Method for detecting surface oxidation degree of aluminum powder
A technology of surface oxidation and detection method, applied in measuring devices, instruments, scientific instruments, etc., can solve the problems that the active aluminum content cannot be equal to the degree of surface oxidation of aluminum powder, affect the effect of sintering and bonding of aluminum powder, and the sintering effect is poor. Avoid powder removal, stable test results, good monitoring effect
Pending Publication Date: 2020-05-01
YIDU DONGYANGGUANG FORMED FOIL
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Problems solved by technology
[0002] At present, the national standard of aluminum powder does not involve the evaluation of the surface oxidation degree of aluminum powder, only the test of active aluminum content, but the active aluminum content cannot be equal to the surface oxidation degree of aluminum powder
The aluminum powder is basically spherical, and the spherical aluminum powder is reconnected by sintering to form a three-dimensional pore structure, but the degree of oxidation on the surface of the aluminum powder greatly affects the effect of the sintering connection of the aluminum powder, and the degree of oxidation on the surface of the aluminum powder is relatively high , the sintering effect is poor, resulting in powder removal
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Embodiment 1
[0031] Ultrasonic clean the aluminum powder in petroleum ether for 5 minutes, then dry it in an oven at 105°C for 3 hours, and transfer it to a desiccator for standby; take 0.05g of aluminum powder, put it in a tin capsule, put it into the feeding port, and use a double-layer graphite sleeve The crucible is a heating vessel, and the heating power is set to 4.5kW for testing.
[0032] The test was repeated 3 times in parallel, and 2 significant figures were reserved. The results are shown in Table 1.
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The invention provides a method for detecting surface oxidation degree of aluminum powder. The invention comprises the steps of (1) degreasing and drying aluminum powder to obtain pretreated aluminumpowder; and (2) adding the pretreated aluminum powder into a fluxing agent, then putting the fluxing agent into a heating container and testing the fluxing agent by using an oxygen and nitrogen analyzer. According to the testing method, a double-layer graphite-covered crucible is selected as the heating container, so that the test result is accurate and stable. Through the testing result, the oxidation degree of the aluminum powder can be better monitored, thereby avoiding the shedding phenomenon of the aluminum powder after being sintered.
Description
technical field [0001] The invention relates to a method for detecting the oxidation degree of the surface of aluminum powder, in particular to a method for detecting the oxidation degree of the surface of aluminum powder by using an oxygen and nitrogen analyzer. Background technique [0002] At present, the national standard of aluminum powder does not involve the evaluation of the surface oxidation degree of aluminum powder, only the test of active aluminum content, but the active aluminum content cannot be equal to the surface oxidation degree of aluminum powder. The aluminum powder is basically spherical, and the spherical aluminum powder is reconnected by sintering to form a three-dimensional pore structure, but the degree of oxidation on the surface of the aluminum powder greatly affects the effect of the sintering connection of the aluminum powder, and the degree of oxidation on the surface of the aluminum powder is relatively high , the sintering effect is poor, resu...
Claims
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Login to View More IPC IPC(8): G01N25/00
CPCG01N25/00
Inventor 徐玲玲周政杨远博罗磊
Owner YIDU DONGYANGGUANG FORMED FOIL