Temperature-stable X8R MLCC (multiplayer ceramic chip capacitor) medium material with low-temperature sintering effect

A dielectric material and low-temperature sintering technology, applied in the direction of fixed capacitor dielectrics, fixed capacitors, fixed capacitor parts, etc., can solve the problems of increased production costs, achieve good formability, good practical value and market prospects, and low loss Effect

Active Publication Date: 2018-05-29
BEIJING YUANLIU HONGYUAN ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the sintering temperature of most X8R temperature-stable MLCCs is not lower than 1150°C, and Ag-Pd electronic paste is required as the internal electrode (in which the palladium content is 30%-40%), and its production cost increases sharply due to the high palladium content

Method used

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  • Temperature-stable X8R MLCC (multiplayer ceramic chip capacitor) medium material with low-temperature sintering effect
  • Temperature-stable X8R MLCC (multiplayer ceramic chip capacitor) medium material with low-temperature sintering effect
  • Temperature-stable X8R MLCC (multiplayer ceramic chip capacitor) medium material with low-temperature sintering effect

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Embodiment 1

[0029] A temperature-stabilized X8R type MLCC dielectric material for low-temperature sintering is composed of main materials, auxiliary materials, modifiers and sintering aids. Among them, the main material BaTiO 3 Granularity D 50=0.60 μm, purity ≥99.8%.

[0030] Weigh analytically pure Bi according to the molar ratio of 1.01:1.01:4 2 o 3 、Na 2 CO 3 and TiO 2 , and using absolute ethanol as the medium, ball milled for 10 hours, dried at 80°C, ground and passed through a 120-mesh sieve, and calcined at 850°C for 2.5 hours to obtain Na 0.5 Bi 0.5 TiO 3 The powder is packaged and stored in a ziplock bag for later use.

[0031] Weigh analytically pure CaCO according to the molar ratio of 1:1 3 and TiO 2 , and using deionized water as the medium, ball milled for 8 hours, dried at 120°C, ground and passed through a 80-mesh sieve, and calcined at 1060°C for 3 hours to obtain CaTiO 3 The powder is packaged and stored in a ziplock bag for later use.

[0032] According to...

Embodiment 2

[0040] A temperature-stabilized X8R type MLCC dielectric material for low-temperature sintering is composed of main materials, auxiliary materials, modifiers and sintering aids. Among them, the main material BaTiO 3 Granularity D 50 =1.10m, purity ≥99.8%.

[0041] Weigh analytically pure Bi according to the molar ratio of 1.01:1.01:4 2 o 3 、Na 2 CO 3 and TiO 2 , and using absolute ethanol as the medium, ball milled for 10 hours, dried at 80°C, ground and passed through a 120-mesh sieve, and calcined at 850°C for 2.5 hours to obtain Na 0.5 Bi 0.5 TiO 3 The powder is packaged and stored in a ziplock bag for later use.

[0042] Weigh analytically pure CaCO according to the molar ratio of 1:1 3 and TiO 2 , and using deionized water as the medium, ball milled for 8 hours, dried at 120°C, ground and passed through a 80-mesh sieve, and calcined at 1060°C for 3 hours to obtain CaTiO 3 The powder is packaged and stored in a ziplock bag for later use.

[0043] According to ...

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Abstract

The invention discloses a temperature-stable X8R MLCC (multiplayer ceramic chip capacitor) medium material with low-temperature sintering effect. The temperature-stable X8R MLCC medium material is sintered by a main material, auxiliary materials, modifiers and a sintering additive, wherein the main material is BaTiO3 (barium titanate); the auxiliary materials comprise Na0.5Ni0.5TiO3 and CaTiO3 (calcium titanate); the modifiers comprise Nb2O5 (niobium pentoxide), MnCO3 (manganese carbonate), Co2O3 (cobalt oxide) and MgO (magnesium oxide). By adopting the technical scheme, the temperature-stableX8R MLCC medium material has the advantages that the dielectric property is good, the loss is lower, the insulation resistivity is higher, and the X8R temperature stability is good; the cost of the raw materials is low, the production technology is simple, the sintering technology is easy to control, the environment-friendly requirement is met, and the good application value and market prospect are realized.

Description

technical field [0001] The invention relates to the technical field of ceramic compositions, in particular to a low-temperature sintered temperature-stabilized X8R type MLCC dielectric material. Background technique [0002] At present, MLCC (Multi-layer Ceramic Capacitors, chip multilayer ceramic capacitors) is one of the most widely used passive electronic components in the modern electronics industry, and in the fields of aerospace, automotive industry, exploration and military mobile communications, it is necessary to withstand High-temperature MLCC, especially the automotive electronics market, has become an emerging demand field for global capacitor products, and the demand for high-temperature MLCC will continue to grow. [0003] According to the EIA standard of the International Electronics Industry Association, the X8R temperature stable MLCC refers to the capacity temperature change rate (TCC) ≤ ± 15% within the temperature range of -55°C to +150°C based on the cap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/622C04B35/63C04B35/64H01G4/12H01G4/30
CPCC04B35/468C04B35/622C04B35/6303C04B35/64C04B2235/3206C04B2235/3229C04B2235/3234C04B2235/3236C04B2235/3244C04B2235/3246C04B2235/3251C04B2235/3262C04B2235/3275C04B2235/96H01G4/1227H01G4/30
Inventor 杨魁勇程华容宋蓓蓓齐世顺刘佳翔孙淑英
Owner BEIJING YUANLIU HONGYUAN ELECTRONICS TECH
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