查询词典 adamantine boron

In this thesis, the catalytic properties of haloid compounds of boron group elements in organic synthesis have been studied.

考察了硼族元素卤化物作为路易斯酸对有机反应的催化性能。

Results indicate that brine of salt lakes with high total salinity are rich in boron and lithium. Their brine hydrochemistry types belong to magnesium sulfate and sodium sulfate subtypes.

通过时化学组分及水化学特征系数的研究，卤水的水化学类型主要为硫酸镁亚型和硫酸钠亚型。

Boron can also affect the dendrite of hypoeutectic Ti-Si eutectic alloy.

铝是钛合金的重要元素之一。

It is found that the Co/Zr ratio in the powders was indistinguishably equal to the Co~(2+)/Zr~(4+) ratio in the original mixed solution and the boron content of the samples increased along with the addition rate of NaBH_4 solution.

还产物中的Co原子和Zr原子的摩尔数之比与金属盐混合溶液中的Co~(2+)与Zr~(4+)的摩尔浓度之比几乎相等。

A chromium free conversion coating at least equivalent in corrosion protective quality to conventional chromate conversion coatings can be formed on metals, particularly cold rolled steel, by a dry-in-place aqueous acidic liquid comprising: a component of anions, each of said anions consisting of at least four fluorine atoms and at least one atom of an element selected from the group consisting of titanium, zirconium, hafnium, silicon, and boron, and, optionally, ionizable hydrogen atoms, and optionally, one or more oxygen atoms; a component of cations of elements selected from the group consisting of cobalt, magnesium, manganese, zinc, nickel, tin, zirconium, iron, and copper; the ratio of the total number of cations of this component to the total number of anions of component being at least 1:5; sufficient free acid to give the composition a pH in the range from 0.5 to 5.0; a component selected from the group consisting of phosphorus-containing inorganic oxyanions and phosphonate anions; and a component selected from the group consisting of water-soluble and water-dispersible organic polymers and polymer-forming resins and, preferably, also including a component selected from the group consisting of tungstate, molybdate, silicotungstate, and silicomolybdate anions.

通过对包含以下成分的含水酸性液体进行干燥，可以在金属上形成无铬的转换涂层，该涂层与普通铬酸盐转换涂层相比，至少在抗腐蚀质量上等效：$_一种阴离子成分，所述各个阴离子包括至少4个氟原子，至少选自钛、锆、铪、硅与硼元素中的1个原子。任选地可离解的氢原子，任选地1个或多个氧原子；$_一种选自钴、镁、锰、锌、镍、锡、锆、铁与铜元素的阳离子成分，上述成分的阳离子总数与成分内的阴离子总数之比至少为1∶5；$_足够的游离酸以使该组合物的pH值在0.5～5.0的范围内；$_一种选自含磷的无机含氧阴离子与膦酸盐阴离子的成分；$一种选自水溶性与水可分散性有机聚合物与聚合物形成的树脂的成分，优选还包括一种选自钨酸盐、钼酸盐、钨硅酸盐与钼硅酸盐阴离子的成分。

Based on B-trichloroborazine with boron-nitrogen ring structure, the monomer was synthesized by substitution reaction with different molar ratio of propylamine/isopropylamine, then the corresponding polyborazine was obtained through thermal polymerization.

以三氯环硼氮烷为原料，将其与正丙胺/异丙胺进行共取代反应，制得了不同结构的取代单体，再经热聚合反应获得了相应的聚硼氮烷先驱体。

Based on B-trichloroborazine with boron-nitrogen ring structure, the monomer was synthesized by substitution reaction with different molar ratio of propylamine/isopropylamine, then the corresponding polylyborazine was obtained through thermal polymerization.

以三氯环硼氮烷为原料，将其与正丙胺／异丙胺进行共取代反应，制得了不同结构的取代单体，再经热聚合反应获得了相应的聚硼氮烷先驱体。

Magnesian stone ever served as the high grade boron that its Chinese and Western hides to be used without the raw material of alkaline fibre glass, but plan as a result of old exploitation, lack, grade drops serious, already cannot serve as at present

其中西藏的高品位硼镁石曾作为无碱玻璃纤维的原料使用，但由于多年开采、缺乏规划，品位下降严重，目前已无法作为

The borohydride is hydrogen source for an advanced fuel cell, Imol borohydride with water produces 4mol hydrogen and Imol of side product sodium metaborate. Regeneration of metaborate for recycle of boron brings forth a bright future to the new fuel cells. In this paper, a method for the preparation of sodium borohydride from sodium metaborate was proposed.

硼氢化钠是一种燃料电池的氢源，1mol硼氢化钠催化水解产生4mol的氢气及副产物偏硼酸钠，若能实现偏硼酸钠的循环利用，该燃料电池将有广泛的应用前景。

After correcting the concentration Clarke with the stream sediment accumulation coefficients,endogenic metalization scales of thirty-two kind elements were prognosised with the help of additive method of the order,and the prospect of silver and boron were analyzed.

在利用水系沉积物富集系数估计值对浓度克拉克值进行校正后，使用顺序号累加法对福建省32种元素内生成矿作用的规模进行预测排序，并分析了银，硼的资源潜力。

These are places without aristocratic baggage; egalitarian places open to talent, self-improving, engaged in learning and innovation through networks that were at once competitive and cooperative.

这些地方没有贵族遗风作祟，而且对于那些有天分的人是开放的平等之地，这些人善于通过那些曾经很具有竞争力与合作精神的关系网进行自我提高以及学习创新。

Christine: You don't want to see me?

你不想见我？