查询词典 vanadium oxide

Influence of Thickness on the Structural and Optical Properties of Vanadium Oxide Thin Films.

膜厚对氧化钒薄膜结构和光学性质的影响。

This paper focuses on a newly developed and patented titanium/vanadium oxide catalyst.

这篇论文的重点在于一类最新的开发并有专利权的钛/钒氧化物催化剂。

In this paper, the acetalization of benzylaldehyde and 1,3-propanediol in the presence of vanadium phosphorus oxide catalyst was studied.

研究了苯甲醛与1，3-丙二醇在钒磷氧催化剂作用下的缩醛化反应，考察了反应时间、醇醛比、催化剂用量、带水剂种类和用量等因素对苯甲醛1，3-丙二醇缩醛收率的影响。

Firstly, the molybdenum based catalysts modified by silver, phosphorus, vanadium using aluminum oxide as carrier were studied. The results showed that its catalytic performance for 1,2-propane glycol oxidation to methylglyoxal is good.

论文首先对以氧化铝为载体，在银、磷、钒修饰下的钼系催化剂进行了研究，通过实验发现该催化剂对丙二醇氧化制备丙酮醛具有高的催化活性和较好的选择性。

Molybdic oxide ; vanadium slag ; smelting ; ZG20CrMoV steel

氧化钼；钒渣；冶炼；铸造20铬钼钒钢

The present invention provides a preparing method of vanadic oxide by coal mine containing vanadium and fluorite.

含钒石煤矿和萤石联合制取五氧化二钒的方法。

Acylvanadium sulfate is prepared by mixing coal mine containing vanadium, fluorite mine and sulphuric acid, then pumped in the reactive tank, further chemical combination and dissolving, acylvanadium sulfate enters in solution, qualified vanadic oxide is prepared.

本方法是将含钒石煤矿、萤石矿和硫酸调浆后，泵入反应槽中，进行化合和溶解，生成硫酸酰钒而进入溶液，经液固分离后得到含钒浸出液，浸出液经采用铁屑还原、氨水中和、萃取、反萃、氨水沉钒、煅烧等成熟工艺处理后，便产出合格五氧化二钒。

Traditional method is the fundamental method of V - P - O catalyst preparation; Aerosol Precessing is a method of fast catalyst preparation; Flame Deposition Technique is one of method of preparing nanostructured Vanadium phosphorus Oxide.

但不同的制备方法对催化剂晶粒大小、晶型、比表面和耐磨程度影响较大。在v—P～O催化剂的研制过程中，人们对V—P—O催化剂的不同制备方法也进行了研究，以期合成反应性能更好的催化剂。

The set includes: powerful ratcheting handle, comfortable grip, chrome vanadium steel keys with black oxide coating for hardness.

该套装包括：强大的棘轮手柄，舒适的抓地力，铬钒为黑色氧化膜硬度钢的关键。

The results show that the surface layer of the air-exposed ZrVFe getter is covered with H20, CO2 and hydrocarbons, both Zr and V exist in the oxidized state, and vanadium oxide starts to reduce at 200℃. The activation results in the enrichment of Zr on the getter surface and the formation of the metallic carbides. H2O, CO2 and hydrocarbons sequentially desorb from the surface with the increase of temperature. H2 is the main gas which desorbs above 200℃ and O2 is not discovered. ZrO2 is reduced to near-metallic or metallic state because O in ZrO2 leaves the getter surface through diffusing into getter bulk.

结果表明：暴露于过大气的吸气剂表面覆盖着H2O、CO2及碳氢化合物等，Zr和V主要以氧化态存在；在吸气剂加热激活过程中，V的氧化物在200℃开始还原；激活过程导致表面近金属态Zr的富集以及部分金属碳化物的生成；随着温度的升高，H2O、CO2及碳氢化合物逐渐从吸气剂表面脱附，在200℃以上，主要脱附气体为H2，整个激活过程未发现O2；ZrO2还原为近金属态或金属态，主要是由于ZrO2中的O通过向吸气剂内部扩散而离开吸气剂表面所致。

The receding calculations and experiment analyses in this subject are built on the blood cast of pig tongue.

本研究课题的前期工作是采用猪舌血管铸型模拟人舌而进行的数值计算与实验分析。

"Each human infection constitutes an opportunity for genetic modification of the virus through reassortment, mutation, or both...."

&每一次人类的感染都暗藏着一次基因修改的机会，无论是通过病毒的整合、突变或者兼而有之。。。。&