Method for preparing high-performance cathode material for plasma ignition
A plasma and cathode material technology, applied in the field of silver-based cathode composite materials, can solve the problems of ablation, short service life, poor working stability, etc., and achieve good thermal conductivity, improved arc ablation resistance, and high density. Effect
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Embodiment 1
[0014] Ball milled for 30min and the powder was sintered by spark plasma at 500℃
[0015] Raw materials: Ag powder (200 mesh, 99.99%) 32.4g, rare earth oxide 0.49g (La 2 o 3 : CeO 2 : Y 2 o 3 =1:1:3)
[0016] After the above-mentioned raw material powders are fully mixed, put them into a stainless steel ball mill tank, add steel balls and alcohol, the ball-to-material ratio is 10:1, and then start the ball mill with a three-dimensional vibrating high-energy ball mill, and stop it every 15 minutes during the process to cool down the temperature. Check the machine. After grinding, the powder and balls were separated, and the powder was dried in a vacuum oven (70°C, 24 hours), and then passed through a 200-mesh sieve. Then the powder is sintered by SPS, the size is φ20×10, the sintering process is as follows: sintering temperature 500°C, pressure 30Mpa. Before 400°C, the heating rate was 100°C / min, after 400°C, it was heated to 500°C at 30°C / min, and kept for 8 minutes.
Embodiment 2
[0018] Ball milled powder for 30min and spark plasma sintering at 600℃
[0019] Raw materials: Ag powder (200 mesh, 99.99%) 27.28g, rare earth oxide 3.03g (La 2 o 3 : CeO 2 : Y 2 o 3 =1:1:3)
[0020] After the above-mentioned raw material powders are fully mixed, put them into a stainless steel ball mill tank, add steel balls and alcohol, the ball-to-material ratio is 10:1, and then start the ball mill with a three-dimensional vibrating high-energy ball mill, and stop it every 15 minutes during the process to cool down the temperature. Check the machine. After grinding, the powder and balls were separated, and the powder was dried in a vacuum oven (70°C, 24 hours), and then passed through a 200-mesh sieve. Then the powder is sintered by SPS, the size is φ20×10, the sintering process is as follows: sintering temperature 600°C, pressure 40Mpa. Before 500°C, the heating rate was 100°C / min, and after 500°C, it was heated to 600°C at 50°C / min, and kept for 10 minutes.
Embodiment 3
[0022] The powder was ball milled for 720min and sintered by spark plasma at 700℃
[0023] Raw materials: Ag powder (200 mesh, 99.99%) 50g, rare earth oxide CeO 2 2.02g
[0024] After the above-mentioned raw material powders are fully mixed, put them into a stainless steel ball mill tank, add steel balls and alcohol, the ball-to-material ratio is 10:1, and then use a planetary ball mill to start ball milling for 12 hours. After grinding, the powder and balls were separated, and the powder was dried in a vacuum oven (70°C, 24 hours), and then passed through a 200-mesh sieve. Then the powder is sintered by SPS, the size is Φ20×15, the sintering process is as follows: sintering temperature 700°C, pressure 35Mpa. Before 600°C, the heating rate is 100°C / min, after 600°C, it is heated to 700°C at 70°C / min, and kept for 15 minutes.
[0025] Example results:
[0026] After the above experiments, the specific performance of the cathode material is measured as follows:
[0027] 1) ...
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