Niobium zinc barium-based microwave medium ceramic and preparation method thereof

A microwave dielectric ceramic, barium-based technology, applied in ceramics, inorganic insulators, etc., achieves the effects of good reproducibility, small temperature coefficient of resonant frequency, and improved preparation efficiency

Inactive Publication Date: 2010-09-15
江苏兴云新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the research of directly mixing low-melting point oxides with unpre-synthesized raw material powders, and directly performing low-temperature reaction sintering with raw material mixtures to obtain niobium-zinc-barium-based microwave dielectric ceramics.

Method used

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  • Niobium zinc barium-based microwave medium ceramic and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Model test and analysis of the structure and performance of the prepared BZN ceramic material: use the Archimedes drainage method to measure the density of the ceramic material; use the Hakki-Colemen cylindrical dielectric resonance method to test the microwave dielectric properties (at room temperature), where the resonance The temperature coefficient of frequency is obtained in the range of 25-85°C.

[0032] The raw material is analytically pure BaCO 3 , ZnO and Nb 2 o 5 , according to the stoichiometric ratio of the target product Ba(Zn 1 / 3 Nb 2 / 3 )O 3 Weighing: Weigh BaCO 3 63.03g, ZnO8.67g and Nb 2 o 5 28.3g, and in 100g above-mentioned raw material, add following additive: 0.5gCuO, 0.5gLi 2 CO 3 , 0.5g V 2 o 5 and 1.5g ZnO-B 2 o 3 , where ZnO-B 2 o 3 The mass of the two is: 10gZnO, 90g B 2 o 3 . Put the above raw materials into a planetary ball mill, add absolute ethanol according to 1.5 times the total weight of the mixture, grind and mix for 1...

Embodiment 2

[0035] The raw material is analytically pure BaCO 3, ZnO and Nb 2 o 5 , according to the stoichiometric ratio of the target product Ba(Zn 1 / 3 Nb 2 / 3 )O 3 Weighing: Weigh BaCO 3 63.03g, ZnO8.67g and Nb 2 o 5 28.3g, and in 100g above-mentioned raw material, add following additive: 1.0gCuO, 1.0gLi 2 CO 3 , 1.0g V 2 o 5 and 2.5g ZnO-B 2 o 3 , where ZnO-B 2 o 3 The mass of the two is: 20gZnO, 80g B 2 o 3 . Put the above raw materials into a planetary ball mill, add absolute ethanol according to 1.5 times the total weight of the mixture, grind and mix for 20 hours to obtain a slurry; dry the mixed slurry at 100°C for 18 hours, pass through a 100-mesh sieve to obtain a uniform distribution Add polyvinyl alcohol for granulation, the amount of polyvinyl alcohol is 2% of the weight of the mixed powder, press it into small discs under the pressure of 100Mpa, carry out pressureless sintering in air atmosphere at 980°C for 5h, and heat up The speed is 2°C / min, and after n...

Embodiment 3

[0038] The raw material is analytically pure BaCO 3 , ZnO and Nb 2 o 5 , according to the stoichiometric ratio of the target product Ba(Zn 1 / 3 Nb 2 / 3 )O 3 Weighing: Weigh BaCO 3 63.03g, ZnO8.67g and Nb 2 o 5 28.3g, and in 100g above-mentioned raw material, add following additive: 0.5gCuO, 1.0g Li 2 CO 3 , 1.5g V 2 o 5 and 3.5g ZnO-B 2 o 3 , where ZnO-B 2 o 3 The mass of the two is: 20gZnO, 80g B 2 o 3 . Put the above raw materials into a planetary ball mill, add absolute ethanol according to 1.5 times the total weight of the mixture, grind and mix for 28 hours to obtain a slurry; dry the mixed slurry at 110°C for 20 hours, pass through a 100-mesh sieve to obtain a uniform distribution Add polyvinyl alcohol for granulation, the amount of polyvinyl alcohol is 3% of the weight of the mixed powder, press it into small discs under the pressure of 110Mpa, carry out pressureless sintering in air atmosphere at 1010°C for 3h, and heat up The speed is 2°C / min, and afte...

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Abstract

The invention relates to the field of microwave medium ceramic of material science, in particular to Ba(Zn1/3Nb2/3)O3(BZN)-based microwave medium ceramic sintered by low-temperature reaction and a preparation method thereof. The method comprises the following steps of: adding the following additives in percentage by mass into a Ba(Zn1/3Nb2/3)O3(BZN) base material: 0.5 to 1.5 percent of CuO, 0.5 to 1.5 percent of Li2CO3, 0.5 to 1.5 percent of V2O5 and 1.5 to 4.5 percent of ZnO-B2O3; and performing common ball-milling and mixing, drying, screening and compression molding on the mixture, and then obtaining a dense ceramic product by reacting and sintering the mixture, wherein the sintering temperature can be reduced to 950 DEG C. The microwave medium ceramic has good microwave performance, and reduces the energy consumption and the cost.

Description

Technical field: [0001] The invention relates to a low-temperature reaction sintered niobium-zinc-barium-based microwave dielectric ceramic and a preparation method thereof, belonging to the technical field of special ceramic material preparation technology. Background technique: [0002] Microwave dielectric ceramics refer to ceramics that are used as dielectric materials in microwave frequency circuits and perform one or more functions. They are structural parts (microwave integrated circuit substrates, microwave component support frames, etc.) and widely used in modern communication fields. Key materials for microwave components such as functional devices (dielectric resonators, filters, microwave capacitors, dielectric antennas, dielectric waveguide hybrids, etc.). [0003] In recent years, with the rapid development of communication technology, mobile communication equipment and portable terminals are developing in the direction of small size, light weight, high frequen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622C04B35/64C04B35/495C04B35/453H01B3/12
Inventor 周宏明郑诗礼李荐郭雁军刘芙蓉
Owner 江苏兴云新能源有限公司
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