Anti-silver migration chip resistor positive electrode paste containing nickel-containing alloy powder
A front electrode and alloy powder technology, applied in the direction of resistance terminals/electrodes, conductive materials dispersed in non-conductive inorganic materials, etc., can solve problems such as silver migration
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Embodiment 1
[0089] In this embodiment, pastes 1-6 were prepared, the pastes were printed on an alumina substrate and fired to form a substrate, and a silver migration test was performed.
[0090] According to the formula listed in Table 1, the raw materials of the slurry were uniformly mixed and rolled with a three-roll mill to obtain the slurry 1-6. In Table 1, the Ca-Si-Al-B glass powder used is the glass powder 6 in Example 2, consisting of 13wt% aluminum oxide, 11wt% zinc oxide, 28wt% silicon oxide, 40wt% calcium oxide It is obtained by smelting at a high temperature of 1100° C. after being uniformly mixed with 8 wt % boron oxide raw materials.
[0091] The prepared slurry 1-6 is printed on a 96% alumina substrate (25mm long × 25mm wide × 1mm thick) by screen printing, and the printed pattern is as follows: figure 1 As shown, the electrode is 4mm long, 2mm wide, and the distance between the two electrodes is 1mm; dry at 150°C for 10 minutes, and then sinter in a belt sintering furnac...
Embodiment 2
[0097] According to the glass powder formula listed in Table 3, the raw materials of the glass powder were mixed evenly, and then smelted at a high temperature of 1100° C. to obtain glass powder 1-6.
[0098] Respectively glass powder 1-6, contrast glass powder (Asahi glass, brand AGC1370) and silver powder and organic vehicle are mixed evenly according to the proportioning of 5wt% glass powder, 70wt% silver powder and 25wt% organic vehicle, roll with three-roll mill, obtain Slurry 7-13; wherein, the organic vehicle is the organic vehicle 6 in Example 3, which is composed of 10wt% ethyl cellulose N4, 3wt% phospholipid and 87wt% terpineol.
[0099] The prepared slurry 7-13 is printed on a 96% alumina substrate (25mm long × 25mm wide × 1mm thick) by screen printing, and the printed pattern is as follows: figure 2As shown, dry at 150°C for 10 minutes, then sinter in a belt sintering furnace at a speed of 120mm / min at 850°C, sinter at the peak temperature for 10 minutes, and the ...
Embodiment 3
[0105] In this embodiment, according to the organic vehicle formula listed in Table 5, the components of the organic vehicle were uniformly mixed to obtain organic vehicles 1-7.
[0106] Organic vehicle 1-7 was mixed with glass powder 6 and silver powder in Example 2 according to the ratio of 27wt% organic vehicle, 3wt% glass powder and 70wt% silver powder, and rolled with a three-roll mill to obtain slurry 14- 20.
[0107] The prepared slurry 14-20 is printed on a 96% aluminum oxide substrate (25mm long * 25mm wide * 1mm thick) by screen printing, and the printed pattern is as follows: figure 2 As shown, dry at 150°C for 10 minutes, then sinter in a belt sintering furnace at a speed of 120mm / min at 850°C, sinter at the peak temperature for 10 minutes, and the total sintering time is 45 minutes to obtain a substrate. The substrates were observed with a metallographic microscope. Put the sintered photo under a metallographic microscope and magnify it 100 times to see if ther...
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Abstract
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