查询词典 powder process

In the one half part, according to the strontium nature, thermodynamic calculation of correlative reaction and the principle of the vacuum aluminothermy reduction process, with the laboratory findings of preparation strontium by vacuum aluminothermy reduction compared and analyzed in different parameter conditions, a variety of factors which effect the decomposition rate of SrCO_3 and the percent reduction of strontia are gotten out. The factors include that the decomposition rate of SrCO_3 is influenced by different addition and pressure. They also include that the percent reduction of strontia is influenced by excess coefficient of reducing agent aluminium powder, the particle size of raw material or reducing agent, the pressure of barbecuing, temperature and reduction time. According to those, we can draw the conclusion as follows:(1) Decomposition temperature of SrCO_3 is decreased by adding carbon and alumina in different degree.(2) With quantitative carbon added under the vacuum condition, the decomposition temperature of SrCO_3 is decreased obviously, which can fall 150℃ compared with atmospheric pressure.(3) In keeping 1150℃ of 2.5h, under the 5Pa vacuum condition, the decomposition rate of SrCO_3 nearly keeps in 99% steadily.

在前半部分的真空铝热还原法中，根据锶的性质、相关反应的热力学计算及真空铝热还原法原理，通过对不同参数条件下的真空铝热还原法生产金属锶的实验结果的分析比较，得出了影响SrCO_3的分解率和氧化锶的还原率的种种因素，具体因素包括不同添加剂、不同气压对SrCO_3分解率的影响，还原剂铝粉的过量系数、原料与还原剂的粒度、制团压力、温度和还原时间等对氧化锶还原率的影响，得出具体结论如下：(1)添加碳和Al_2O_3能不同程度的降低SrCO_3的分解温度；(2)真空条件下加入一定量的碳可显著降低SrCO_3的分解温度，比之常压下可降低150℃之多；(3)在1150℃恒温2.5h、真空度达到5Pa的条件下，SrCO_3的分解率几乎保持稳定在99％；(4)氧化锶的还原率随还原剂过量系数的增大而增大，但是趋势越来越小，当过量系数超过25％后，氧化锶的还原率几乎不再增加；(5)氧化锶的还原率随原料与还原剂的粒度的变细而增加；(6)氧化锶的还原率随制团压力的增加而增加，但超过一定值后，氧化锶的还原率反而会下降；(7)氧化锶的还原率随还原温度的升高而增加；(8)氧化锶的还原率随还原时间延长而增加，在本实验条件下，超过2.5h趋于稳定。

The loss of weight of powder during combustion process, phase change, conglobation, grain size, crystalline grain distortion situation, maximum magnetic energy and coercive force were get detaily.

通过差重分析、红外光谱、扫描电子显微镜、能谱、化学相态分析、X射线衍射、振动样品磁强计等检测手段对所得的样品进行燃烧过程重量损失、相态变化、样品的分散性和均匀性、团聚情况、晶粒尺寸计算、晶格畸变情况、样品的最大磁能积、矫顽力等相关的性能进行检测。

Machinable canasite ; glass-ceramics and metal cupper functionally gradient materials ; the powder metallurgic process ; microstructure ; mechanical property ; element contents

可加工硅碱钙石；微晶玻璃/金属铜功能梯度复合材料；粉末冶金法；微观结构；力学性能；元素含量

This work can lay the theory foundation for the study of the powder densification process.

这些为研究粉体压制致密化过程提供了理论参考依据。

In the last chapter of this paper, a lot of experiments on the flow stress and densification process of powder metals deformed at elevated temperature have been made.

本文在最后章节里，对粉末体高温塑性变形时的流动应力和致密化过程，进行了大量的实验研究。

The result shows that the process of γ-tungsten oxide deoxidization is the key to produce ultra-fine W powder .

实验结果表明：γ-氧化钨氢还原过程是制取超细钨粉的关键环节。

A process of producing compact detergent powder with good flowability,high density and detergency was introduced.

介绍了一种具有高密度、良好流动性和高去污力的浓缩洗衣粉的生产方法。

Now that sells on the market the aroma of individual milk products beyond the normal milk flavor because the density and add in the machining process (dextrin and powder density etc.) and the taste of essence chemical composition.

现在市场上出售的个别牛奶产品之所以浓香，超出了正常牛奶的密度和味道，是因为在加工过程中添加了高密度物质和增味的香精化学成分。

Based on the fact that the volumetric expanding coefficient of the amorphous macromolecule powder during glass transition process experiences a rapid change and by means of dilatometer technique,a new method of measuring the glass transition temperatures of amorphous macromo...

基于非晶态高分子粉体的体膨胀系数在玻璃化转变时发生突变的原理，采用热膨胀计技术，提出了一种用膨胀计测量非晶态高分子粉体玻璃化转变温度的新方法——膨胀计法，并建立了相应的测量装置。

The effect of different content of disperser in the slurry to spray dried powder properties and liquid sinter process to metallurgical bonding of Cr3C2 and NiCr alloy was studied in this paper.

实验研究了不同分散剂含量对喷雾干燥制备Cr3C2–25%NiCr复合粉末性能的影响，液相烧结工艺对Cr3C2与NiCr合金相之间冶金化结合状态的影响。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。