SiO2含量为93.55%,其DBP为2.95 mL/g,比表面积为137.645 m2/g.采用XRD、SEM和TEM对白炭黑进行了微观结构表征.XRD分析表明,白炭黑具有无定型结构.SEM分析表明白炭黑颗粒表面呈现蜂窝状微孔,表面较为疏松.TEM显示白炭黑为球状粒子,平均粒径为16nm,并且其分布较为均匀. 相似文献
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以石棉尾矿盐浸渣为原料,通过碱浸制成偏硅酸钠溶液。向反应容器底液中同时注入偏硅酸钠和硫酸溶液,控制底液pH值稳定在7.5左右沉淀超细白炭黑。考查了超细白炭黑制备过程中偏硅酸钠浓度、反应温度、表面活性剂和电解质用量以及干燥方式对白炭黑样品性能的影响;采用扫描电子显微镜、X射线衍射仪、红外光谱仪及激光粒度分析仪等对所制备白炭黑样品的形貌、物相和粒径等进行了表征。结果表明,偏硅酸钠浓度和温度对白炭黑的生成率有较大影响,醇洗能够有效控制和减少白炭黑样品的团聚现象,在最佳实验条件下制得的白炭黑样品化学结构为无定形水合二氧化硅,比表面积(BET)为102.43m2/g,白炭黑生成率达75%以上。 相似文献
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采用常压碱浸法对含硅尾渣中的Si、Al、Fe元素进行了有效分离,得到了优质硅酸钠浸出液。结果表明:
碱浸实验中,浸出温度108 ℃,浸出时间1 h,碱硅比0.5,液固比1.3 mL/g时浸出效果最佳。得到了Si、Al、Fe 元素含量
分别为140 g/L、140 mg/L和71 mg/L,模数2.26的硅酸钠浸出液。进一步采用化学沉淀法从浸出液中制备了白炭黑,使
用X射线衍射仪和扫描电镜对白炭黑进行了表征,结果表明:白炭黑产品为无定型结构,SiO2含量为99.35%,一次粒子
粒径在50 nm左右,颗粒形貌为葡萄状集合体。 相似文献
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用搅拌磨制备超细粉体的试验研究 总被引:1,自引:0,他引:1
使用介质搅拌磨并以φ0.8~1.4mm氧化锆陶瓷微珠为研磨介质对水镁石、电气石、云母(包括白云母、金云母、绢云母)进行了超细粉碎试验。选择适宜的助磨剂、分散剂、料浆浓度、研磨时间等试验条件,得到了d50=0.78μm、d97=1.85μm的水镁石和d50=0.75μm、d97=1.07μm的电气石,以及d50=0.75μm、d97=1.93μm的云母超细粉体;而且物料的原有晶形在超细粉碎过程中得到了保护。 相似文献
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《中国稀土信息(英文版)》2014,(12)
正November 21~30,2014Due to weak demand from downstream industries,transactions of rare earth in Chinese domestic market were inactive.It was difficult to sell any rare earth products except for dysprosium oxide and terbium oxide.Suppliers lost confidence in recent market.Demand for rare earth products was soft.Consumers continued to take a wait-and-see attitude.Rare earth export market remained slow. 相似文献
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《中国稀土信息(英文版)》2014,(10)
<正>Developing ecological lighting source The world is facing the big problem of energy shortage today and the contradiction between economy development and environmental protection is worsened.Therefore,people are more likely to choose an ecological light source that is more energy efficient and environmental friendly.The choice provides great opportunity for the development of rare earth optical material industry in China.The concept of green lighting positions rare earth luminescent material as a leading player in illumination market.The light source of both rare earth luminescent lamp and LED lamp is ecological and energy saving.This is why 相似文献
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《中国稀土信息(英文版)》2014,(8)
正Galaxy Magnet announced its financial results for the first half of 2014 on August 14.For the first six months ended on 30 June 2014,Galaxy Magnet achieved operation income of RMB 182.3 million,up8.40% over the same period of 2013,and the net profit attributable to the shareholders of the listed company of 34.02 million yuan,increasing 35.49% over the same period of last year.Stable performance increase was led by development of new customers and application market of magnets. 相似文献
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<正>China has rich rare earth resources.Output of rare earth and steel in China ranks the top first in the world.However,there is still certain distance between the steel produced in China and developed countries from the point of varieties and quality.China still has to import some types of steel.Improving the quality should be emphasiZed in future development of steel industry in China.Rare earth can be used to upgrade traditional steel 相似文献
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分析了近年来国内外稀散金属产业的生产、应用、资源与市场状况.铟锡氧化物靶材、砷化镓晶片、锗红外材料、铼高温合金和硒在电解锰及玻璃的应用等已成为稀散金属的主要应用领域.稀散金属的产量快速增长达到历史高位而导致了市场的失衡.以GaInP_2/GaAs/Ge,CIGS和CdTe为代表的非硅系太阳能电池是稀散金属的新兴应用领域,将给稀散金属带来日益增长的需求. 相似文献
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《中国稀土信息(英文版)》2014,(11)
正November 1~10,2014Chinese rare earth market was still inactive.Demand for rare earth products was weak.Consumers took a wait-and-see attitude for lower price.As it was an off season for rare earth products,it was expected that prices of rare earth could continue turbulence at the bottom in short terms.Due to a sharp drop,demand for rare earth from downstream recovered.Affected by new energy vehicles,wind powder and energy-efficient appliances,production of rare earth permanent 相似文献
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《中国稀土信息(英文版)》2014,(8)
正August 1~10,2014 There was some good news in rare earth industry recently.Restructuring plans of rare earth groups led by Baotou IronSteel Group and Xiamen Tungsten Group respectively have been approved by MIIT.And rare earth storage policy,which had been expected for a very long time,has been launched officially.Pushed by the good news,rare earth price started to rebound since August 5.Price of didymium oxide and dysprosium oxide rose about 1% to 2%,averagely.About 10% of 相似文献
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《中国稀土信息(英文版)》2014,(7)
正July 1~10,2014Due to weak demand from downstream industry and slow transactions,rare earth market remained weak and price of rare earth products continued to decline.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst, 相似文献
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Ye Peipei 《中国稀土信息(英文版)》2014,(7)
<正>Extracted from Securities Guide 1.Popularity of new energy vehicles—an irresistible market trend1.1 Progress of new energy vehicles Chinese Premier Li Keqiang said recently on a visit to Xi'an BYD Autos that new energy vehicles,especially new energy bus,can lessen environment and noise pollution.He encouraged the use of new 相似文献
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《中国稀土信息(英文版)》2014,(7)
正Corun invested another 50 million yuan in power battery for HEV Hunan Corun announced on 27 June that they had signed the cooperation agreement to jointly built Corun(Shaoxing)Autos Power Battery System Co.,Ltd.in Shaoxing Binhai New City.According to the announcement,total registered 相似文献