Unlock instant, AI-driven research and patent intelligence for your innovation.

Dielectric ceramic composition

A technology of dielectric ceramics and compositions, which is applied in the field of dielectric ceramic compositions with high dielectric constants, can solve the problems of reducing the sensitivity of dielectric constants, excessive variation of dielectric constants, etc., and overcome low yields problem, improve the effect of excessive variation

Inactive Publication Date: 2013-08-21
CHINA STEEL
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Therefore, an object of the present invention is to provide a dielectric ceramic composition, control the addition ratio of the main component and the auxiliary component, reduce the sensitivity of the dielectric constant with the increase of the sintering temperature, and can significantly improve the dielectric constant caused by the sintering temperature. The problem of too much variation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Main components: the total weight is 100 parts by weight of the starting materials of the aforementioned dielectric ceramic composition.

[0031] Sintering additives: 0.2 parts by weight of niobium pentoxide, 1.0 parts by weight of bismuth trioxide, 0.4 parts by weight of manganese dioxide, 0.8 parts by weight of silicon dioxide and 0.2 parts by weight of diyttrium trioxide.

[0032] Steps: The experimental operation of Example 1 is the same as that of Comparative Example 1, the only difference being that the sintering additive used in Example 1 also includes silicon dioxide and diyttrium trioxide. Finally, it is coated on the dedicated electrode of ceramic capacitor and fired (800°C). The measured dielectric constant is between 9400 and 9600. As the sintering temperature increases, the variation of the dielectric constant does not change much, and the maximum variation is about 200.

Embodiment 2

[0034] Main components: the total weight is 100 parts by weight of the starting materials of the aforementioned dielectric ceramic composition.

[0035]Sintering additives: 0.01 parts by weight of niobium pentoxide, 0.2 parts by weight of bismuth trioxide, 0.01 parts by weight of manganese dioxide, 0.01 parts by weight of silicon dioxide and 0.1 parts by weight of diyttrium trioxide.

[0036] Steps: The experimental operation of Example 2 is the same as that of Comparative Example 1, the only difference being that the sintering additive used in Example 2 also includes silicon dioxide and diyttrium trioxide. Finally, it is coated on the special electrode of ceramic capacitor and fired (800°C), and the measured dielectric constant is between 9000 and 9200. As the sintering temperature increases, the variation of the dielectric constant does not change much, and the maximum variation is about 200.

Embodiment 3

[0038] Main components: the total weight is 100 parts by weight of the starting materials of the aforementioned dielectric ceramic composition.

[0039] Sintering additives: 0.8 parts by weight of niobium pentoxide, 1.2 parts by weight of bismuth trioxide, 0.5 parts by weight of manganese dioxide, 1.00 parts by weight of silicon dioxide and 1.00 parts by weight of diyttrium trioxide.

[0040] Steps: The experimental operation of Example 2 is the same as that of Comparative Example 1, the only difference being that the sintering additive used in Example 2 also includes silicon dioxide and diyttrium trioxide. Finally, it is coated on the dedicated electrode of ceramic capacitor and fired (800°C). The measured dielectric constant is between 10800 and 11000. As the sintering temperature increases, the variation of the dielectric constant does not change much, and the maximum variation is about 200.

[0041] It can be seen that the dielectric ceramic composition of the embodiment ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a dielectric ceramic composition, which comprises barium titanate (BaTiO3), barium zirconate (BaZrO3), strontium titanate (SrTiO3), calcium titanate (CaTiO3), calcium zirconate (CaZrO3) and a sintering additive. The sintering additive comprises niobium pentaoxide (Nb2O5), bismuth trioxide (Bi2O3), manganese dioxide (MnO2), silicon dioxide (SiO2) and yttrium sesquioxide (Y2O3). After the dielectric ceramic composition is sintered, the dielectric constant range is 9,000 to 11,000.

Description

technical field [0001] The present invention relates to a dielectric ceramic composition, and more particularly to a dielectric ceramic composition having a high dielectric constant. Background technique [0002] With the advancement of wireless communication technology, the demand for portable mobile communication products has also increased significantly, and is developing towards thinner and smaller size, high reliability and low price, so as to meet the requirements of miniaturization and lightweight high-density construction. Since wireless communication products use microwaves to transmit signals, the ceramic materials used must have a high dielectric constant (εr) and a high quality factor (Q×f) at room temperature. [0003] In China Taiwan Patent Publication No. 373201, a dielectric ceramic composition is disclosed, comprising (BaCa)TiO 3 As the main component, manganese carbonate (MnCO 3 ), dysprosium trioxide (Dy 2 o 3 ), niobium pentoxide (Nb 2 o 5 ) as a se...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/49
Inventor 翁丁财詹镇锋谢慧霖
Owner CHINA STEEL