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Microwave dielectric ceramic materials for electronic components and method for making same

A technology of microwave dielectric ceramics and electronic components, applied in ceramics, inorganic insulators and other directions, can solve the problems of large loss, expensive raw materials, poor temperature stability, etc. The effect of stable performance

Inactive Publication Date: 2005-11-02
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the field of medium and low dielectric microwave dielectric ceramics, the existing ceramic materials have large loss, poor temperature stability, or expensive raw materials

Method used

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  • Microwave dielectric ceramic materials for electronic components and method for making same
  • Microwave dielectric ceramic materials for electronic components and method for making same
  • Microwave dielectric ceramic materials for electronic components and method for making same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Using the analysis of soda magnesium carbonate, titanium dioxide, and zinc oxide as raw materials, according to the formula 42g of soda magnesium carbonate, 41g of titanium dioxide, and 17g of zinc oxide, after mixing these substances, use ZrO 2 The balls were added with deionized water and milled for 5 hours, dried in an electric oven at 120°C, passed through a 40-mesh sieve, and then pre-calcined at 1100-1250°C with a heating rate of 6°C / min and kept for 2 hours to obtain ( Mg 0.7 , Zn 0.3 ) 2 TiO 4 . Using calcium carbonate and titanium dioxide as raw materials, mix calcium carbonate 51g and titanium dioxide 49g according to the formula, and use ZrO 2 The balls were milled with deionized water for 5 hours, dried in an electric drying oven at 120°C, passed through a 40-mesh sieve, and then pre-fired at 1250°C with a heating rate of 6°C / min and kept for 2 hours to obtain CaTiO 3 . Will get (Mg 0.7 , Zn 0.3 ) 2 TiO 4 and CaTiO 3 According to the weight ratio ...

Embodiment 2

[0023] The formula of sample and preparation process are all identical with embodiment 1 conditions, just change between 0.5~0.9 (Mg x , Zn 1-x ) 2 TiO 4 -CaTiO 3 the x-value. That is to change the ratio of basic magnesium carbonate, titanium dioxide and zinc oxide in the raw materials. X=0.5, that is, the weight ratio of basic magnesium carbonate, titanium dioxide, zinc oxide is 37:46:17; X=0.6, that is, the weight ratio of basic magnesium carbonate, titanium dioxide, zinc oxide is 38:44:18; X= 0.7, that is, the weight ratio of basic magnesium carbonate, titanium dioxide, and zinc oxide is 41:40:19; X=0.8, that is, the weight ratio of basic magnesium carbonate, titanium dioxide, and zinc oxide is 44:36:20; X=0.9, That is, the weight ratio of basic magnesium carbonate, titanium dioxide and zinc oxide is 48:31:21. (Mg x , Zn 1-x ) 2 TiO 4The calcining temperature is 1210°C, and the sintering temperature is 1290°C. The measurement method of the obtained ceramic materi...

Embodiment 3

[0027] The formula of sample and preparation process are all identical with embodiment 1 condition, just change (Mg 0.7 , Zn 0.3 ) 2 TiO 4 and CaTiO 3 The weight ratio makes CaTiO 3 The percentage by weight of the compound varies in the range of 0 to 15%. That is, every 100g (Mg 0.7 , Zn 0.3 ) 2 TiO 4 Add CaTiO 3 The content varies between 0 and 15g. The calcining temperature is 1210°C, and the sintering temperature is 1290°C. The measurement method of the obtained ceramic material parameters is the same as that of Example 1. Table 6 shows the dielectric properties of the samples with CaTiO 3 The law of content change.

[0028]

[0029] As can be seen from Table 6, (Mg, Zn) 2 TiO 4 -CaTiO 3 Adding more CaTiO to dielectric ceramics 3 , can make ε and ρ v Significantly increased, tanδ increased significantly at the same time. Within the range given in the table, ρ v All in 10 13 Ω·cm or more.

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Abstract

The microwave electronic ceramic material for electronic element and device has the composition of (Mg, Zn)2TiO4-CaTiO3, and its (Mg, Zn)2TiO4 may be expressed in (Mgx, Zn1-x)2TiO4, with x being 0.5-0.9. The preparation process includes: mixing basic magnesium carbonate, titania and zinc oxide in certain proportion, ball milling, stoving, sieving and pre-sintering to obtain (Mg, Zn)2TiO4; mixing calcium carbonate and titania in certain proportion, ball milling, stoving, sieving and pre-sintering to obtain CaTiO3; mixing these two compounds in the ratio of 1 to 0-0.15, secondary ball milling, stoving, pelletizing, pressing to form and sintering to obtain the ceramic material. The microwave electronic ceramic material for electronic element and device has excellent microwave dielectric performance and low cost.

Description

technical field [0001] The invention relates to a ceramic material and a manufacturing method thereof, more specifically, a microwave dielectric ceramic material applied to electronic components and a manufacturing method thereof. Background technique [0002] Today, with the rapid development of the electronic industry, the integration and miniaturization of electronic information technology is promoting the development of electronic information products in the direction of thinning, miniaturization, digitalization, multi-function, high reliability and low cost. Microwave dielectric ceramics (MWDC) are a new type of functional electronic ceramics that have been developed rapidly in the past ten years. With their excellent microwave dielectric properties, they play a role in a series of circuits such as dielectric isolation, dielectric waveguide and dielectric resonance in microwave circuit systems. Features. Microwave dielectric ceramics have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/462
Inventor 吴顺华苏皓张志萍王国庆赵康健杨浩
Owner TIANJIN UNIV