查询词典 titanium dioxide

The results of research on the factors affecting titanium tannage show that high concentration NaCl medium has larger negative effect on titanium tannage. When the NaCl concentration exceeds 5%, the titanium tanning action is reduced rapiddly. Traditional NaCl pickling is unsuitable for titanium tannage, tanning in water medium directly, the best tanning effect can be obtained, so titanium tanning can not only eliminate chrome pollution, but also diminish salt pollution. The optimum tanning conditions for HPZ-Ti tan liquor are pH3. 5, TiO〓 offer of 7. 5%(based on the weight of 65% moisture pelt), the best Bascity of tan liquor is between 30% and 50%.

以HPZ—Ti鞣液为基础，研究了不同鞣制介质，鞣制pH值，鞣剂用量和浓度，鞣液的碱度，不同提碱剂，不同的预处理和后处理等因素对钛鞣的影响，结果表明：高浓度的NaCl溶液介质对钛鞣有很大的负面作用，当介质NaCl浓度超过5%，革内钛的结合量和革的Ts明显降低，传统的高浓度NaCl浸酸工艺不适合于钛鞣，在水介质中直接鞣制效果最好，所以钛鞣不仅消除了铬污染而且大大降低了盐的污染。

Because there are many kinds of matrixes in titanium matrix composite, we select some typical ones as investigated subject in many titanium alloys or titanium aluminide intermetallics, and then simulate the distribution of thermal residual stresses under the appropriate composites fabrication and heat treatment parameter. We not only hope to seek better titanium matrix, but also discover the relationship between the material properties and the thermal residual stresses, and then provide some theoretical guidance for the selection of the matrix in titanium matrix composites.

鉴于当前钛基复合材料中钛基体的多样性，我们将在各种类型的钛合金和钛铝金属间化合物中，挑选出较为典型的作为研究对象，利用本文得到的较为理想的复合材料加工和热处理工艺参数，逐一模拟它们的残余热应力，找到残余热应力分布较为理想的钛基体，并且，希望能够寻找到材料性能与热残余应力的相互关系，为钛基复合材料基体的选择提供一定的理论指导。

The key was elaborated strengthen research of technology of titanium white aftertreatment, promote product of vitriolic law titanium white energetically high-grade change, accelerate research of technology of chloridize law titanium white and industrialization process, the aspect that alters high-grade titanium white to count an import gradually and accelerate metallic titanium to grow pace, conform with international person of the same trade as soon as possible wait for a viewpoint.

重点阐述了加强钛白后处理技术研究，大力促进硫酸法钛白产品高档化，并加快氯化法钛白技术研究和产业化进程，逐渐改变高档钛白依赖进口的局面以及加快金属钛发展步伐，尽快与国际同行接轨等观点。

Objective:To evaluate the application of titanium plate and titanium mesh in multi-segmental cervical spondylotic myelopathy anterior fixation.Methods:Twenty-five patients of multi-segmental cervical spondylotic myelopathy were treated with anterior cervical corectomy and fixation with titanium plate and titanium mesh from 1998 to 2002.Results:All the twenty-five patients of bone planted were in fusion.Titanium mesh shedding,screw loose,plate breaking were not found after follow-up for an average of twelve months.The function of nerve had been improved.

中文摘要：目的：探讨前路钛钢板加钛网植骨内固定治疗多节段脊髓型颈椎病的效果及意义，方法：总结1998年至2002年期间收治的25例有2-3个节段突出的脊随型颈椎病行前路椎体次全切术前路钛钢板加钛网植骨内固定术，结果：经平均12个月的随访，25例患者植骨全部融合，无钛网移位脱落，无螺钉松动，钢板断裂，神经功能得到了不同程度恢复。

Through designing of composition and structure of the bioactive graded coating,innerstress and its distribution in the coating were analyzed and calculated, the resultsshowed that when composition distribution coefficient n was 1.5, a reasonable stressdistribution could be got, that was at the beginning of deposition the suspension containingrichly BG granules was used so that a rich BG granules layer, a good transitional layerbetween BG layer at the bottom and the coating could be obtained at the titanium alloy side,the bottom of the coating; the stress value near the interface and surface and its character,pressure stress or tensile stress, were decided by the character of its composition itself.Changing composition distribution coefficient n could only change the variation tendency ofstress in the coating, but did not change the stress distribution rule in the coating. Thethinner the coating is, the sharper stress variation in the coating is, which does not mean thatthicker coating is better because the thicker the coating is, the little the permitteddeformation of coating is, so the coating thickness should be thinner, for example, about50μm for bending applications, but for applications only bearing pure shear stress, such asroot of tooth implant, the coating can be thicker little, for instance, about 80～100μm. The study on electrification characteristic and electrophoresis deposition of HAand BG granules in aqueous and non-aqueous solution system found that EPD almost didn'toccur in aqueous solution system. However, because HA granules take position charges inabsolute alcohol, a homogeneous EPD be carried out on the cathode titanium alloy slice, but taking negative charge in absolute alcohol the BG granules not be deposited on the cathode. A guided HA crystallizing, 100～300nm, on surface of the BG granules be realized by metathetical reaction, which cover BG granules with HA microcrystals and make the covered BG granules taking position charges in absolute alcohol, sequentially realize the EPCD of the BG and HA granules on the cathode, so it is feasible to make a titanium alloy/BG/HA bioactive graded coating by making use of EPCD technology. The corrosion experiment of rich boron bioglass coating and plasma spray coating showed that split phase, rich boron and rich silicon phase, occurred during its preparation. In basic medium the corrosion behavior of 〓 BG coating showed uniformity corrosion, the corrosion mostly occurred at rich boron phase area, therefore batch formula design of BGshould avoid the occurring of split phase. The corrosion appearance of plasma spray coatingappeared a non-uniform corrosion, mostly occurred at the edge of the laminated HA moltendrops, and emerged an accelerated corrosion tendency, which will easyly lead to corrosioncrackles extending to the interface and the happening of osmotic interfacial corrosion, thatmay be one of the major reasons leading to the coating cracking-off in the later period. Thetesting results of thermal expansion coefficient of 〓 and 〓BG showed the thermalexpansion coefficient of 〓 BG matched with that of titanium alloy better, and 〓 BG couldsinter with titanium alloy into densification enamel layer at low temperature (720℃).

将Ti6Al4V合金在1000℃下进行真空热处理会降低其力学性能，且合金内的V元素会向表面富集，因此，钛合金真空热处理和表面涂层的烧结温度不能过高，即应低于其相转变点；通过对生物活性梯度涂层的组成和结构的设计，分析和计算了梯度涂层内的应力大小和分布，结果表明：对于本研究，当成分分布系数n=1.5时，可以获得较合理的涂层力学性能，即在沉积开始时，采用富含BG颗粒的悬浮液，以便在钛合金侧获得同底层BG有良好过渡的富BG涂层；梯度涂层界面和表面的应力大小、性质由材料组成本身的性质决定，改变成分分布系数，只能改变涂层内应力变化的趋势；涂层的厚薄不影响涂层内的应力分布规律，但涂层越薄，涂层内的应力变化越快，但这并不意味着涂层越厚越好，因为涂层越厚，涂层允许的变形越小，对于应用于弯曲受力部位的涂层而言，涂层应薄一点为好(50μm)；而对于仅纯受剪切应力的部位，如牙根种植体，涂层可适当加厚(80～100μm)；通过对HA和BG颗粒在水溶液体系和非水溶液体系中的带电特性和电泳沉积的研究发现，它们在水溶液体系中很难发生电沉积；在无水乙醇溶液中，HA颗粒带正电，可在阴极钛合金片上发生均匀的电泳沉积，而BG颗粒则带负电荷；利用复分解反应法，可以制得100～300nm的HA，通过诱导HA在BG颗粒表面结晶，可对BG颗粒进行表面包覆，获得了被HA包覆的BG颗粒，改变了BG颗粒表面的带电特性，使BG和HA颗粒在无水乙醇中均带上正电荷，从而实现了HA和BG颗粒在阴极上的共沉积。

It is possible to produce low-titanium aluminum alloy directly. Three months of periods of industrial test for production low-titanium aluminum alloy was conducted using the 80kA prebake electrolysis cells. The test results showed that the electrolysis cell can work stably, and the effect of TiO2 added into electrolyte on electrolytic process parameters, current efficiency, consumes of materials and energyare trifling. The titanium content in alloys is stable and the absorbility of Ti is high. The microstructure of electrolytic low-titanium aluminum alloy is homogeneous. The grain refinement effect is excellent comparing with that of alloys added titanium by melting Al-Ti master alloys and both alloys have the same grain refinement trend.

在80KA中型预焙电解槽上进行了为期三个月的低钛铝合金的工业试验，结果表明，电解槽工作状态稳定，TiO_2的加入对电解槽的主要工艺参数、电流效率、物料和能源消耗影响不大，合金的钛含量稳定，钛的吸收率高；所生产的电解低钛铝基合金的微观组织均匀，晶粒细化效果好，与熔配加钛的细化规律相同。

Titanium incorporated mesoporous molecular sieves Ti-MCM-41, Ti-HMS, and Ti-MSU were synthesized through S〓I〓, S〓I〓, and N〓I〓 pathways using cetylpyridium bromide, tetredecylamine, and polyoxyethylene (10) stearyl ether as the structure-directing agents, respectively. The framework structure and the titanium coordination environment of these materials were characterized by XRD, N〓 adsorption/desorption, TG, TEM, FT-1R, DR UV-Vis, and ICP-AES. It was confirmed that the titanium was highly dispersed in the silica-based framework positions, and all samples were free of extra framework titanium impurities. The catalytic performance of these titanium containing mesoporous materials was investigated in the oxidation of styrene with aqueous H〓O〓 as the oxidant.

以TEOS和TBOT为硅源和钛源，分别以溴代十六烷基吡啶、十四胺和十八烷基聚氧乙烯基醚为模板剂，通过S〓I〓、S〓I〓和N〓I〓方式合成了含钛的介孔分子筛Ti-MCM-41、Ti-HMS和Ti-MSU，用XRD、N〓吸附/脱附、TEM、FT-IR、DR UV-Vis和ICP-AES等方法对它们的骨架结构、孔道结构以及钛原子的存在方式等进行了系统表征，结果表明钛原子以高分散的形式存在于以SiO〓为基本单元的介孔分子筛的骨架结构中，制备过程中未形成聚集态的骨架外金属氧化物物种。

The surface state and electrochemistry properly platinum-plated on open-cell foamed titanium electrode was investigated and he compared with IrTi anode and platinum-plated titanium toil cathode. The results show that open-cell foamed titanium can uniformly coat with excellent bonding strength platinum-plated, thickness coating 2 μm. The cathode release hydrogen voltage of platinum-plated on open-cell loamed titanium electrode is fall. The anode release oxygen voltage of platinum-plated on open-cell foamed titanium electrode is higher than Irli anode in high current.

采用电镀技术在多孔钛表面沉积了均匀的铂金属层，分析了多孔钛镀铂后的表面状态及电化学性能，并与IrTi涂层阳极及镀铂钛网阴极进行比较，结果显示：多孔钛板开孔孔隙表面可均匀沉积结合力良好的铂层，镀层厚度为2μm；镀铂多孔钛阴极析氢电位比镀铂钛网高，且在大电流下，阳极析氧电位比IrTi涂层阳极高。

Clover pump, butterfly pump, stainless steel volume pump, 10000 pump with the delivery, milk uniform machines, screw, titanium dioxide slurry pumps, single - thick screw pump, pneumatic slurry pumps (leather spray pump, beating pump, insert barrel pumps, pump thick), high-shear dispersion emulsion pump, solid-liquid mixing pump, titanium dioxide slurry pump, high pressure are quality pumps, beverage pump, plate heat exchangers, a variety of filtration equipment, wash tank ball, cleaning spinning ball, automatic spray the ball and sanitation level clamp, live joints, valves, pipe fittings, products, services, covering industry, agriculture, transportation, energy, construction, light industry, automobile, shipbuilding, mining, metallurgy, ceramics, Titanium, Key Laboratory of universities and scientific research institutes, aerospace and other areas of national economy, an important industry for more than 140 countries and regions in the world to provide specialized service.

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With determining and comparing the result of the output of chlorine dioxide, the purity of chlorine dioxide, the rate of chlorine dioxide, the capacity of active chlorine and the output of chlorine generated by positive pressure type chlorine dioxide generator under different pressure, this paper draws the conclusion that the effect of pressure to aerogenesis efficiency of chlorine dioxide generator is indistinctive when the pressure is in the range of 0～0.6M Pa.

从化学平衡角度分析，压力增加会抑制正向反应的进行。为了验证实际效果是否如此，本文通过在不同压力下对正压式反应器 ClO2产量、纯度、得率及总有效氯产量等指标进行测定与比较得出，在 0～0.6M Pa的常用压力下，压力的变化对二氧化氯发生器的产气效率无显著影响。

There are different types of personal loans available.

有许多不同类型的个人贷款优惠。

The above mentioned teaching model of spiral rising can be used to avoid rigidness in teaching.

上述螺旋式上升的教学模式，可以避免教学形成模式後的僵化现象。