查询词典 hydrogen bromide

At certain temperature and hydrogen flow rate, the weight changing of tungsten trioxide during the reduction was investigated by thermo balance, and the phase transformation analyzed by means of XRD.

在一定的温度和氢气流量条件下，用热分析天平精确测量WO3 还原反应过程中，不同时间的质量变化，并用X射线衍射分析进行物相鉴定，绘制纳米级WO3 (粒径≤ 5 0nm)的还原动力学曲线。

Melting point 3410 ℃, boiling point 560 ℃, relative density of 1935, F the external electronic structure of 5d46s2, in the chemical reaction time is very easy to lose 1-6 electronic, but also can get 1-2 electronic, so oxidation number of 0,± 1,± 2, 3, 4 , 5 and 6, with 6 price of the most stable compounds, such as WO3 does not dissolve in water, the air will form in the tungsten trioxide thin protective layer of tungsten, tungsten with fluorine at room temperature, chemical combination, red hot when there is no moisture and Bromine iodide together, red hot when you can and water reaction WO3, at room temperature reaction of tungsten with aqua regia, but the hot concentrated hydrochloric acid and sulfuric acid can only be played with its weak response, but molten nitrate, nitrite, too Hydrogen peroxide, sulfur steam, steam and other phosphorus can play intense reaction, high temperature can not be carbon, boron and silicon reaction of binary compounds, widely used in industrial tungsten steel and tungsten carbide, pure tungsten filament is used to the system, and X-ray tube Tube heating components, semiconductor components can be prepared tungsten silicide, tungsten industrial production is white or black tungsten ore tungsten ore refining.

熔点3410℃，沸点560℃，相对密度1935，F外围电子结构为5d46s2，在化学反应时很容易丢掉1—6个电子，也能得到1—2个电子，所以氧化数为0、±1、±2、＋3、＋4、＋5和＋6，以＋6价化合物最稳定，如WO3不溶于水，空气中的钨会形成薄层三氧化钨保护层，钨能与氟在室温下化合，红热并无潮气时能与溴、碘化合，红热时还能和水反应生成WO3，室温下钨可与王水反应，但热的浓盐酸和硫酸只能与其起微弱反应，但对熔融的硝酸盐、亚硝酸盐、过氧化氢、硫蒸汽、磷蒸汽等能起激烈反应，高温下不能与碳、硼和硅反应生成二元化合物，工业上广泛使用钨钢和碳化钨，纯钨用来制灯丝、电子管和X射线管的发热元件，硅化钨可制半导体元件，钨工业生产是将白钨矿石或黑钨矿石精炼。

Tungsten trioxide; oxidation-reduction method; ultrafine tungsten powder; hydrogen reduction; reduction kinetics

工程科技II，工业通用技术及设备，工业通用技术与设备三氧化钨；超细钨粉；氧化-还原法；氢还原；动力学

Two models were developed, one for calculating the leakage rate of water from heat transfer tubes due to one broken double ended guillotine tube in the steam generator of LMFBR using the one dimensional method of characteristics, and anotherone for temperature, adiabatic spherical to columnar hydrogen bubble growth model in large sodium water reaction.

采用一维特征线方法建立了快堆蒸汽发生器单管发生双端断裂情况下，水从破裂传热管流出的泄漏率计算模型和钠水反应气泡从球状到柱状的变温绝热生长模型。沸腾是钠冷快堆安全分析工作中必须要考虑的一个问题，而堵流是众多导致发生沸腾原因中十分重要的一个。

It can b e used in the processes for hydrogen, fertilizer and town coal gas production.

该催化剂具有优良的活性和选择性，可应用于制氢、化肥和城市煤气的生产过程中。

Internal friction peaks associated with the presence of hydrogen in eight types of high chromium-nickel alloy steel were observed in measurements with a torsion pendulum.

用扭摆作内耗测量，发现八种高铬镍合金钢中含氢可以引起内耗峰。

The results showed that functional nanometer ITO powders of 30-50nm size with dispersion performance can be prepared. The condition is that indium salt concentration is 88mmol/L, SnO2/In2O3 =5.3wt%, reaction solution PH value is 8, The precursor are thermally reduced at 450 ℃ under hydrogen gas ,at the sametime adding 6at.% KC1 salt to indium tin salts. Thus, satisfactory and stable dispersion of ITO particles in aqueous solution is obtained only through simple mechanical force.

KCl、反应铟盐浓度88mmol/L，掺杂比SnO_2/In_2O_3≈5.3wt%，维持PH值为8的反应条件下制备前驱体，前驱粉体在450℃，氢气气氛煅烧的条件下可生成功能性的具有很好分散性能的ITO粉末，粒径大小为30—50nm，此制备得到的粉体通过简单的机械分散可直接稳定的分散于水、醇介质，若通过分散剂处理后的分散体系可以稳定存在两个月以上。

The phase structure,hydrogen storage performance and electrochemical performance of the alloys were studied by XRD and three-electrode test system.

采用X射线衍射和三电极测试体系研究了合金的相结构、贮氢性能和电化学性能。

In a separate use or for the thick-walled tube welding, heat-resistant steel should use low hydrogen electrodes.

在单独使用或用于厚壁管焊接时，应选用低氢耐热钢焊条。

Now, research replaces the option of index in the various disease appraisement of curative effect to discuss , if with blood plasma 羟 hydrogen can appraise when ketone density is replacing index A flat kind ease pain medicine Kong Shi dose relieve pain effect , is taking ATT( aim at the antibody effect of tetanus toxin) as replacing index to appraise the immunity inhibition researchs of? single clone antibody 5c 8 of the CD 154 in monkey body to get better effect.

目前，已有研究就多种疾病疗效评价中替代指标的选择进行了探讨，如以血浆羟氢可待酮浓度作为替代指标评价阿片类镇痛药控释剂的止痛效果、以 ATT(针对破伤风毒素的抗体效应)作为替代指标评价猴体内 CD154的单克隆抗体5c 8的免疫抑制作用等研究都取得了较好的效果。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48