Aluminum nitride is a covalent compound, belonging to the six party crystal system, and the crystal structure of the zinite type is white or gray.

物理性质

Physical property

密度：3.26

Density: 3.26

熔点：>2200 ℃(lit.)

Melting point: >2200 C (lit.)

性状：powder

Character: Powder

溶解性：MAY DECOMPOSE

Solubility: MAY DECOMPOSE

（氮化铝粉末）

(aluminum nitride powder)

化学性质

Chemical property

室温强度高，且强度随温度的升高下降较慢。导热性好，热膨胀系数小，是良好的耐热冲击材料。具有优异的抗热震性。AlN的导热率是Al2O3的2～3倍，热压时强度比Al2O3还高。氮化铝对Al和其他熔融金属、砷化镓等具有良好的耐蚀性，尤其对熔融Al液具有极好的耐侵蚀性，还具有优良的电绝缘性和介电性质。但氮化铝的高温抗氧化性差，在大气中易吸潮、水解，和湿空气、水或含水液体接触产生热和氮并迅速分解。在2516℃分解，热硬度很高，即使在分解温度前也不软化变形。氮化铝和水在室温下也能缓慢地进行反应，而被水解。和干燥氧气在800℃以上进行反应。

The strength of room temperature is high, and the strength decreases slowly with the increase of temperature. The thermal conductivity is good, the thermal expansion coefficient is small, and it is a good heat resistant material. It has excellent thermal shock resistance. The thermal conductivity of AlN is 2~3 times that of Al2O3, and the strength of hot press is higher than that of Al2O3. AlN has good corrosion resistance for Al and other molten metals and GaAs. Especially for molten Al, it has excellent corrosion resistance and excellent electrical and dielectric properties. However, the high temperature oxidation resistance of aluminum nitride is poor, it is easy to absorb moisture and hydrolyze in the atmosphere, and contact with wet air, water or aqueous liquid to produce heat and nitrogen and decompose rapidly. The thermal hardness is very high at 2516 C, and the deformation is not softened even before the decomposition temperature. Aluminum nitride and water can also react slowly at room temperature and are hydrolyzed. And the dry oxygen is reacted above 800 degrees centigrade.

生产方法

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).

储运条件

Storage and transportation conditions

干性的保护气体下处置，保持贮藏器密封，放入紧密的贮藏器内,储存在阴凉,干燥的地方。

Dry protection gas disposal, keep the storage device sealed, put in a tight storage device, stored in a cool, dry place.

（氮化铝基板）

(aluminum nitride substrate)

产品用途

Product use

1.氮化铝陶瓷是一种高技术新型陶瓷。氮化铝基板具有极高的热导率，无毒、耐腐蚀、耐高温，热化学稳定性好等特点,是大规模集成电路，半导体模块电路和大功率器件的理想封装材料、散热材料、电路元件及互连线承载体。也是提高高分子材料热导率和力学性能的最佳添加料，氮化铝陶瓷还可用作熔炼有色金属和半导体材料砷化镓的坩埚、热电偶的保护管、高温绝缘件、微波介电材料、耐高温、耐腐蚀结构陶瓷及透明氮化铝微波陶瓷制品，用作高导热陶瓷生产原料及树脂填料等。氮化铝是电绝缘体，介电性能良好。砷化镓表面的氮化铝涂层，能保护它在退火时免受离子的注入。

1. aluminum nitride ceramics is a new type of high technology ceramics. Aluminum nitride substrate has high thermal conductivity, non-toxic, corrosion resistance, high temperature resistance and good thermochemical stability. It is ideal packaging material, heat dissipation material, circuit elements and interconnect carrier for large scale integrated circuits, semiconductor module circuits and high-power devices. The best additive is to improve the thermal conductivity of polymer materials and mechanical properties, but also can be used as protection of aluminum nitride ceramic crucible, thermocouple for smelting non-ferrous metal and semiconductor materials of the GaAs tube, high temperature insulation, microwave dielectric materials, high temperature resistant and corrosion resistant ceramic structure and transparent aluminum nitride ceramics used as microwave, high thermal conductivity ceramic production the raw material and resin filler etc.. Aluminum nitride is an electrical insulator with good dielectric properties. The aluminum nitride coating on the surface of gallium arsenide protects it from the ion implantation during annealing.

2.用作高导热陶瓷生产原料、AlN陶瓷基片原料、树脂填料等。

2. is used as a high thermal conductive ceramic raw material, AlN ceramic substrate material, resin filler and so on.