XRD 图谱表明，阴极材料结晶完整，为均一橄榄石型结构，仅含少量三价铁杂质。
XRD patterns showed that the cathode material is well-crystallized, homogeneous olivine-type phase, with only tiny trivalence iron impurities.
因为铝离子为正三价,氧为负二价。
Because aluminum ions have charge of plus three and oxygen ions have charge of minus two.
二价铁能还原成三价铁。
介绍了三价铬镀铬的主要优点与缺点。
The major advantages and disadvantages of trivalent chromium electroplating were introduced.
回顾了三价铬镀铬的历史。
The history of trivalent chromium electroplating was looked back.
三价铬电镀分为氯化物体系和硫酸盐体系。
Trivalent chromium plating can be divided into chloride and sulfate systems.
选用BH- 88硫酸盐三价铬镀铬工艺。
BH-88 trivalent chromium sulfate plating process was chosen.
在第二个反应器中，用三价铁离子溶液浸出矿石。
对三价铬电解液镀铬的沉积速度进行了实验研究。
The chromium deposition velocity of trivalent chromium electroplating was researched.
实现这一目的的一种方法是将三价阳离子加入水中。
One means of accomplishing this end is to add trivalent cations to the water.
在水处理中三价阳离子通常来源于明矾（硫酸铝） 。
The usual source of trivalent cations in water treatment is alum (aluminum sulfate).
然后还有，氮，负三价-,这些都是与氖原子等电子的。
Then also, nitrogen, 3 minus -- these are all going to be isoelectronic with neon.
还原生成的三价铬的量或未反应的重铬酸钾的量能被测出。
Either the amount of reduced chromium or the amount of unreacted dichromate can be measured.
三价铬及六价铬是食品中微量元素铬的两种主要存在价态。
Trivalent chromium and hexavalent chromium are two main states of the chromium in foods.
(化学)具有一个以上的化合价的，或具有三价或更高价的。
(Chemistry) having more than one valence or having a valence of 3 or higher.
(化学)具有一个以上的化合价的，或具有三价或更高价的。
(Chemistry) having more than one valence or having a valence of 3 or high er.
提出应用于三价铬钝化前的碱性无氰镀锌及酸性镀锌的适用场合。
The applicable fields of alkaline cyanide-free zinc plating and acidic zinc plating before trivalent chromium passivation were proposed.
三价铬经封闭钝化后，装饰效果、力学性能和抗腐蚀能力会有所提高。
By using tri-chrome passivation with top-coat, the decorating, mechanical performance and corrosion resistance will be all improved.
三价动词是指在动词基本语义结构中能够携带三个强制性语义成分的动词。
A trivalent verb should be a verb that can control three obligatory semantic elements in basic semantic structure.
这个分子包含四个呈环状排列的碳原子，每两个碳原子之间形成一个三价键。
The molecule contains four carbon atoms arranged in a ring with a triple bond between two of them.
引起极限扩散电流密度明显增加的临界磁场强度随三价铁离子浓度增加而减小。
The minimum magnetic field intensity needed to induce significant effect on cathodic limiting diffusion current density decreased with increasing ferric ion concentration.
不论对细胞DNA合成的促进作用还是抑制作用，三价砷比五价砷的作用更强。
The effects of stimulating or inhibiting of trivalent arsenic on DNA synthesis were always stronger than that of pentavalent arsenic.
一种比较近代的、人们好采用的技术是在混合过程中加入可溶性的三价锑衍生物。
One relatively recent technique which has found some favor involves the inclusion of soluble trivalent antimony derivatives in the slurry during mixing.
三价铬含量偏低时，根据计算加入适量草酸即可很方便地将其控制在最佳范围内。
The concentration of Cr(III)is easily controlled in optimal range by adding a proper amount of oxalic acid when Cr(III)content is low.
利用电化学方法分别研究了晶粒尺寸对纯锌及其表面三价铬钝化膜腐蚀行为的影响。
The effects of grain size on the electrochemical corrosion behaviors of zinc and trivalent chromium passivation film on zinc have been studied respectively by electrochemical methods.
六价铬电镀工艺存在严重的环境污染问题，利用三价铬镀铬取而代之已经迫在眉睫。
It's urgent to develop the technique of trivalent chromium plating because of the heavy pollution of hexavalent chromium plating.
采用直流和脉冲电沉积方式从三价铬的氯化物镀液中沉积出镍-铁-铬纳米合金镀层。
Nickel iron chromium alloy with nanocrystalline were electrodeposited from chloride bath containing trivalent chromium ions under direct and pulse current.
在酸碱性土壤中，磷主要以植物难以吸收利用的难溶性二价或三价阳离子的形式存在。
In acid and alkali soil, there are mainly indissoluble bivalent or trivalent phosphates, which cannot be utilized by plants.
三价钕离子是有效的发光中心，利用晶场分析，三价钕离子主要是处在锌的替代位置。
The efficient luminescence centres were found to be trivalent neodymium ions which, by a crystal field analysis, were shown to be located at zinc substitutional sites.
氧化剂的制造是将二价无水醋酸锰溶于冰醋酸中，用高锰酸钾将其氧化成三价醋酸锰。
Oxidizing agent was prepared by means of anhydrous manganous acetate dissolved in glacial acetic acid and oxidized to divalent manganic salt by potassium permanganate.
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