保定市氮化铝厂

Production method

1.将氨和铝直接进行氮化反应，经粉碎、分级制得氮化铝粉末。或者将氧化铝和炭充分混合,在电炉中于1700℃还原制得氮化铝。

1. the ammonia and aluminum were directly nitridation, and the aluminum nitride powder was prepared by crushing and grading. Or the alumina and carbon are mixed enough to be reduced to aluminum nitride at 1700 C in the electric furnace.

2.将高纯度铝粉脱脂(用乙醚抽提或在氮气流中加热到150℃)后，放到镍盘中，将盘放在石英或瓷制反应管内，在提纯的氮气流中慢慢地进行加热。氮化反应在820℃左右时发出白光迅速地进行。此时，必须大量通氮以防止反应管内出现减压。这个激烈的反应完毕后，在氮气流中冷却。由于产物内包有金属铝,可将其粉碎，并在氮气流中于1100～1200℃温度下再加热1～2h，即得到灰白色氮化铝。

2., the high purity aluminum powder is degreased (extracted by ether or heated to nitrogen temperature in the nitrogen flow to 150 degrees), then placed in the nickel tray. The disk is placed in a quartz or ceramic reaction tube and heated slowly in the purified nitrogen flow. The nitriding reaction was made by white light at about 820 degrees centigrade. At this time, a large amount of nitrogen must be used to prevent the reduction in the reaction tube. After this intense reaction is finished, it is cooled in a nitrogen flow. Because of the metal aluminum in the product, it can be crushed and reheated at 1100~1200 C in the nitrogen flow for 1 ~ 2H, that is, the grey AlN is obtained.

另外，将铝在1200～1400℃下蒸发气化，使其与氮气反应即得到氮化铝的须状物(金属晶须)。此外,也有将AlCl3·NH3加成物进行热分解的制法。

In addition, the aluminum was vaporized at 1200~1400 C to react with nitrogen to obtain the whisker of aluminum nitride (metal whisker). In addition, the thermal decomposition of AlCl3 NH3 adduct is also made.

3.直接氮化法 将氮和铝直接进行氮化反应，经粉碎、分级制得。氮化铝产品质量受反应炉温、原料的预混合以及循环氮化铝粉末所占的混合比例、氮化铝比表面积等条件的影响。因此需严格控制工艺过程，得到稳定特性的氮化铝粉末(如比表面积、一次粒径、凝聚粒径、松密度和表面特性等)。

3. nitridation was directly nitridation of nitrogen and aluminum, which was made by crushing and grading. The quality of AlN product is affected by the reaction temperature, raw material premix and the mixing ratio of aluminum nitride powder and the specific surface area of aluminum nitride. Therefore, we must strictly control the technological process and get stable aluminum nitride powder (such as specific surface area, primary particle size, aggregate size, loose density and surface characteristics).