查询词典 titanium oxide

Preparation of the cathode includes:shaping under the press of 40Mpa, sintering at 550℃for 1 hour and at 900℃for 8 hours and threading with molybdenum bar; Considering the literatures we choose CaCl2 as salt for preparation titanium. Pretreatment of salt is for 1 hour at 100℃and for 2 hours at 300℃. Partial pressure of oxygen which need lower than 5.11×10-7Pa to reduct titanium oxides and hygroscopic property of salt need a sealed equipment to electrolyse. And finally successfully designed a satisfied one and the results show that the equipment can be satisfied the requirment of the experiment. Flow of the inert gas is 1.5L/min, the voltage is 2.8 V, temperature is 850℃and time is 2 hours during pre-electrolysis. Flow of the inert gas is 0.2L/min, the voltage is 3.1 V, temperature is 900℃and time changes with the mass of TiO2 during electrolysis, namely the greater need the longer time; To eliminate influence of salt and other impurities, the products need to wash with distilled water and dilute chlorhydric acid , then wash with dilute hydrochloric acid under supersonic wave assistant. Finally, electrometical properties of the electrolysis of TiO2 is researched by cyclic voltammetry and chronoamperometry, and results show that there are two main reodox steps, namely from TiO2 to TiO and from TiO to Ti.

阴极制备主要包括40MPa压力下模压成型、两段式烧结(1小时内升至550℃保温1小时，再1小时升温至900℃保温8小时)及烧结后TiO2块打孔用钼棒串接三个主要环节；实验中选用CaCl2作为电解熔盐，并对其进行预处理(100℃，保温1小时； 300℃，保温2小时)；经热力学计算，还原钛氧化物的氧分压至少要低于5.11×10-7Pa，结合电解过程中所用熔盐CaCl2有极强的吸水性的特点，电解装置应有较高的密封性，自行设计了一套密封性可靠的电解装置，便于实验过程中熔盐预处理和氧分压的控制；通过干燥处理预电解过程中Ar流量大约为1.5L/min、电压为2.8 V、温度为850℃、时间为2小时，电解过程中Ar流量大约为0.2L/min、电压为3.1V、温度为900℃，实验结果表明电解时间与TiO2质量密切相关，质量越大需要电解的时间越长；通过自来水冲洗—稀盐酸浸泡、洗涤—在超声波辅助作用下稀盐酸洗涤，可减少熔盐及其它杂质对电解产物检测结果的影响；最后，通过循环伏安法、计时电流法对电解机理的研究，确定电解还原TiO2制备金属钛主要经历了TiO2-TiO-Ti的过程。

Nickel-titanium shape memory alloy composed of near equiatomic components of nickel and titanium is cha...

由近等原子比组成的NiTi形状记忆合金具有独特的性能：形状记忆效应和超弹性。

Titanium ethoxide was directly prepared using titanium as sacrificial anode in absolute ethanol.

采用海绵钛为&牺牲&阳极，在无隔膜电解槽中，电化学一步法制备了纳米TiO2 前驱体钛酸乙酯Ti 4 。

The hydrogen precipitation of different metals, platinum, lead, nickel, iron and titanium, were discussed in different pH value and current density. By using Cyclic Voltammetry to study the reduction reaction, copper, titanium, lead, Ti/PbO2 and Ti/MnO2 as cathode respectively, it is proved that sodium metaborate can be electrochemically reduced to sodium borohydride. The kinetic parameters and fractal dimension of these electrode, graphite, lead iron Ti/PbO2 and Ti/MnOa etc, will be researched.

采用循环伏安法，分别以铜、钛、铅、钛、Ti／PbO_2和Ti／MnO_2作为阴极，对该反应进行实验研究，证实了偏硼酸钠电化学还原制各硼氢化钠的可能性；分别对石墨、铅、铁、Ti／PbO_2和Ti／MnO_2等电极在本实验体系中的电极动力学参数(a，b，i_0)及分形维数进行了讨论，认为Ti／PbO_2为该体系中的最佳电极材太原理工大学硕士研究生学位论文料。

Metatitanic acid as precursor, titanium dioxide loading silver grain was prepared by dipping into a stated concentrated silver nitrate solution and using heated-deposition on the surface of the titanium dioxide.

以偏钛酸为前驱体，浸渍一定浓度的硝酸银溶液，用热沉积法制备出载银二氧化钛。

After titanium was phosphated with H_3PO_4 and TEP, the elements of P, C, 0, Ti and the radicles of P-O-C,-PO_3,-PO_4 were detected by X-ray photoelectron spectroscopy and the Fourier transformed infrared spectroscopy. It presents that the phosphorus had been bonded onto the titanium surface with chemical combination.

纯钛表面经过磷化处理，通过X光电子能谱和红外光谱分析可知，表面分别检测到了P、O、C、Ti元素和P-O-C、-PO_3、-PO_4等原子团，说明磷化处理可以有效的使磷元素以化学键合的方式引入表面。

The aluminium powder has been used to reduce titanium tetrachloride to generate the low valent titanium reagent which can induce the reductive coupling of aldehydes and ketones to form the corresponding pinacol s.

以价廉易得的铝粉还原四氯化钛制得低价钛，将其用于醛酮还原偶联，合成了6种片呐醇，其中对称片呐醇4种，不对称片呐醇2种。

The principle and producing situation of three production methods of titanium concentrates—— Reduction smelting produces titaniferous slag,Acid leaching and Reductive leaching produce synthetic rutile are depicted;According to different production methods of titanium concentrates,the differences are summarize.

简述了工业上制备富钛料常用的几种方法--电炉熔炼法生产钛渣、盐酸浸出法、硫酸浸出法、还原锈蚀法生产人造金红石的原理、国内外生产状况。

Panzhihua v-bearing titanomagnetite has a titanium recovery of only 7% when smelted by traditional process,an enormous waste of titanium resource.

攀枝花钒钛磁铁矿使用传统工艺流程冶炼，钛资源的回收只有7%，浪费巨大。

A method of increasing the lifetime of a hydro-oxidation catalyst comprising, preferably, gold, silver, or mixtures thereof, and optionally one or more promoters, on a titanium-containing support, such as a titanosilicate or titanium dispersed on silica.

一种延长加氢-氧化催化剂寿命期的方法，该催化剂在比如硅钛酸盐或分散在氧化硅上的钛的上面优选含有金、银或它们的混合物，以及任选的一种或几种促进剂。

The small blue capacitor has very high chances to go fully shorted compare to electrolytic capacitor which is very rare.

小蓝电容器具有很高的机会去充分地缩短了比较电解电容器，这是非常罕见的。

In the Italian campaigns of 1513 and 1515, when the Swiss won the victories of Novara and Marignan, he acted as army chaplain.

在意大利的运动， 1513年和1515年，当瑞士赢得了胜利，诺瓦拉和marignan ，他担任军队的牧师。