石墨

Cyclic voltammetry indicated that there were Cr→Cr, Cr →Cr oxidation reaction on anode, while there were Cr→Cr, Cr→Cr, Cr →Cr deoxidization reaction on cathode. The graphite electrodes treated by acid and heating could enhance the reversibility and kinetic of the electrode reaction. The nature graphite electrodes had been eroded during charge/discharge process, while the graphite electrodes by activation could avoide corroding by hexad chromium ion. The reversibility and kinetic of the electrode reaction of chromium ion on activation electrode had been increased, so which indicated that graphite surface augment oxygenous function corps which could increase electrode hydrophile capability.

循环伏安实验表明：铬液流电池的电极反应非常复杂，在阳极存在Cr→Cr，Cr→Cr的氧化反应，在阴极存在Cr→Cr，Cr→Cr，Cr→Cr的还原反应；热处理的石墨电极和重铬酸钾处理的石墨电极能提高电极反应的活性和可逆性；在充放电实验中未处理的石墨电极发生严重腐蚀；分别用这两种方法处理过的石墨电极具有防止六价铬侵蚀的功能；铬离子在活化处理过的石墨电极上的反应活性和可逆性增加，可以认为：重铬酸钾溶液活化处理和加热处理后的石墨表面的含氧官能团增加，电极亲水性增强。

Because of the nondirectional property of ionic bond and the fully delocalized property of pi electrons on carbon layers, translation will not change the electronic structure of carbon layers, resulting in that A-GIC and AE-GIC hare quite good lubrication as well. The electrons come from metals mainly transfer to the delocalized pi orbitals of carbon layers, and the increase of delocalized electrons will make metal graphite intercalation compound more electro-conductive than graphite itself. Because ionic bond between metals and carbon layers is weaker and its lattice energy is much less than that of typical NaCl crystal, so metals could be left from interlayers. The Mulliken populations of C-C in intercalation compounds are smaller than that of graphite, and the HOMO energy level of GIC is higher than that of graphite too. These Lead to that GIC will easier be oxidized.

由于离子键没有方向性，又由于碳层中的π电子是充分离域的，所以碳层不会由于平移而改变其电子结构，金属石墨层间化合物仍具有很好的润滑性；金属失去的电子主要转移到碳层的离域π轨道中，碳层离域电子增多使金属石墨层间化合物的导电性比石墨增强；金属与碳层间的离子键强度比较弱，其晶格能远小于典型的离子晶体，因而金属易从石墨层中脱出；金属石墨层间化合物中的C-C间Mulliken布居值小于石墨中C-C间的值，且金属石墨层间化合物的HOMO能级也高于石墨的HOMO能级，所以石墨层间化合物中的碳原子较石墨更易被氧化。

Company produces the "Tianfu card" graphite crucible, from 0.5 #-2000 #, model specifications, and supporting the production of graphite core reverberatory furnace crucible, graphite ring, graphite plate, and in accordance with the requirements of users profiled the production of graphite products .

公司生产的"天府牌"石墨坩埚，从0.5#-2000#，型号规格齐全，并配套生产石墨坩埚反射炉芯，石墨环，石墨盖板，并可根据用户的要求生产石墨异型制品。

The device comprises an arc discharge vacuum chamber; wherein, the arc discharge vacuum chamber is connected with a vacuum pump and is internally provided with a graphite cathode and a graphite anode which are connected with a DC supply. The device is characterized in that the graphite cathode and the graphite anode are respectively provided with an upper spherical crown shape graphite plate and a lower spherical crown shape graphite plate which are matched with each other and formed a spherical crown shape capacitor.

它包括电弧放电真空室，电弧放电真空室与真空泵相连接，电弧放电真空室内设有石墨阴极和石墨阳极，石墨阴极和石墨阳极与直流电源相连接，其特征在于在石墨阴极和石墨阳极上分别设相配合的上球冠形石墨板和下球冠形石墨板，上球冠形石墨板和下球冠形石墨板形成球冠型电容器。

The hydrogen chloride producing design needed the whole optimization design-aside of two-appulse-one hydrogen chloride graphite synthetic furnace system. With the analysis on the relation of different types of chillers and the productive forces, the YKB round pass graphite chiller, endwise wing drivepipe graphite cooling pipe and equipment design methods for graphite chiller modality were adopted.

氯化氢生产设计中缺少对二合一氯化氢石墨合成炉系统的整体优化设置，通过冷却器形式和系统生产能力的关系研究，确定石墨冷却器采用YKB型圆块孔式石墨冷却器，石墨冷却管采用纵向翅片管型套管式石墨冷却管。

Our company can provide various analytical aas graphite furnace, various graphite cone, graphite tube, graphite platform, graphite crucible for gas analysis, graphite gleithretter, graphite sinter pole, heterotype graphite mould, graphite crystallizer, oil free bearing, thermocouple graphite protecting jacket, graphite obturating ring.

我公司可以向国内外用户提供各种分析仪器原子吸收石墨炉，各种型号石墨锥、石墨管、石墨平台；各型号气体分析仪器石墨坩埚、各尺寸石墨滑片、石墨烧结棒、异型石墨模具、石墨结晶器、无油石墨轴承、各型号热电耦石墨保护套、石墨密封圈。也可以来图带料加工。

Our company can provide various analytical AAS graphite furnace, various graphite cone, graphite tube, graphite platform, graphite crucible for gas analysis, graphite gleithretter, graphite sinter pole, heterotype graphite mould, graphite crystallizer, oil free bearing, thermocouple graphite protecting jacket, graphite obturating ring.

我公司可以向国内外用户提供各种分析仪器原子吸收石墨炉，各种型号石墨锥、石墨管、石墨平台；各型号气体分析仪器石墨坩埚、各尺寸石墨滑片、石墨烧结棒、异型石墨模具、石墨结晶器、无油石墨轴承、各型号热电耦石墨保护套、石墨密封圈。

The electrolyte volatilizes and condenses in the aperture in anode, then partly hydrolyzes and dewater, then the stress are produced by expansion in this process. The expansion stress is the dominant cause of the graphite anode damage, and the oxidation of the active graphite particles on the anode surface is subsidiary for the anode damage. The measures of prolonging the anode service life are to enhance the quality of the anode such as increasing the forming pressure in the preparation and surface treatment before application.

认为石墨阳极的破损主要是由于石墨阳极中有比较多的孔隙，其中挥发进入石墨阳极表面孔隙的电解质吸水水解、脱水等过程发生膨胀，使周围的石墨颗粒应力不平衡而发生破损；其次是由于石墨阳极孔隙中活性高的石墨颗粒氧化。

Products: graphite ring, graphite seal ring, graphite seals, graphite bearings, graphite crucible, graphite spherical ring, cylindrical graphite, graphite blades, flexible graphite, graphite ring rotary joint, sliding, bearing, friction block, piston rings, orientation ring, such as carbon plate.

产品：石墨密封圈，石墨密封环，石墨密封件，石墨轴承，石墨坩埚，石墨球面环，石墨圆柱，石墨叶片，柔性石墨，旋转接头石墨环，滑片，轴瓦，磨擦块，活塞环，导向环，碳板等。

With this method the copper plating graphite powder was made up in 50% copper content .The silver- copper plating graphite composite was prepared while the silver- copper-graphite composite and the silver-graphite composite were also made up together .The mechanical and electric characteristics of the three kinds of composites were tested and it was found that the copper plating graphite powder can only optimize the properties of the silver matrix composite under the high content of the graphite ,the conductivity and the mechanical property was improved and the material could take higher current in the same carbon content .At 20% carbon content, the resistivity of Ag-graphite composite was 1.67 times as high as that of silver- copper plating graphite composite, the resistivity of Ag-Cu-graphite composite was 3.23 times as high as that of silver- copper plating graphite composite. The bending strength of silver-copper plating graphite composite was 2.17 times as high as that of silver- copper-graphite composite, and the bending strength was 2.11 times as high as that of silver- copper-graphite composite. The wearability of silver- copper plating graphite composite was also enhanced greatly at high carbon content.

利用该方法制备了50%铜含量的镀铜石墨粉，然后进一步制备了一系列相同碳含量的银-石墨复合材料、银-铜-石墨复合材料、银-镀铜石墨复合材料，对三种材料的机械、电气性能进行了综合对比，发现在低碳含量时镀铜石墨粉不能改善复合材料的上述主要性能，而在中高碳含量时则能明显优化复合材料的整体性能，提高了复合材料的电导率，使复合材料在中高碳含量时既具有较高的耐磨性同时也能负载较大的电流，复合材料的机械性能也因镀铜石墨粉的加入而大幅提高，20%碳含量时，银-石墨复合材料的电阻率是银-镀铜石墨复合材料的1.67倍，银-铜-石墨复合材料的电阻率为银-镀铜石墨复合材料的3.23倍，银-镀铜石墨复合材料抗弯强度是银-铜-石墨复合材料的2.17倍，是银-石墨复合材料的2.11倍，同时，在实验给定的条件下，中高碳含量时银-镀铜石墨复合材料的机械磨损耐磨性和通电磨损耐磨性都得以显著提高，银-镀铜石墨复合材料在实验时的接触电压降也更为稳定。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。