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Microwave ceramic composition having anti-reduction characteristic, and microwave ceramic material thereof

A technology of microwave ceramics and components, applied in the field of microwave ceramic materials, can solve the problems of reducing the quality factor of dielectric ceramic materials and achieve the effect of low dielectric constant

Active Publication Date: 2015-06-24
DONGGUAN HUAKE ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the extremely low oxygen content (less than 1%) in the reducing atmosphere, the dielectric ceramic material is prone to reduction in the reducing atmosphere, which causes the semiconducting effect of the ceramic material and reduces the quality factor of the dielectric ceramic material.

Method used

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  • Microwave ceramic composition having anti-reduction characteristic, and microwave ceramic material thereof
  • Microwave ceramic composition having anti-reduction characteristic, and microwave ceramic material thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1 Microwave Ceramic Material Comprising Zinc Oxide Addition

[0027] First, various pyroxene glass-ceramic materials with different phase structures are prepared by mixing at least two kinds of magnesium oxide (MgO), calcium oxide (CaO) and silicon dioxide (SiO 2 ) and other oxide powders, and formed after sintering at a temperature of 900 ° C, respectively CaSiO 3 (wollastonite), Ca 3 MgSi 2 o 8 (Rhodoxite), Ca 2 MgSi 2 o 7 (Akermanite) or CaMgSi 2 o 6 (diopside).

[0028]Then, taking the total amount of pyroxene glass-ceramic powder and zinc oxide powder as 100 mole percent, respectively take 3.5 to 6.5 mole percent (mole %), 7 to 10 mole percent (mole %), and 10.5 to 13.5 mole percent (mole percent) respectively. %) of zinc oxide powder, added to CaMgSi 2 o 6 Pyroxene glass-ceramic materials and mixed.

[0029] Afterwards, the sintering is continued for 2 hours at a sintering temperature of 900° C. in a nitrogen atmosphere to obtain the microwave ...

Embodiment 2

[0030] Example 2 Microwave Ceramic Material Containing Alumina Addition Components

[0031] In this embodiment, the microwave ceramic material containing alumina added components is prepared by the method of the above-mentioned embodiment 1. Pyroxene glass-ceramic material, and respectively take 3.5 to 6.5 mole percent (mole%), 7 to 10 mole percent (mole% ), 10.5 to 13.5 mole percent (mole%) of alumina powder to replace zinc oxide powder, to be added to CaMgSi 2 o 6 Pyroxene glass-ceramic materials and mixed.

[0032] Afterwards, the sintering is continued for 2 hours at a sintering temperature of 900° C. in a nitrogen atmosphere to obtain the microwave ceramic material of the present invention. Among them, the addition ratio of different alumina powders and the quality factor of the microwave ceramic material obtained after sintering at low sintering temperature and reducing atmosphere are shown in the above table 1, and the dielectric constant of the microwave ceramic mate...

Embodiment 3

[0033] Example 3 Microwave Ceramic Material Comprising Sodium Oxide Addition

[0034] The microwave ceramic material containing sodium oxide added components of this embodiment is to prepare the pyroxene glass-ceramic material according to the method of the above-mentioned embodiment 1, and respectively take 3.5 to 6.5 mole percent (mole%), 7 to 10 mole percent (mole%) %), 10.5 to 13.5 mole percent (mole%) of sodium oxide powder to replace zinc oxide powder, be added to CaMgSi 2 o 6 Pyroxene glass-ceramic materials and mixed.

[0035] Afterwards, the sintering is continued for 2 hours at a sintering temperature of 900° C. in a nitrogen atmosphere to obtain the microwave ceramic material of the present invention. Among them, the addition ratio of different sodium oxide powders and the quality factor of the microwave ceramic material after sintering at low sintering temperature and reducing atmosphere are shown in the above table 1, and the dielectric constant of the microwave...

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Abstract

The invention provides a microwave ceramic composition having an anti-reduction characteristic. The composition comprises: a glass ceramic material having a structural formula of CaxMgySizO(x+y+2z), wherein each of x, y and z is 0-50mol%; and at least one addition component, such as aluminum oxide (Al2O3), zinc oxide (ZnO) or sodium oxide (Na2O). The microwave ceramic composition having an anti-reduction characteristic can be sintered together with a base metal in a reduction atmosphere in order to reduce the manufacturing cost. The invention also provides a microwave ceramic material prepared through sintering at a low sintering temperature in a reduction atmosphere. The microwave ceramic material has a high quality factor, a low dielectric constant and a high application value.

Description

technical field [0001] The invention relates to a microwave ceramic composition with anti-reduction properties, and a microwave ceramic material with low dielectric constant and high quality factor after sintering at low sintering temperature and reducing atmosphere. Background technique [0002] With the vigorous development of the IC integrated industry, multilayer ceramic capacitors have the advantages of improving industrial utilization due to their miniaturization, lightness, high capacity, and high quality. Among them, the multilayer ceramic capacitor is a ceramic sintered body formed by stacking and co-firing blank strips formed of dielectric ceramic materials and internal electrode metal paste. [0003] However, the sintering temperature of general dielectric ceramic materials almost exceeds the melting point of base metal elements such as nickel or copper (the melting point of copper metal is about 1100 ° C), and the oxygen content in the atmosphere is relatively hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/04
Inventor 周振嘉冯奎智刘赜铭朱立文庄朝栋
Owner DONGGUAN HUAKE ELECTRONICS
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