氮化

However, the conditions of solid state phase transformation of BN nanoparticies are still rather harsh.

尽管如此，以六方氮化硼纳米粉为原料制备立方氮化硼时，仍需要使用很高的温度和压力。

The main parts of the exchanger are all adopt nitrided steel and through nitrogen treatment, so as to guarantee the exchanger wearproof.

液压站功率1.5kw 。换网器主要部件全部采用氮化钢并氮化处理，从而保证换网器不磨损。

OBJECTIVE To determine the relative and absolute molecular weight of working reference substance of Grifolafrondosa beta-Glucan and compare the two analysis methods.

目的测定灰树花倍他葡聚糖工作对照品的相对及绝对分子质量，并对两种分析方法进行比较。方法色谱柱为TSK-G4000PW，流动相为0.7%硫酸钠(含0.02%叠氮化钠)或0.2%叠氮化钠溶液，流速为0.5 mL.min-1，柱温为35℃，高效凝胶渗透色谱法用示差折光检测器，高效凝胶渗透色谱和激光光散射联用法用DNDC仪和激光光散射仪联用。

Because the properties of the hexagonal boron nitride particles are much different from those of the yttria powders,resulting in some problems in process of preparing the hBN shell mould .

在型壳制备过程中除了使用氮化硼作为面层造型材料外，用钇溶胶作为粘结剂，同时通过加入少量的氧化钇来改善氮化硼基复合型壳的性能。

Sialon powders have been synthesized by carbonthermic and aluminothermic reduction and nitridation from natural Kaolin. The cost is 2030 times lower than that forming pure β′-Sialon from artificial materials.

首次以天然高岭土为原料，通过碳热还原氮化和铝热还原氮化两种途径制备β'-Sialon粉体，它比用合成原料制备的纯β'-Sialon成本下降20－30倍。

In the third part of this paper, a facile method is presented for synthesis of malonaldehyde dianil from propargyl alcohol by oxidizing using chromium trioxide and addition reaction with aniline.

对肼基苯磺酸是由对氨基苯磺酸经亚硝酸钠重氮化得到的重氮盐用亚硫酸氢钠还原、水解、硫酸酸化制得，本文经多次实验确定了反应原料、用量及反应条件，得到的产品纯度好，产率高。

The primary performances of nitrogen-rich compounds on the gas generant composition of automobile crash airbag system are studies. Based on the closed bomb tests, the P—t curves are obtained and compared with NaN〓. It is shown that the burning velocity of five compounds are higher than that of NaN〓.

研究了富氮化合物作为气体发生剂使用的基础性能，采用密闭爆发器法测出了它们燃烧过程的P-t曲线，并与常用的叠氮化钠类气体发生剂的性能进行了比较，结果表明其中5种药剂的燃烧速度优于叠氮化钠。

Pulsed power supply has anumber of advantages such as energy saving by about 30%,restraining are discharge re-liably,repressing the dffect of the hollow cathode,improving the homogene...

脉冲电源能可靠迅速灭弧，散弧清洗速度快，能够消除或减弱空心阴极效应，解决了具有深孔或沟槽的复杂零部件和齿轮根部的氮化难题，易于选择最佳工艺参数，提高氮化质量，并比直流电源节约电能30％左右。

The using instance of mould is complex, its always abated by abrasion, fatigue, or bad hot stability, and so on. To extend the longevity of mould, people try to use general heat treatment and other surface treatment, especially the gas nitriding, because of its inherent excellence, such as wearable、incohesive、co-fatigue、stand against permanence intensity and causticity under changeable load and so on, also the gas nitriding facility is cheapness, so the gas nitriding technics is abroad used.

为了提高模具的使用寿命，人们除了采用常规热处理外，各种表面强化技术也被广泛应用，特别是气体氮化工艺，因其能显著提高工件的耐磨性、抗擦伤性能、抗粘和性能、接触疲劳性能、冲击或交变载荷下的持久强度和耐腐蚀性能等，而且气体氮化工艺设备投资、生产成本低，更是被广泛关注。

Racemic backbones 2-amino-2'-hydroxy-6,6'-dimethyl-l,l'-biphenyl la and 2-amino-2'-hydroxy-4,4',6,6'-tetramethyl-l,1'-biphenyl 1b were synthesized from o-methylaniline and 2,4-dimethylaniline via nitration, diazotation/iodination, Ullmann coupling, selective reduction, diazotation/hydrolysis and hydrogenation.

从邻甲苯胺及2，4-二甲基苯胺出发，经过硝化，重氮化-碘代，偶联，单还原，重氮化-水解及还原反应合成了消旋体骨架2-氨基-2'-羟基-6，6'-二甲基-1，1'-联苯1a和2-氨基-2'-羟基-4，4'，6，6'-四甲基-1，1'-联苯1b。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。