Nanocomposite W-4.5% ThO2 Electrode Materials

Process Points

Highly doped nano-composite W-ThO2 electrode materials Preparation is the key process mixed doped W powder. Added amount of ThO2, size, and other factors added directly affect the W powder, the dopant concentration and ultimately the final properties of the finished material.

Production of high-doped nano-composite W-ThO2 electrode wire craftsmanship and production of nano composite W-2% ThO2 electrode wire process is slightly different.

Doped nano-composite W-ThO2 electrode materials technology points are:

(1) Mixing powder is the key that can make high-doped oxide powder dispersed in the W are the factors that determine everything, so Mixture Process to be carefully controlled, the use of composite powder mixing process is more reasonable, such as the use of ultrasonic + high-energy ball milling method is more reasonable.

(2) Two kinds of fine powder in the production of blanks will appear low bulk density, easy to stick molds, compacted density, strength and low defects, resulting in process yield is very low. Therefore, the compression pressure is higher than the traditional process of molding pressure, dwell time longer than the traditional process.

(3) Pre-sintering, vertical melt, swaging and other processes to be slightly higher than the processing temperature of nano-composite W-2% ThO2 electrode.

ThO2 Content Determination: The nano-composite W-ThO2 electrode material terms. W is the base material, ThO2 as dopant.

Mixture Process

Particles in the matrix affect the uniformity of the distribution of particle reinforced / modified mechanical properties of composites and other features important factor is particularly important for nanocomposites. Particle distribution uniformity of the particles and the matrix itself including wetting properties, density, particle size, particle surface characteristics, material preparation method, particles in the matrix in an amount such factors are closely related, prepared by powder metallurgy particle reinforced / modified composite material , the particle distribution depends largely on the mixed powder method and process parameters. In this paper, an ultrasonic oscillation method + ball milling powder mixing method. First ultrasonic dispersion, drying the wet state, and then the ball mill mixing powder after drying, grinding.


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