氮化硼

With 1-methylte-trazole-5-thiol and 7-ACA as the material and acetonitrile-boron trifluoride complex as Catalysts, 7-TMCAHCl was preparated and the yield could reach 91.80%.

以1-甲基－5-巯基四氮唑和7-ACA为原料，三氟化硼乙腈配合物为催化剂合成了7-TMCA盐酸盐，反应收率可达91.80%。

Using butanediol as initiator, boron-trifluoride etherate as catalyst, 3-azidomethyl-3-methyloxetane homopolymer was synthesized by the cationic polymerization of 3-azidomethyl-3-methyloxetane which was carried out in dichlorometane.

以1，4-丁二醇为引发剂，以三氟化硼乙醚络合物为催化剂，以3-叠氮甲基－3-甲基氧丁环为单体，以CH2Cl2为溶剂，按阳离子开环聚合机理，合成了含能粘合剂3-叠氮甲基－3-甲基氧丁环均聚物。

Using pentaerythritol as initiator, boron trifluoride diethyl etherate as catalyst.dichloroethane as dispersion agent, the chloride polyether polyol is synthesized based on the mechanism of cationic ring-opening polymerization of epiclilnrohyclrin.The azide polyether polyol is synthesized, in DMF through A and sodium azide, and the non-reported azide energetic curing agent is synthesized through the adduction of B and IIDI.

以季戊四醇为起始剂，三氟化硼乙醚为催化剂，1，2—二氯乙烷为分散剂，环氧氯丙烷经阳离子开环聚合反应制成氯化聚醚多元醇，A在N，N—二甲基甲酰胺中与叠氮化钠反应制得叠氮聚醚多元醇，B与六亚甲基二异氰酸酯加成反应制得未见文献报道的叠氮固化剂。

In addition the company also sell a variety of borides Agents, zirconia grinding ball, lithium-bentonite, silicon nitride iron, Castable superplasticizer used, brick,×, silica and other refractory materials and products .

此外公司还代理销售各种硼化物、氧化锆研磨球、锂基膨润土、氮化硅铁、浇注料用高效减水剂、粘土砖、高铝砖、硅砖等多种耐火材料和制品。

To investigate the wear mode of the silicon nitride balls in lapping process, a series of abrasion tests were carried out on a ball-plate wear test apparatus with different loads, abrasive girt diameter, and slurry concentrations.

为掌握不同研磨条件下氮化硅(Si3N4)陶瓷球表面的磨损形式，在球－盘式磨损实验装置上，采用不同载荷及磨料粒度和浓度的碳化硼(B4C)磨料进行了磨损实验。

We are the spirit of "excellent quality, integrity of reciprocity" principle, we know the quality and technology on Product modeling and the importance of constant innovation and focus on high-quality requirements, the introduction of high-quality China-made high-quality steel and steel products "in Guangzhou Industrial Research Institute of Electrical and Mechanical Heat Treatment Technology Research Center "co-operation to provide customers with high-quality steel heat treatment and testing services, including high-quality vacuum hardening, nitriding, carbonitriding, boron nitrogen permeation, soft nitriding, annealing, quenching and tempering,, the high-frequency surface hardening, surface hardening VHF, chemical surface heat treatment, vapor deposition, such as titanium nitride.

我们本著&卓越品质，诚信互惠&的原则，我们深知质量及技术对制模及产品之重要性，不断创新服务及注重高品质要求，推出国产名优钢厂之优质钢材及与&广州市机电工业研究所热处理技术研究中心&合作为客户提供高品质热处理及钢材化验服务，含高质素真空淬火、氮化、碳氮共渗、硼氮共渗、软氮化、退火、调质、中、高频表面淬火、超音频表面淬火、化学表面热处理，气相沈积氮化钛等。

By the use of molecular dynamics method, the axial compressive process of both perfect and defective single-walled BN nanotubes is simulated.

采用分子动力学方法，分别模拟了完好的和含有缺陷的氮化硼纳米管的轴向压缩过程。

By the use of molecular dynamics method, the axial compressive process of both perfect and defective single-walled BN nanotubes was simulated.

采用分子动力学方法，分别模拟了完好的和含有缺陷的氮化硼纳米管的轴向压缩过程。

The production,assortments,applications and developing features of diamond,CBN and their tools are briefly introduced in this paper.

本文对金刚石、立方氮化硼及其工具的产量、品种、应用及发展特点等作了概述。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。