查询词典 nitride

This paper investigates the deposition process of silicon nitride with PECVD using the SiH_4/N_2 gas mixture.

本文对(SiH_4-N_2)混合气体等离子体增强化学气相淀积氮化硅薄膜工艺进行了研究。

Qualitative. Jingmo. Nitride surface, polishing process from refining, with high wear-resistant.

精磨。表面氮化，抛光等工艺精制而成，具有高耐磨。

Aiming to a method for the synthesis of silicon nitride powder by direct nitridation process based on fluidization technology, a two-dimensional mathematical model of thermal process in a suspended bed was established, the thermal process was simulated based on the commercial CFD software FLUENT, and the effects of the flow velocity of nitrogen gas, the ratio of particle to gas and nitridation temperature on the temperature of the bed and the conversion rate of silicon were analyzed.

针对基于流态化技术利用硅粉直接氮化合成氮化硅粉的新工艺，建立了悬浮床内热过程的二维数学模型，并借助CFD商业软件FLUENT对悬浮床内热过程进行了数值模拟，分析了氮气速度、粉气比和氮化温度等因素对温度场和硅转化率的影响。

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。

Tape casting process of aluminium nitride substrate was studied from the following aspects such as particle size,the style of slurry fluid,drying condition and debinding mechanism.

从颗粒尺寸、浆料流体类型、干燥条件、排胶机制等方面对流延法制备AlN陶瓷基板展开了较为系统的研究。

Microstructure-evolution of the silicon nitride ceramics sample during sintering process was investigated by a synchrotron radiation X-ray computed tomography technique. The projection images of the sample were obtained during the sintering process in real-time. 2-D and 3-D reconstructed images were obtained by treating the projection images of different sintering periods with filter back projection arithmetic and digital image processing methods.

利用同步辐射CT技术，在氮化硅陶瓷样品烧结过程中对其进行实时投影成像，并应用滤波反投影算法和数字图像处理技术，得到了样品在整个烧结过程中内部微结构演化的二维和三维重建图像，实现了对陶瓷固相烧结过程实时、无损的观测。

The mainly conclusions in our research are as flowing: tungsten trioxide powders with 100 nm primary particle are obtained by spray drying,calcination and wet milling process, and an average size of quadric particle composed of agglomerated particles is 0.64 μm; tungtsen powders with 39 nm grain size and 60 -100 nm primary particle are produced directly from previous tungsten trioxide using one step reduction in hydrogen at 700℃, and an average size of quadric particle of tungsten powder is 2.91 μm; tungsten trioxide and copper tungstate compound powders with 100 nm - 200 nm primary particle are produced using ammonia metatungsten and copper nitrate as raw materials by spray drying,calcination and wet milling process;the compound powders are transformed completely into tungsten and copper compound powders by reduction in hydrogen at 700℃,in which tungsten grain size is 59 nm and copper grain size is 51 nm; primary particle size of compound powders is 80 - 120 nm,and an average size of agglomerated quadric particle is 1.86 μm; tungsten nitride powders with 35 nm grain size are prepared from tungsten trioxide powders by nitrogen treatment thoroughly in pure ammonia at 650℃, and an average size of agglomerated quadric particle is 0.64 μm in normal temperature.

研究结果表明：采用喷雾干燥—焙烧—球磨工艺可以制备出粒度约为100nm的WO_3粉体，它们在团聚后形成的二次颗粒平均粒度为0.64μm；采用一步直接氢还原方法可在700℃下从上述WO_3粉体制备出晶粒尺寸为39nm的、一次颗粒粒度为60-100nm的W粉体，其二次颗粒的平均粒度为2.91μm；以偏钨酸铵、硝酸铜为原料，采用喷雾干燥—焙烧—球磨工艺可制备出一次粒度为100-200nm的WO_3和CuWO_4混合粉体；采用氢还原工艺可在700℃下将这种粉体完全转变为W、Cu复合粉体，其中W的平均晶粒粒尺寸为59nm，Cu的平均晶粒尺寸为51nm；复合粉体的一次颗粒尺寸为80-120nm，在常温下团聚后形成的二次平均粒度为1.86μm；采用纯氨氮化工艺可以在650℃下由WO_3粉体制得WN，其晶粒尺度为35nm，在常温下团聚后的二次平均粒度为6.4μm。

Nitride Semiconductor QD's are of interest both from a fundamental physics perspective, enabling the study of zero-dimensional objects analogous to artificial atoms, and also because of potential device applications, particularly in the field of optoelectronics.

族氮化物量子点的研究不但可以从基础物理方面推动类似人造原子的零维物体的研究，而且在器件应用特别是光电子领域存在巨大的潜力。

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。

Aluminum gallium indium nitride quaternary epilayers were prepared by metalorganic chemical vapor deposition on c -plane sapphire （α-Al2O3） substrates.

利用金属有机物化学气相沉积方法在 c 面蓝宝石（α-Al2O3）衬底上外延生长了铝镓铟氮四元合金薄膜。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48