铝热法

The preparation methods of ultrafine alkaline earth aluminate and its properties were reviewed in this paper.

对超细碱土铝酸盐长余辉发光材料的制备方法及其制备后产品的性能做一综述，分别介绍了燃烧法、溶胶-凝胶法和水热法在制备超细碱土铝酸盐长余辉发光材料中的应用。

Four kinds of stainless steel lined composite pipes were produced using C—T process with raw materials Fe〓O〓, CrO〓, NiO, chrome iron and Al powders.

本论文主要研究在采用离心——铝热法制备不锈钢内衬复合钢管过程中，原料的配方以及工艺参数对不锈钢内衬层的成分、组织、裂纹和性能的影响。

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。

Based on the features of Panzhihua titanium concentrate,the reasons why titanium recovery is low and aluminum consumption is high when ferrotitanium is smelted in alumino-thermic process were analyzed.

结合攀枝花钛精矿的特点，探讨了采用铝热法冶炼钛铁时钛回收率低、铝耗量高的原因，并提出了相应的解决措施。

Ferrovanadium is a kind of important transitional metal alloy for the tool steel,refractory steel.

钒铁是生产工具钢、耐热钢的一种重要中间合金，目前主要采用铝热法生产。

The mainly preparation of ferrovanadium is aluminothermic reduction currently.

钒铁是生产工具钢、耐热钢的一种重要中间合金，目前主要采用铝热法生产。

It is the first time to use centrifugal—thermit process to produce stainless steel lined composite pipes.

本工作首次采用离心——铝热法制备不锈钢内衬复合钢管。

Aluminum oxide;Nickel aluminide;Functional gradient composite material;Oxidation resistance;Hydrothermal method;Hydrothermal anodic oxidation

中文关键字氧化铝；镍铝介金属；功能梯度复合材料；抗氧化性；水热法；水热阳极氧化法

In this test, two new processes are studied on preparation strontium by the vacuum aluminothermy reduction and Al-Sr alloys by molten salt electrolysis.

本文研究了真空铝热还原法生产金属锶和熔盐电解法生产铝锶合金的两种新工艺。

In this test, two new processes are studied on preparation strontium by the vacuum aluminothermy reduction and Al-Sr alloy s by molten salt electrolysis.

本文研究了真空铝热还原法生产金属锶和熔盐电解法生产铝锶合金的两种新工艺。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。