Process for preparing silumin electronic package materials
An electronic packaging material, high-silicon aluminum alloy technology, applied in the direction of circuits, electrical components, electrical solid devices, etc., can solve the problems of increased component failure rate, increased heating rate, increased circuit operating temperature, etc., to achieve improved bonding state , low thermal expansion coefficient, and improved thermal conductivity
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Embodiment 1
[0018] A) Powder preparation
[0019] Industrial pure aluminum and high-purity silicon are smelted in an induction furnace according to the mass percentage of 8.8:1.2, the temperature is raised to 750 ° C, fully stirred, and the flux (30% NaCl + 47% KCl + 23% cryolite) is used to cover and slag, and use Hexachloroethane (C 2 Cl 6 ) outgassing. The metal droplets are injected into the spray device through the leak nozzle, and the metal droplets atomized by high-pressure nitrogen gas are directly sprayed into the high-pressure water flow about 200mm away from the nozzle. After cooling, the water containing Al-Si alloy powder flows through the screen and leaks. The debris is flowed into a high-speed rotating drier for dehydration treatment, and the required Al-12Si alloy powder is obtained through drying and sieving. The powder-making process parameters are attached in Table 1.
[0020] Melting temperature
(℃)
(h)
Nozzle aperture
(m...
Embodiment 2
[0028] A) Powder preparation
[0029] Industrial pure aluminum and high-purity silicon are smelted in an induction furnace according to the mass percentage of 8:2, and the temperature is raised to 900, fully stirred, covered with flux (30% NaCl+47% KCl+23% cryolite) to form slag, and six Ethyl chloride (C 2 Cl 6 ) outgassing. The metal droplets are injected into the spray device through the leak nozzle, and the metal droplets atomized by high-pressure nitrogen gas are directly sprayed into the high-pressure water flow about 200mm away from the nozzle. After cooling, the water containing Al-Si alloy powder flows through the screen and leaks. The debris is flowed into a high-speed rotating drier for dehydration treatment, and the required Al-20Si alloy powder is obtained after drying and sieving. The powder-making process parameters are attached in Table 2.
[0030] Melting temperature
(℃)
(h)
Nozzle aperture
(mm)
atomizing gas...
Embodiment 3
[0038] A) Powder preparation
[0039] Industrial pure aluminum and high-purity silicon are smelted in an induction furnace according to the mass percentage of 7.4:2.6, heated to 1050, fully stirred, covered with flux (30% NaCl + 47% KCl + 23% cryolite), and used six Ethyl chloride (C 2 Cl 6) outgassing. The metal droplets are injected into the spray device through the leak nozzle, and the metal droplets atomized by high-pressure nitrogen gas are directly sprayed into the high-pressure water flow about 200mm away from the nozzle. After cooling, the water containing Al-Si alloy powder flows through the screen and leaks. The debris is flowed into a high-speed rotating drier for dehydration treatment, and the required Al-26Si alloy powder is obtained after drying and sieving. The powder-making process parameters are attached in Table 3.
[0040] Melting temperature
(℃)
(h)
Nozzle aperture
(mm)
atomizing gas
g...
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