Zinc oxide resistor disc and preparation method thereof
A zinc oxide resistor sheet, zinc oxide technology, applied in the direction of varistor, varistor core, etc., can solve the problems of development lag, technology blockade, etc., achieve low equipment requirements, high energy density, easy mass production Effect
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Embodiment 1
[0044] 1. The raw material formula is as follows: 96.30mol% ZnO, 1.00mol% Bi 2 o 3 , 1.00mol% Sb 2 o 3 , 0.50mol% Cr 2 o 3 , 0.50mol% Co 2 o 3 , 0.50mol% MnO 2 , 0.10mol% Y 2 o 3 and 0.10mol% Al 2 o 3 .
[0045] Wherein, 96.30mol% of ZnO includes: 20mol% of 500nm particles; 55mol% of 90nm particles; 21.30mol% of 30nm particles.
[0046] 2. Preparation method
[0047] 1. Dry the above oxides at 80°C for 24 hours, then weigh them in proportion, add them to a planetary ball mill, use ethanol as the medium, and ZrO 2 The ball is abrasive, 400 rpm -1 , ball milling for 6h;
[0048] 2. Dry the slurry after ball milling at 80°C for 36 hours to remove ethanol;
[0049] 3. Add a 4wt% PVA binder aqueous solution of 10% of the total powder mass to the dried mixed oxide, and seal and stale for 24 hours;
[0050] 4. The stale mixed oxide is molded into a disc-shaped green body with a diameter of 30mm and a thickness of 3.0mm under 100MPa;
[0051] 5. These blanks were dri...
Embodiment 2
[0056] 1. The raw material formula is as follows: 94.6mol% ZnO, 1.0mol% Bi 2 o 3 ,1.0mol%Sb 2 o 3 ,1.0mol% Co 2 o 3 ,1.0mol% SiO 2 ,0.5mol%MnO 2 ,0.5mol%Cr 2 o 3 , 0.40mol% Ga 2 o 3 .
[0057] Wherein, 94.6mol% of ZnO includes: 30mol% of 500 micron particles; 40mol% of 90nm particles; 24.60mol% of 30nm particles.
[0058] 2. Preparation method
[0059] 1. Dry the above oxides at 80°C for 24 hours to constant weight, then weigh them in proportion, add them to a planetary ball mill, use ethanol as the medium, ZrO 2 The ball is abrasive, 400 rpm -1 , ball milling for 6h;
[0060] 2. After ball milling, dry the slurry at 80°C for 36 hours to constant weight to remove ethanol;
[0061] 3. Add a 4wt% PVA binder aqueous solution of 20% of the total powder mass to the dried mixed oxide, and seal and stale for 24 hours;
[0062] 4. The stale mixed oxide is molded into a disc-shaped green body with a diameter of 40mm and a thickness of 3.0mm under 100MPa;
[0063] 5. Dr...
Embodiment 3
[0068] 1. The raw material formula is as follows: ZnO 95.41mol%; Bi 2 o 3 1.30mol%; Sb 2 o 3 1.50mol%; MnO 2 0.75mol%; Co 3 o 4 0.60mol%; Ni 2 o 3 0.40mol%; Al 2 o 3 0.04 mol%.
[0069] Among them, 95.41mol% of ZnO includes: 40mol% of 500 micron particles, 35mol% of 90nm particles, and 20.41mol% of 30nm particles.
[0070] 2. Preparation method
[0071] 1. Dry the above-mentioned substances at 80°C for 24 hours to constant weight, then weigh them in proportion, add them to a planetary ball mill, use ethanol as the medium, ZrO 2 The ball is abrasive, 400 rpm -1 , ball milling for 6h;
[0072] 2. Dry the slurry after ball milling at 70°C to constant weight for 48 hours to remove ethanol;
[0073] 3. Add a 4wt% PVA binder aqueous solution of 15% of the total powder mass to the dried mixed oxide, and seal and stale for 24 hours;
[0074] 4. The stale mixed oxide is molded into a disc-shaped green body with a diameter of 60mm and a thickness of 3.0mm under 100MP...
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