ThO2 Nano Powder

Raw Material

Experimental materials used for the business of W powder and ThO2 powder, W powder grades for the GW-06, a purity of 99.6%, an average particle size of about 0.6μm. The Th (NO3) 4 from the thermal decomposition, Fei average particle size of -300 mesh, 99.5% purity.

Equipment and Process Parameters

High-energy ball milling equipment for the German Simoloyer01-2LM type horizontal mill, like this:
this type of high-energy ball mill Simplified and stirring rod made ​​of special wear-resistant alloy, balls made ​​of bearing steel, spindle speed and the milling process are computer controlled milling time, milling can be used in inert gas or in a vacuum state. This type of high-energy ball milling with high efficiency, uniform particle size, and low impurity content. Ball Mill inner diameter of 146mm, ball diameter of 5mm. The aviation gasoline was chosen as the grinding media and through the circulating water cooling protection.

Milling time and the amount of energy is kinetic energy ball milling determinants made ​​of powder on the granularity of uniformity and impurities play a decisive impact. These factors have an impact on the high-energy ball milling process parameters as rotational speed, ball feed ratio, milling time, nature of raw materials, materials and so gentle atmosphere. In this experiment, the milling process of adding aviation gasoline role is to improve the grinding efficiency, improve the lubrication conditions and reduce equipment wear and improve the uniformity of the powder, the powder to reduce pollution. In the milling process, through the grind at different time intervals to take powder, the powder particle size test, uniformity and impurity content, etc., through process optimization.

Mixture Process

Nanoparticles due to the large specific surface area and surface atoms ligand insufficient, with a strong surface activity and strong adsorption, making them easy to join together to form a weak-link interface with a plurality of larger size aggregates .

Swaging Process

Preparation of nanocomposite carved forging W-2% ThO2 electrode material of this test in Taebaek tungsten alloy plant, the specific process is as follows:
(A) mixing (2) Compression (3) pre-sintered (4) vertical melt sintering (5) swaging (6) drawing (7) straightening polished.


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