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Ceramic capacity medium with low consumption and high pressure resisting and preparation process thereof

A ceramic capacitor, high withstand voltage technology, applied in the direction of fixed capacitor dielectric, ceramics, fixed capacitor parts, etc., to achieve high breakdown strength, reduced loss, and good development prospects

Inactive Publication Date: 2006-06-28
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to use barium titanate as the basis of BaTiO 3 -NiO-Nb 2 o 5 On the basis of the ternary ceramic capacitor dielectric material, it is further improved to provide a ceramic capacitor dielectric with low loss, high withstand voltage, and low sintering temperature and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) First select the chemical reagents NiO and MnCO of analytical grade (99.9%) 3 and Nb 2 o 5 , by weight ratio Nb 2 o 5 9.96g and NiO 0.04g, Nb 2 o 5 9.92g and MnCO 3 0.08g, weigh and mix with electronic balance respectively, through 250 holes / cm 2 Separate sample sieves, calcined at 800°C and 900°C respectively, ball milled and dried to obtain precursor niobium-nickel compounds and niobium-manganese compounds;

[0017] (2) According to the composition of Table 1, after fully mixing, melting and quenching, grinding, passing through 6000 holes / cm 2 Sampling sieve to obtain glass powder a, b, c.

[0018] Composition code

Bi 2 o 3

Pb 3 o 4

ZnO

h 3 BO 3

total

a

25

25

30

20

100

b

35

15

40

10

100

c

30

20

35

15

100

[0019] (3) Take the pre-burned BaTiO 3 100g, add niobium nickel compound 0....

Embodiment 2

[0022] By weight: Nb 2 o 5 9.98g and NiO 0.02g, Nb 2 o 5 9.96g and MnCO 3 For the composition of 0.04g, refer to step (1) of Example 1 to prepare the precursor niobium-nickel compound and niobium-manganese compound, wherein the calcination temperatures of the niobium-nickel compound and the niobium-manganese compound are 900° C. and 1000° C. respectively.

[0023] Take pre-burned BaTiO 3 100g, add the above niobium nickel compound 1.5g, niobium manganese compound 0.2g, MnCO 3 1g, glass powder b, 4g ingredients, its composition code is B, the raw materials are ball milled for 5 hours, 6g of paraffin wax is added to granulate, and the pressed disc green body is dewaxed in an electric furnace for 3 hours to 600°C for 0.5 hours, and then Heating to 1125-1135° C. for 3 hours and firing. Other process steps and sample electrode preparation are the same as in Example 1.

Embodiment 3

[0025] By weight: Nb 2 o 5 9.97g and NiO 0.03g, Nb 2 o 5 9.97g and MnCO 3 For the composition of 0.03g, refer to the step (1) of Example 1 to prepare the precursor niobium-nickel compound and niobium-manganese compound, wherein the calcination temperatures of the niobium-nickel compound and the niobium-manganese compound are 1000° C. and 900° C. respectively.

[0026] Take pre-burned BaTiO 3 100g, add the above niobium nickel compound 1g, niobium manganese compound 0.1g, MnCO 3 0.25g, glass powder c 5g ingredients, its composition code is C, the raw materials are ball milled for 5 hours, 7g of paraffin wax is added to granulate, and the pressed disc green body is dewaxed in an electric furnace for 4 hours to 500°C for 1 hour, other The process steps and sample electrode preparation are the same as in Example 1.

[0027] In the sintering step of the formulations A, B, and C of the above examples, three dry-pressed green bodies with different formulations can be taken...

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PUM

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Abstract

The invention discloses a low power consumption high withstand voltage ceramic capacitor medium. Considering the weight of BaTiO3 is 1, adding 0.5-1.2% niobium nickel compound, 0.1-0.3% niobium manganese compound, 0.25-1% MnCO3 and 4-5% glass powder. The process includes the following steps: mixing niobium nickel compound and niobium manganese compound, taking ball milling, drying, graining, pressing into disc shape green compact, sintering in 1125-1135 degree centigrade, keeping temperature for 2-4 hours. The ceramic capacitors have the features of low power consumption, and high withstand voltage.

Description

technical field [0001] The invention relates to a ceramic composition, in particular to a barium titanate-based ceramic capacitor medium and a preparation method thereof. Background technique [0002] In recent years, extensive research has been carried out on X7R ceramic capacitor dielectric materials at home and abroad (X represents the low temperature limit of the working temperature range -55°C, 7 represents the high temperature limit of the working temperature range +125°C, R represents all The rate of change of the capacitance at the temperature point relative to room temperature at 25°C is less than or equal to ±15%), where BaTiO 3 The production and application of the based ceramic materials will not pollute the environment, and the prepared ceramics have excellent and stable dielectric properties, so they have been highly concerned by people and have developed rapidly. However, in some fields, such as military and aerospace technology applications, the X7R series c...

Claims

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Application Information

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IPC IPC(8): C04B35/468C04B35/622H01B3/12H01G4/12
Inventor 李玲霞明翠孙晓东王大鹏王洪儒
Owner TIANJIN UNIV