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A low-loss zinc-zirconium-niobium series microwave dielectric ceramic prepared by reaction sintering method

A technology of microwave dielectric ceramics and sintering method, which is applied in the field of preparation of low-loss zinc-zirconium-niobium series microwave dielectric ceramics by reaction sintering method and its preparation field. Lower sintering temperature, simple preparation process, and cost-saving effects

Inactive Publication Date: 2018-01-30
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] ZnZrNb with wolframite structure 2 o 8 The microwave dielectric ceramic is a new type of low-loss microwave dielectric ceramic that has just been developed recently. It has excellent microwave dielectric properties. Its sintering temperature is as high as 1250°C
At present, most of its preparation methods are traditional solid-phase method, but the experimental process of traditional solid-phase method is generally cumbersome, and it is difficult to prepare ZnZrNb with high Q value under the condition of high efficiency and energy saving. 2 o 8 microwave dielectric ceramics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. According to the zinc-zirconium-niobium microwave dielectric ceramic component ZnZrNb 2 o 8 , Weigh ZnO-3.4603g, ZrO 2 -5.2388g, Nb 2 o 5 -11.3009g ingredients, 20g in total; put the mixed powder into the polyester tank, add 160ml of deionized water and 150g of zirconium balls, and ball mill on a planetary ball mill for 10 hours, the speed of the ball mill is 1000 rpm;

[0025] 2. Put the ball-milled raw material in a drying oven, dry at 120°C and pass through a 40-mesh sieve to obtain a powder with uniform particles;

[0026] 3. Add 6% paraffin wax to the sieved powder as a binder for granulation, and pass through a 80-mesh sieve; then use a powder tablet press with a pressure of 7MPa to press it into a shape with a diameter of 10mm and a thickness of 5mm. body;

[0027] 4. Sinter the green body at 1125°C and keep it warm for 4 hours to obtain microwave dielectric zinc-zirconium-niobium ceramics;

[0028] Finally, the microwave characteristics of the obtained ...

Embodiment 2

[0030] 1. According to the microwave dielectric ceramic composition ZnZrNb 2 o 8 , Weigh ZnO-3.4603g, ZrO 2 -5.2388g, Nb 2 o 5 -11. 3009g of ingredients, 20g in total; the mixed powder was added to a polyester tank, after adding 160ml of deionized water and 150g of zirconium balls, ball milled on a planetary ball mill for 10 hours, and the speed of the ball mill was 1000 rpm;

[0031] 2. Put the ball-milled raw material in a drying oven, dry at 120°C and pass through a 40-mesh sieve to obtain a powder with uniform particles;

[0032] 3. Add 6% paraffin wax to the sieved powder as a binder for granulation, and pass through a 80-mesh sieve; then use a powder tablet press with a pressure of 7MPa to press it into a shape with a diameter of 10mm and a thickness of 5mm. body;

[0033] 4. Sinter the green body at 1150°C and keep it warm for 4 hours to obtain microwave dielectric zinc-zirconium-niobium ceramics;

[0034] Finally, the microwave characteristics of the obtained sam...

Embodiment 3

[0036] 1. According to the microwave dielectric ceramic composition ZnZrNb 2 o 8 , Weigh ZnO-3.4603g, ZrO 2 -5.2388g, Nb 2 o 5 -11. 3009g of ingredients, 20g in total; the mixed powder was added to a polyester tank, after adding 160ml of deionized water and 150g of zirconium balls, ball milled on a planetary ball mill for 10 hours, and the speed of the ball mill was 1000 rpm;

[0037] 2. Put the ball-milled raw material in a drying oven, dry at 120°C and pass through a 40-mesh sieve to obtain a powder with uniform particles;

[0038] 3. Add 6% paraffin wax to the sieved powder as a binder for granulation, and pass through a 80-mesh sieve; then use a powder tablet press with a pressure of 7MPa to press it into a shape with a diameter of 10mm and a thickness of 5mm. body;

[0039] 4. Sinter the green body at 1175°C and keep it warm for 4 hours to obtain microwave dielectric zinc-zirconium-niobium ceramics;

[0040]Finally, the microwave characteristics of the obtained samp...

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Abstract

The invention discloses a low-loss zinc-zirconium-niobium series microwave dielectric ceramic prepared by a reaction sintering method and a preparation method thereof, which is composed of ZnZrNb2O8; ZnO, ZrO, and Nb2O5 raw materials are first prepared according to chemical formulas, and then ball milled, dried, and sieved 1. After granulation, it is pressed into a green body and sintered at 1125-1225°C to produce microwave dielectric ceramics. The dielectric constant is 27.82-28.99, the quality factor is 47600-764400GHz, and the temperature coefficient of resonance frequency reaches -56.76-48.71ppm / °C. The present invention saves the pre-calcination and secondary ball milling of the powder, greatly simplifies the preparation process and time of the material, saves the cost, and provides a method with simpler preparation process, wider application field and higher quality A reaction sintering method for zinc-zirconium-niobium series microwave dielectric ceramic materials.

Description

technical field [0001] The invention belongs to a ceramic composition characterized by components, in particular to a low-loss zinc-zirconium-niobium series microwave dielectric ceramic prepared by a reaction sintering method and a preparation method thereof. Background technique [0002] Microwave dielectric ceramic (MWDC) is a kind of information functional ceramic material working in the microwave frequency band, which has the characteristics of light weight, low cost, high dielectric constant, low loss, and small temperature coefficient of resonance frequency. It has been widely used in microwave electronic components such as filters, dielectric oscillators, dielectric resonant antennas, duplexers, and capacitors. With the development of modern communication technology, miniaturization, integration, high quality and low cost are the inevitable direction for the future development of microwave components. The development of microwave dielectric ceramic materials with hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/495
Inventor 张平赵永贵
Owner TIANJIN UNIV