查询词典 material particle

Results show that:(1) For each particle size of andalusite, variation tendency of the properties of the material is generally the same: the maximum of bulk density, compressive strength and rupture strength appears in the range of 5%-10% content of fiber, these properties of the material remarkably decrease as the fiber content exceed 10%; while at the same fiber content, the properties of the material increase with the increase of firing temperature.

结果表明：(1)对于不同粒度的原料，性能变化规律大致相同：在同一烧成温度下，体积密度、常温耐压强度、常温抗折强度在5％～10％之间出现峰值，加入量超过10％之后材料的性能明显下降；在相同的纤维含量下，随着烧成温度的提高，试样的各项性能均有所上升。

Through above improvement with perfect on antetype equipment foundation have made NMP-Ⅰtype metal nanometer particle preparation installation, so to have established material foundation for prepare metal and alloy nanometer particle.

通过以上的改进和完善在原型设备基础上制作了NMP-1型金属纳米微粒制备装置，从而为制备金属与合金纳米微粒奠定了物质基础。

In this paper, the effects of factors like flotation、cooling velocity on distribution and microstructure of the material were studied under the condition of unidirectional and multidi〓tional solidification, an order of magnitude analysis was performad in order to understand the dynamics of an advancing solid/liquid interface behind a particle as well as the behavior of the particle in front of the interface, and a model of critical velocity for the pushing/engulfment transition of particles by the interface was built, the theoretic result gave a good explain to experimental one.

本文考察了在常规铸造和定向凝固条件下，浮力、冷却速度等因素对SiC颗粒分布以及材料组织的影响，分析了颗粒在凝固过程中的行为以及对界面的作用，建立了在胞状树枝晶凝固条件下枝晶对颗粒的推移/吞并临界速度模型，理论分析和实验结果基本一致。

Material is schematized at mesoscale level as an assembly of particle elements in the BPM, and the nearest neighboring particle elements are connected through a lattice of elastic beam elements.

粱一颗粒模型中，材料在细观层次上被离散成颗粒单元集合体，相邻颗粒单元由有限单元法中的弹脆性梁单元连接。

This paper adopt impact particle abrasion test and dissimilar steel welding test as mainly trial method to screen out the superior wearable material of pickax boot and discuss the question of the welding between wearable material of pickax boot and the pickax body material.

本论文采用冲击磨料磨损试验和异种钢焊接试验为主要试验方法，筛选出耐磨性能最优的镐靴耐磨材料以及探讨镐靴耐磨材料与镐体材料的焊接问题。

The experiment is carried out to study factors of influence on particle grinding, which means that the factors of the influence on the grinding efficiency are related to fed material properities (the particle size, the particle hardness and moisture), the operation parameters and the structure of pulverizer.

对GLS销棒粉碎机粉碎的影响因素进行了实验研究，指出粉碎物料的物理性质（颗粒的粒径、硬度及湿度）、粉碎机的操作因素和粉碎机的内部结构对粉碎产品的超细程度影响较大，提出了提高粉碎效率的一些行之有效的办法。

The experimental results show that the mean particle size of griseofulvin precipitated by RESS is smaller than 1, 0μm, narrow distribution and 95％ fine particles is smaller than 1. 0μm. Increase of the pre-expansion pressure, the extraction temperature, the expansion chamber temperature, the spraying distance, the concentration of cosolvent and decrease of the nozzle diameter resulted in decrease of the particle size under the operating condition studied. Enhancement of the pre-expansion temperature resulted in increase of the particles size. The SEM of GF shows that the shape of original is atactic and a wide size distribution, but the microparticles obtained by RESS is reverse. Similar melting points and XRD patterns were observed for the original material and the precipitates obtained by RESS.

实验结果表明，用含夹带剂的RESS法制备的灰黄霉素微粒的平均直径在1μm左右，且分布均匀，95％微粒在1μm以下，仅用CO〓作为超临界流体制备的微粒与上述方法制备的微粒的平均直径和分布相似，只是产量太低，而用机械法制备的微粒平均直径在3μm左右且分布较宽；不同的过程参数对沉析微粒尺寸有不同的影响，预膨胀压力、膨胀室温度、溶解温度以及夹带剂浓度的提高或增大，均可使沉析微粒的直径变小；预膨胀温度提高，所得微粒的直径变大；喷射距离的增加，沉析微粒的直径变小；喷嘴直径越小，由此制得的微粒的直径就越小；根据实验结果还可知道，通过理论计算的马赫盘处微粒的直径可以较好地估计出膨胀室中收集到的微粒的直径。

The invention discloses a dielectric hole-microhole composite material and synthesizing method in the inorganic porous material, adsorbing material and catalytic material technical domain, which comprises the following steps: adopting zeolite molecular sieve as raw material; reacting with sodium bisilicate solution under 30-60 deg.c for 10-300 min; disintegrating particle part of zeolite molecular sieve into piece with microhole structure; adding cetyl trimethyl ammonium bromide as molder; adjusting pH value of mother liquid to 10-12; aging 1-8h; adding in the high-pressure autoclave to do water heat synthesizing reaction at 80-130 deg.c for 24-72h; separating solid; washing; drying; sintering under 500-600 deg.c for 5-10h; obtaining the Si-Al porous material with dielectric hole and microhole composite structure.

本发明属于无机多孔材料、吸附材料和催化材料技术领域，涉及具有介孔-微孔复合材料及其合成方法。其特征是以沸石分子筛为原料，用偏硅酸钠的水溶液在30～60℃反应10～300分钟，使沸石分子筛的颗粒部分解离形成具有微孔结构的碎片，加入模板剂十六烷基三甲基溴化铵，然后调节母液pH值为10～12，老化1～8小时，然后加入高压釜于80～130℃进行水热合成反应。反应24～72小时后，分离出固体，水洗、干燥，然后于500～600℃焙烧5～10小时，得到具有介孔和微孔复合结构的硅铝多孔材料。本发明的效果和益处是所发明的合成方法可用于合成多种沸石结构和介孔结构的复合材料，所合成的材料经过质子交换可以具有较强的酸性，在吸附和催化领域具有广泛应用前景。

The invention discloses anti-collision elastic material, which mainly consists of epoxy resin, polybasic amine curing agent, metal powder and slate powder enhanced particle, and the weight proportion of each component is as follows: epoxy resin of 25 to 30 parts, polybasic amine curing agent of 10 to 16 parts, metal powder of 42 to 45 parts and slate powder enhanced particle of 54 to 58 parts.

本发明公开了一种防撞击的弹性材料，其主要成分有环氧树脂和多元胺类固化剂，以及金属粉和石粉增强粒子，各组分的重量配比是：环氧树脂25～30，多胺类固化剂10～16，金属粉42～45，石粉增强粒子54～58。

Plackett-Burman experimental design and the uniform experimental design were used to select the main factors of the ball milling pretreatment of corn stalk. The experimental results were analyzed by data processing software and well-fitted regression equation was established. Effects of ball milling parameters, such as raw material diameter, speed, ratio of raw materials, grinding media and alternating time, on the enzymolysis were analyzed. The optimal parameters of ball milling pretreatment of the corn stalk were as follows: particle size of raw material of 0.5 mm, speed of 340 r/min, the raw material content of 3.4 g, the number of ball of 15 (Ф= 10.0 mm), alternating running time of 5 min.

研究了玉米秸秆水解过程中球磨预处理工艺的优化，采用Plackett- Burman 试验设计和均匀试验设计法，用数据处理软件对试验结果进行分析，筛选出了球磨预处理过程中的主要影响因素，得到了具有较好拟合度的回归方程；通过分析原料粒径，转速，原料填装量，研磨介质，交替时间等球磨条件对酶解效率的影响，得出行星式球磨机粉碎玉米秸秆的最佳工艺参数为：原料粒径0.5 mm，转速340 r/min，原料填装量3.4 g，装球量15个（Ф=10.0 mm），交替运行时间5 min。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。