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Microwave dialect ceramic material and preparation method thereof

A technology of microwave dielectric ceramics and high dielectric materials, applied in the field of dielectric ceramic materials, can solve the problems of poor temperature stability, low dielectric constant, etc. simple effect

Inactive Publication Date: 2013-04-03
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is: provide a kind of composite modified (Mg 0.8 Zn 0.2 )TiO 3 Microwave dielectric ceramic material, in order to overcome the disadvantages of poor temperature stability and low dielectric constant of the current microwave dielectric ceramic material, and also provide the preparation method of the microwave dielectric ceramic material, in order to obtain close to zero temperature coefficient, high dielectric constant Electric constant of microwave dielectric ceramics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: (1-m){(Mg 0.8 Zn 0.2 )TiO 3}·m{Ba 4 Nd 28 / 3 Ti 18 o 54 ·zBi 2 o 3}Preparation of microwave dielectric ceramics

[0032] The composition of the microwave dielectric ceramic is as shown in Example 1 in Table 1, and the specific preparation method includes the following steps:

[0033] (1) Take (MgCO 3 ) 4 ·Mg(OH) 2 ·5H 2 O, ZnO, TiO 2 As a raw material, it was ball-milled in distilled water for 20 hours, dried, and pressed into tablets.

[0034] (2) At a heating rate of 5°C / min, at a pre-burning temperature of 1100°C for 4 hours, synthesize (Mg 0.8 Zn 0.2 ) TiO 3 .

[0035] (3) Weigh BaCO according to the ratio of z=0.12 in Example 1 of Table 1 3 、Nd 2 o 3 、 Bi 2 o 3 、TiO 2 、 Bi 2 o 3 , ball milled in distilled water for 20h, dried, and pressed into tablets.

[0036] (4) Ba 4 Nd 28 / 3 Ti 18 o 54 0.12Bi 2 o 3 .

[0037] (5) Mix (1-m) {(Mg 0.8 Zn 0.2 )TiO 3}·m{Ba 4 Nd 28 / 3 Ti 18 o 54 ·zBi 2 o 3}, wet grinding for 24 ho...

Embodiment 2

[0040] Embodiment 2: (1-m) {(Mg 0.8 Zn 0.2 )TiO 3}·m{Ba 4 Nd 28 / 3 Ti 18 o 54 ·zBi 2 o 3}Preparation of microwave dielectric ceramics

[0041] The composition of the microwave dielectric ceramic is as shown in Example 2 in Table 1, and the specific preparation method includes the following steps:

[0042] (1) Take (MgCO 3 ) 4 ·Mg(OH) 2 ·5H 2 O, ZnO, TiO 2 As a raw material, it was ball-milled in distilled water for 21 hours, dried, and pressed into tablets.

[0043] (2) At a heating rate of 5°C / min, at a pre-burning temperature of 1110°C for a holding time of 4h, synthesize (Mg 0.8 Zn 0.2 ) TiO 3 .

[0044] (3) Weigh BaCO according to the ratio of z=0.15 in Example 2 of Table 1 3 、Nd 2 o 3 、 Bi 2 o 3 、TiO 2 、 Bi 2 o 3 , dried by ball milling in distilled water for 21 hours, and pressed into tablets.

[0045] (4) Ba 4 Nd 28 / 3 Ti 18 o 54 0.12Bi 2 o 3 .

[0046] (5) Match (1-m) {(Mg 0.8 Zn 0.2 )TiO 3}·m{Ba 4 Nd 28 / 3 Ti 18 o 54 ·zBi 2 o 3}...

Embodiment 3

[0049] Embodiment 3: (1-m){(Mg 0.8 Zn 0.2 )TiO 3}·m{Ba 4 Nd 28 / 3 Ti 18 o 54 ·zBi 2 o 3}Preparation of microwave dielectric ceramics

[0050] The composition of the microwave dielectric ceramic is as shown in Example 3 in Table 1, and the specific preparation method includes the following steps:

[0051] (1) Take (MgCO 3 ) 4 ·Mg(OH) 2 ·5H 2 O, ZnO, TiO 2 As a raw material, it was ball-milled in distilled water for 22 hours, dried, and pressed into tablets.

[0052] (2) At a heating rate of 5°C / min, at a pre-calcination temperature of 1120°C for a holding time of 4h, synthesize (Mg 0.8 Zn 0.2 ) TiO 3 .

[0053] (3) Weigh BaCO according to the ratio of z=0.18 in Example 3 of Table 1 3 、Nd 2 o 3 、 Bi 2 o 3 、TiO 2 、 Bi 2 o 3 , ball milled in distilled water for 22 hours, dried, and pressed into tablets.

[0054] (4) Ba 4 Nd 28 / 3 Ti 18 o 54 0.12Bi 2 o 3 .

[0055] (5) Mix (1-m) {(Mg 0.8 Zn 0.2 )TiO 3}·m{Ba 4 Nd 28 / 3 Ti 18 o 54 ·zBi 2 o 3} W...

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Abstract

The invention relates to a microwave dialect ceramic material based on (Mg0.8Zn0.2)TiO3 microwave dialect ceramics and formed by adding high dielectric material Ba4Nd28 / 3Ti18O54.zBi2O3. The microwave dialect ceramic material comprises the components by molar part ratio as follows: (MgCO3)4.Mg(OH)2.5H2O 8-14.4:ZnO 10-18:BaCO3 20-40:Nd2O3 45.3-238.5:Bi2O3 0.6-4.5:TiO2 270-950, wherein the molar weight of TiO2 in (Mg0.8Zn0.2)TiO3 is 50-90 parts, and the molar weight of TiO2 in Ba4Nd28 / 3Ti18O54.zBi2O3 is 180-900 parts. According to the invention, the dielectric property is excellent, the preparation technology is simple, toxicity is avoided, pollution to the environment is avoided, and large-scale industrial production is facilitated.

Description

technical field [0001] The invention belongs to the field of dielectric ceramic materials, in particular to a composite modified (Mg 0.8 Zn 0.2 ) TiO 3 Microwave dielectric ceramic material and its preparation method. Background technique [0002] Microwave Dielect Ceramics (MWDC for short) is a kind of dielectric material used in the microwave frequency band. Under the external electric field, the internal polarization of the material changes, and the electrical energy is transmitted and stored in an inductive manner. With its excellent microwave dielectric properties, it plays a series of circuit functions such as dielectric isolation, dielectric waveguide and dielectric resonance in microwave circuit systems, and promotes the miniaturization, integration and high-quality of microwave circuits. [0003] In recent years, microwave communication systems such as portable mobile phones, car phones, satellite direct TV, global positioning system (GPS) and military guidance s...

Claims

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Application Information

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IPC IPC(8): C04B35/462C04B35/622
Inventor 吉晓莉翟成成
Owner WUHAN UNIV OF TECH