9943Tc which the density of 11, 487 grams cm 3, melting point FE20 ℃, boiling point 4973 ℃, the external electronic structure 4d5s2, chemical reaction time 1-7 electrons will be lost, so oxidation number of 0, 1, 2, 3, 4, 5, 6 and 7, more stable oxidation state of 4 and 7 prices prices, low oxidation state mainly exists in complex or electrochemical reduction process, the Tc in the low oxidation state with the manganese is very similar to the high oxidation state with the rhenium is very similar.
其中9943Tc的密度为11487克厘米3，熔点FE20℃，沸点4973℃，外围电子结构4d5s2，化学反应时1—7个电子会丢失，所以氧化数为0、＋1、＋2、＋3、＋4、＋5、＋6和＋7，较稳定的氧化态为＋4价和＋7价，低氧化态主要存在于络合物或电还原过程中，锝在低氧化态时与锰很相似，而高氧化态时与铼很相似。
The results indicate the membrane prepared in pure water coagulation bath exhibits fingerlike structure, with an increase of the volume fraction of ethanol in coagulation bath leads to a reduction of fingerlike cavities, and in ethanol/water coagulation bath of φ=40% exhibits spongelike structure; the melting points of the fingerlike and spongelike membrane increase by 3.9℃ and 3.5℃ compared to that of raw material respectively, and the crystallinity of the two type membranes increases by 16.1% and 13.5% respectively.
结果表明纯水凝胶浴中所成膜为指状多孔膜，随着凝胶浴乙醇体积分数的增加，膜指状大孔逐渐消失，在φ=40%的乙醇／水凝胶浴中转变为海绵状多孔膜；指状多孔膜和海绵状多孔膜熔点相对于原料分别提高了3.9℃和3.5℃，而结晶度相对于原料分别提高了16.1%和13.5%。
Thereafter, the method comprises completely reducing the metal oxides and melting the metal in a smelt reduction stage.
其后，该工艺还包括在熔炼还原阶段使金属氧化物全部还原以及使金属熔融。
In this article, the electric resistance furnace is used to heat the carbon cathode, anode and ramming paste samples of aluminum reduction cell, the temperature regulator used to regulate heating-up of the electric resistance furnace and high temperature mixed fume is inlet into melting chamber as oxidizing atmosphere.
本文利用电阻炉来加热铝电解槽的碳阴极、阳极以及扎固糊试样，使用温度控制器来控制电阻炉的升温，用高温烟气通入炉膛内作为氧化气氛。
Melting point 1541 ℃, boiling point 2831 ℃, the relative density of 2989, the external electronic structure 3d14s2, chemical reactions are easy when the three E F lost, then the oxidation number of 3, soluble in dilute acid, it oxide Sc2O2 easily dissolved in acid to generate the corresponding salt, carbon reduction to be carbonized scandium scandium oxide, and other compounds have ScCl3, Sc2S2, scandium sulfate salt, nitrate salts and phosphoric acid scandium scandium salt, scandium salts heated to decomposition, scandium can be used to create a high photosynthetic efficiency of the scandium halogen lamps, industrial extracting scandium extraction method can also be used.
熔点1541℃，沸点2831℃，相对密度2989，外围电子结构3d14s2，化学反应时三个电子都易F丢失，则氧化数为＋3，易溶于稀酸中，它的氧化物Sc2O2很容易溶解在酸中生成相应的盐，碳还原氧化钪得到碳化钪、其它化合物有ScCl3，Sc2S2，硫酸钪盐，硝酸钪盐及磷酸钪盐等，钪的盐类加热就分解，钪可用来制造高光效的钪卤素灯，工业提取钪也可用萃取分离法。
Two brittle regions, from melting point to 1330℃ and from 950℃ to 600℃ existed during deformation of hull structural steel microalloyed with Nb or Ti at the strain rate from 5×10〓/s to 5×10〓/s. At the temperatures from 850℃ to 750℃, the reduction in area reached the minimum.
含Nb、Ti船板钢在应变速率为5×10〓/s至5×10〓/s范围内主要存在两个脆性区，温度范围分别为熔点～1330℃和950～600℃；当温度在850～750℃范围内时，钢的断面收缩率降到最低。
Behaviour of Reduction, Melting and Separation in Ore/Coal Composite Pellets
含碳球团的还原熔分行为，徐萌；赵志星；张建良；孔令坛；万天骥-66文免费论文库，大学生论文库
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To heat to a high temperature but below the melting or fusing point, causing loss of moisture, reduction, or oxidation and the decomposition of carbonates and other compounds.
锻烧加热至一低于熔点或融点的高温，引起水气遗失、变形或氧化以及钙化物和其它化合物的分解
Finnish chemist, discovered in 1794 Gadolin yttrium, melting point 152 ℃, boiling point 38 ℃, density of 607 grams cm 3, the external electronic structure of 4d15s2, reaction time 3 FE electrons are easily lost, so oxidation number of 3, save in the air can be rapidly oxidized, and its sulfate, nitrate or oxalate can be a white ash heated Yttrium oxide, Y2O3 can absorb ammonia in the air, yttria dissolved in acid to get a different salt of the corresponding compound with carbon, chloride, yttrium alloy is widely used in laser materials, microwave technology and nuclear industry, technology, industrial silver is available on the Y Preparation of yttrium fluoride reduction.
芬兰化学家加多林在1794年发现钇，熔点152℃，沸点38℃，密度607克厘米3，外围电子结构4d15s2，反应时三FE个电子都易丢失，所以氧化数为＋3，在空气中保存时可被迅速氧化，它的硫酸盐、硝酸盐或草酸盐加热都能得到白色灰末氧化钇，Y2O3能吸收空气中的氨，氧化钇溶解在酸中能得到不同的相应的盐，化合物有碳化物、氯化物，钇的合金广泛用于激光材料、微波技术和核工业技术，工业上钇可用银还原钇的氟化物制取。
Reduction of silicon oxide in the acid lining into silicon by some alloy elements and melting into the alloys during the melting process.
二是酸性炉衬中的SiO2被合金中的某些元素还原出来进入合金。
But in China, acid pellets have the problem of high reduction swelling and low softening melting temperature.
但当前我国生产的普通酸性球团矿普遍存在还原膨胀率高、软熔温度低等不足。
The decrease of the burning rate and flame temperature by adding energetic additive PQ is due to the reduction of energy level of the propellant and the decrease of the chemical reaction rate by the endothermic melting of PQ.
含能添加剂PQ降低燃速、燃温的原因是加入PQ后，推进剂的能量水平下降以及PQ在分解时的熔化吸热降低了化学反应速率。
Electrolysis with a low-melting cryolite bath containing 20% aluminium fluoride and 3% lithium fluoride showed that the current efficiency could be improved by reduction of temperature.
在实验室铝电解槽上使用低熔点电解质（20%氟化铝，3%氟化锂，4%氟化钙和4%Al2O3）电解测定电流效率。
COREX ironmaking means that conventional ironmaking system with blast furnace, coke oven and sintering circuit is replaced by melting reduction ironmaking with non-coking coal and oxygen.
COREX是用非炼焦煤与氧气的熔融还原炼铁法，取代传统的高炉、焦炉、烧结组成的炼铁系统。
It briefly introduces reduction of tin dioxide, reduction of associated metallic oxide in the reduction melting process of barilla and the activity of tin-iron in reduction smelting process.
简要介绍了锡精矿在还原熔炼中二氧化锡的还原、伴生金属氧化物的还原以及锡铁在还原熔炼实际过程中的行为。
According to basic principles of the melting reduction process, a treatment of low-grade zinc oxide ores is investigated.
利用熔融还原法的基本原理，对低品位氧化锌矿的处理进行研究；
The results indicated that PET fibers after exposure to UV-radiation exhibited a marked reduction in molecular weight and tensile strength, noticeable decline in glass-transition temperature and melting temperature, but an increase in crystallinity.
研究结果表明，紫外线辐射后聚酯纤维样品的分子量、强伸度大幅度下降，结晶度有所提高，玻璃化温度、熔点均有所降低。
The silver in leaching solution can be recovered by reduction with sodium borohydride and purified by melting at high temperature to (99.78%) of purity. The recovery rate of silver is 96.88%. The leaching solution is reusable.
浸取液中的银采用硼氢化钠还原回收，粗银粉配以熔剂高温熔炼可得到纯度达99.78%的银，银回收率达96.88%，回收银后的浸取液可循环使用。
The influence of reducing gas composition on the reducibility of iron ore and metalization rate in-COREX melting-reduction process is presented on the basis of the result of experiments, and the oxygen concentration in this process is discussed as well.
本文根据试验研究结果，阐述了COREX熔融还原工艺中还原气体成分对铁矿石还原度及金属化率的影响，还就该工艺中氧气浓度的问题进行了讨论。