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Voltage-sensitive ceramic powder and obtained piezoresistor

A technology of varistors and varistor ceramics, which is applied in the direction of capacitors, fixed capacitors, fixed capacitor dielectrics, etc., can solve the problem of high cost, and achieve the effects of uniform powder, good molding process, and low cost

Inactive Publication Date: 2016-02-24
广州创天电子科技有限公司
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Problems solved by technology

Traditional multilayer chip ceramic varistors mostly use Pd30% / Ag70% internal electrode paste, and the cost is high

Method used

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  • Voltage-sensitive ceramic powder and obtained piezoresistor

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Embodiment

[0011] A kind of pressure-sensitive ceramic powder, doping rare earth oxide into ZnO-Bi 2 o 3 The pressure-sensitive ceramic system is mixed, and the rare earth oxide is Y 2 o 3 Prepare according to the blending conditions in Table 1, then add absolute ethanol, toluene, dispersant, plasticizer, defoamer, adhesive and other ball milling dispersion, slurry and prepare raw film sheet by steel tape casting; According to the multi-layer chip ceramic component process, the internal electrode is printed, the thickness of the internal electrode is (1.0-2.0) μm, the green body is cut into a cuboid with a size of 1812, and the adhesive is deglued at 350°C in the air for 30 hours; then in an oxygen-enriched atmosphere Sintering at 950-1000°C for 2 hours; then chamfering, sealing, firing, and electroplating terminal electrodes to make a multilayer chip ceramic varistor. The conventional performance (varistor voltage V1mA, nonlinear coefficient a, leakage current IL, peak current Ip, en...

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Abstract

The invention relates to the technical fields of ceramic dielectric materials and obtained components and parts, and specifically discloses voltage-sensitive ceramic powder and an obtained piezoresistor. The voltage-sensitive ceramic powder is obtained by doping a rare earth oxide into a ZnO-Bi2O3 voltage-sensitive ceramic system; the rare earth oxide is at least one of Y2O3, Dy2O3, Ho2O3 or La2O3; the weight of the added oxide is (1-3)% of the total weight of the ZnO-Bi2O3 voltage-sensitive ceramic system; when the voltage-sensitive ceramic powder is used for manufacturing the piezoresistor, the multi-layer-chip ceramic piezoresistor with the varistor voltage V1m that can reach 1, 000 V is realized, and the ceramic piezoresistor can replace a corresponding wafer high voltage piezoresistor; and a silver-palladium alloy electrode with a low content of palladium is used as the inner electrode, so that the low manufacturing cost of the product is realized, and the obtained piezoresistor can be widely applied to civil electronic products having requirements on low cost.

Description

technical field [0001] The invention relates to a pressure-sensitive ceramic powder, in particular to a pressure-sensitive ceramic powder and a obtained pressure-sensitive resistor. Background technique [0002] Disc ceramic high-voltage varistors are bulky, not suitable for surface mount (SMT), and cannot meet the requirements of light and small modules and high-efficiency automation of production and assembly. The current mainstream of multilayer chip ceramic varistors is low-voltage products below 65V, and products with higher voltages require new technical support. Traditional multilayer chip ceramic varistors mostly use Pd30% / Ag70% internal electrode paste, and the cost is relatively high. Contents of the invention [0003] The technical problem solved by the invention is to provide an anti-reduction barium titanate ceramic dielectric material and the resulting high-voltage chip multilayer ceramic dielectric capacitor. [0004] In order to solve the above technical ...

Claims

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Application Information

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IPC IPC(8): H01G4/12C04B35/453
CPCH01G4/1209C04B35/453
Inventor 邝国威罗万先
Owner 广州创天电子科技有限公司
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