A method for improving the internal porosity of sintered tantalum blocks
A technology of porosity and tantalum blocks, which is applied in the field of improving the internal porosity of sintered tantalum blocks, can solve the problems that the product qualification rate cannot be greatly improved, lack of theoretical support, etc., and achieve improved coverage rate, high efficiency, and low input cost Effect
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Embodiment 1
[0075] (1) Use an analytical balance to weigh the required tantalum powder, and pour the tantalum powder into a self-made powder mixer. Pour the prepared 3% stearic acid binder solution into the tantalum powder in 6 times, and use a spoon to assist stirring until the binder solution is added. Use a self-made powder mixer to stir, the temperature is 45°C, the speed is 40r / min, and the time is 60min. After stirring, cool to room temperature for use;
[0076] (2) Add the mixed tantalum powder into the CX-V automatic molding machine for molding, set the molding parameters of each test product on the molding machine and keep them consistent, and the molding density is 5.4g / cm 3 .
[0077] (3) Heat and remove the tantalum block of stearic acid in a vacuum pre-burning furnace, the heating rate is 10°C / min, the temperature is 500°C, the time is 2h, and the vacuum degree is ≤8×10 -3 Pa, after the end of the constant temperature, it was naturally cooled to room temperature and taken o...
Embodiment 2
[0080] (1) Use an analytical balance to weigh the required tantalum powder, and pour the tantalum powder into a self-made powder mixer. Pour the prepared 3% polypropylene carbonate binder solution into the tantalum powder in 6 times, and use a spoon to assist stirring until the binder solution is added. Use a self-made powder mixer to stir, the temperature is 45°C, the speed is 40r / min, and the time is 60min. After stirring, cool to room temperature for use;
[0081] (2) Add the mixed tantalum powder into the CX-V automatic molding machine for molding, set the molding parameters of each test product on the molding machine and keep them consistent, and the molding density is 5.4g / cm 3 .
[0082] (3) Heat and remove the tantalum block of polypropylene carbonate in a vacuum pre-burning furnace, the heating rate is 10°C / min, the temperature is 500°C, the time is 2h, and the vacuum degree is ≤8×10 -3 Pa, after the end of the constant temperature, it was naturally cooled to room t...
Embodiment 3
[0094] (1) Use an analytical balance to weigh the required tantalum powder, and pour the tantalum powder into a self-made powder mixer. Pour the prepared 5% stearic acid binder solution into the tantalum powder in 6 times, and use a spoon to assist stirring until the binder solution is added. Use a self-made powder mixer to stir, the temperature is 45°C, the speed is 40r / min, and the time is 60min. After stirring, cool to room temperature for use;
[0095] (2) Add the mixed tantalum powder into the CX-V automatic molding machine for molding, set the molding parameters of each test product on the molding machine and keep them consistent, and the molding density is 5.4g / cm 3 .
[0096] (3) Heat and remove the tantalum block of stearic acid in a vacuum pre-burning furnace, the heating rate is 10°C / min, the temperature is 500°C, the time is 2h, and the vacuum degree is ≤8×10 -3 Pa, after the end of the constant temperature, it was naturally cooled to room temperature and taken o...
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