Filter ceramics with precisely controllable dielectric constant for 5g base station and preparation method thereof

A dielectric constant and filter technology, which is applied in the field of filter ceramics and its preparation, can solve the problems of unstable filter performance and large error range

Active Publication Date: 2022-07-26
广州云海特新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For filter ceramics used in 5G base stations, the error range is too large, resulting in unstable filter performance

Method used

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  • Filter ceramics with precisely controllable dielectric constant for 5g base station and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Step 1: MgO, TiO 2 , BaO, La 2 O 3 , Al 2 O 3 Weigh respectively: 12.12g, 107.11g, 80.02g, 162.96g, 101.96g;

[0022] Step 2: Put the prepared materials into a horizontal ball mill, wherein the weight ratio of powder, zirconia balls and deionized water is 1:4:1.5, and the ball is milled at 400r / min for 5-8 hours;

[0023] Step 3: Pre-sinter the evenly mixed raw materials in a high-temperature sintering furnace in an air atmosphere at 5°C / min to 800°C for 3 hours to obtain the main crystal phase of 0.75Mg 0.3 Ba 0.7 TiO 3 -0.25LaAlO 3 ;

[0024] Step 4: The main crystalline phase obtained in the previous step is crushed with a jet mill, and 10.341g of sintering aids, 85.449g of ZnO and 990g of deionized water are added in proportion to continue ball milling for 6h, and then dried at 80°C for 5h in an air atmosphere;

[0025] Step 5: add 3wt% polyvinyl alcohol binder for granulation, and press it into small discs with a diameter of 18mm and a height of 4mm under ...

Embodiment 2

[0028] Step 1: MgO, TiO 2 , BaO, La 2 O 3 , Al 2 O 3 Weigh respectively: 12.11g, 107.12g, 80.04g, 162.95g, 101.94g;

[0029] Step 2: Put the prepared materials into a horizontal ball mill, wherein the weight ratio of powder, zirconia balls and deionized water is 1:4:1.5, and the ball is milled at 400r / min for 5-8 hours;

[0030] Step 3: Pre-sinter the evenly mixed raw materials in a high-temperature sintering furnace in an air atmosphere at 5°C / min to 800°C for 3 hours to obtain the main crystal phase of 0.75Mg 0.3 Ba 0.7 TiO 3 -0.25LaAlO 3 .

[0031] Step 4: The main crystalline phase obtained in the previous step is crushed with a jet mill, and 22.274g of sintering aids, 108.235g of ZnO and 1020g of deionized water are added in proportion to continue ball milling for 6h, and then dried at 80°C for 5h in an air atmosphere;

[0032] Step 5: add 3wt% polyvinyl alcohol binder for granulation, and press it into small discs with a diameter of 18mm and a height of 4mm unde...

Embodiment 3

[0035] Step 1: MgO, TiO 2 , BaO, La 2 O 3 , Al 2 O 3 Weigh respectively: 12.11g, 107.15g, 80.04g, 162.93g, 101.91g;

[0036] Step 2: Put the prepared materials into a horizontal ball mill, wherein the weight ratio of powder, zirconia balls, and deionized water is 1:4:1.5, and the ball is milled at 400r / min for 5-8 hours;

[0037] Step 3: Pre-sinter the evenly mixed raw materials in a high-temperature sintering furnace in an air atmosphere at 5°C / min to 800°C for 3 hours to obtain the main crystal phase of 0.75Mg 0.3 Ba 0.7 TiO 3 -0.25LaAlO 3 .

[0038] Step 4: The main crystalline phase obtained in the previous step is crushed with a jet mill, and 32.615g of sintering aids, 115.559g of ZnO and 1100g of deionized water are added in proportion to continue ball milling for 6h, and then dried at 80°C for 5h in an air atmosphere;

[0039] Step 5: add 3wt% polyvinyl alcohol binder for granulation, and press it into small discs with a diameter of 18mm and a height of 4mm und...

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Abstract

The invention relates to a filter ceramic with precisely controllable dielectric constant for 5G base station and a preparation method thereof. 0.3 Ba 0.7 TiO 3 ‑0.25LaAlO 3 +xCuO+yZnO, wherein 0<x≤1wt%, 1≤y≤3wt%. By adjusting the ratio of zinc oxide and copper oxide, the invention realizes that the sintering temperature of filter ceramics for 5G base station is reduced to 1300-1350°C, the quality factor Q×f=40000-50000GHz, and the dielectric constant of the ceramic is 40-45. Accurate and adjustable within the range, ε r The error range is less than ±0.2, which is suitable for the requirements of serialization and precision of dielectric constant of ceramic filters for 5G base stations.

Description

technical field [0001] The invention relates to a filter ceramic with an accurate and controllable dielectric constant for 5G base stations and a preparation method thereof, belonging to the field of microwave dielectric ceramics. Background technique [0002] With the advent of the 5G era, 5G base stations are developing towards miniaturization, light weight and high integration. Therefore, higher requirements are placed on ceramic filters for 5G base stations. The state strongly supports the commercialization of 5G networks, and the Development and Reform Office Gaoji [2020] No. 530 issued a document on accelerating the large-scale deployment and commercial application of 5G networks, and promoting the construction of 5G base stations and supporting networks in key areas. The domestic demand for 5G base station filters exceeds 1 billion, and the market size will reach 37 billion yuan in the next five years, so more high-quality and high-performance filter ceramics are nee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/50C04B35/622
CPCC04B35/50C04B35/622C04B2235/3206C04B2235/3215C04B2235/3217C04B2235/3232C04B2235/656C04B2235/6567C04B2235/602C04B2235/6562C04B2235/3281C04B2235/3284
Inventor 李春宏钟云康晓丽崔旭东
Owner 广州云海特新材料科技有限公司
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