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A high adjustable rate and low loss strontium barium titanate composite zinc gallate ceramic material

A technology of compounding zinc gallate and barium strontium titanate is applied in the field of electronic materials and devices, and can solve the problems of insufficient tunable rate, low Q value under microwave, etc.

Active Publication Date: 2022-04-22
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these ceramic composites still have problems such as insufficient adjustable rate and low Q value under microwave, and the comprehensive performance needs to be further improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) According to 90 wt % Ba 0.4 Sr 0.6 TiO 3 +10 wt % ZnGa 2 o 4 The stoichiometric ratio in the weighed BaTiO 3 12.4g, SrTiO 3 14.6g, ZnO0.9g and Ga 2 o 3 2.1g of powder, put the prepared raw materials into a nylon ball mill tank, add zirconia balls and ball milling media, and then ball mill, and then pre-burn and grind the mixed powder to obtain mixed powder 1; The temperatures are 1100°C and 1385°C respectively, and the sintering time is 6 hours;

[0016] (2) Add the mixed powder 1 described in (1) into zirconia balls and absolute ethanol or deionized water for ball milling for 24 hours, and sieve the mixed powder 2 after discharging and drying;

[0017] (3) Add the mixed powder 2 described in (2) to a polyvinyl alcohol aqueous solution with a mass ratio of 10%, mix evenly and granulate, and then press under a pressure of 10MPa to form a ceramic green sheet;

[0018] (4) The ceramic green sheet described in (3) is degummed at a temperature of 550°C for 10 ho...

Embodiment 2

[0022] (1) According to 70 wt % Ba 0.4 Sr 0.6 TiO 3 +30 wt % ZnGa 2 o 4 The stoichiometric ratio in the weighed BaTiO 3 9.6g, SrTiO 3 11.4g, ZnO2.7g and Ga 2 o 3 6.3g of powder, put the prepared raw materials in a nylon ball mill tank, add zirconia balls and ball milling media, and then perform ball milling. The temperatures are 1100°C and 1385°C respectively, and the sintering time is 5 hours;

[0023] (2) Add the mixed powder 1 described in (1) into zirconia balls and absolute ethanol or deionized water for ball milling for 30 hours, and sieve the mixed powder 2 after discharging and drying;

[0024] (3) Add the mixed powder 2 described in (2) into an 8% polyvinyl alcohol aqueous solution by mass ratio, mix evenly and granulate, and then press under a pressure of 50MPa to form a ceramic green sheet;

[0025] (4) The ceramic green sheet described in (3) is degummed at a temperature of 580°C for 7 hours; after degumming, it is sintered at 1250°C for 6 hours to form po...

Embodiment 3

[0029] (1) According to 50 wt % Ba 0.4 Sr 0.6 TiO 3 +50 wt % ZnGa 2 o 4 The stoichiometric ratio in the weighed BaTiO 3 6.9g, SrTiO 3 8.1g, ZnO4.5g and Ga 2 o 3 10.5g powder, put the prepared raw materials into a nylon ball mill tank, add zirconia balls and ball milling media, and then perform ball milling. The temperatures are 1100°C and 1385°C respectively, and the sintering time is 4 hours;

[0030] (2) Add the mixed powder 1 described in (1) into zirconia balls and absolute ethanol or deionized water for ball milling for 48 hours, and sieve the mixed powder 2 after discharging and drying;

[0031] (3) Add the mixed powder 2 described in (2) to a polyvinyl alcohol aqueous solution with a mass ratio of 7%, mix evenly and granulate, and then press under a pressure of 100MPa to form a ceramic green sheet;

[0032] (4) The ceramic green sheet described in (3) is degummed at a temperature of 600°C for 4 hours; after degumming, it is sintered at 1300°C for 4 hours to for...

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Abstract

A strontium barium titanate-based composite zinc gallate ceramic dielectric material with high adjustable rate and low loss is characterized in that the component general formula of the strontium barium titanate-based composite zinc gallate ceramic dielectric material with high adjustable rate and low loss is is: (1‑x)Ba 0.4 Sr 0.6 TiO 3 ‑xZnGa 2 o 4 , where the value range of x is 10 wt%≤x≤70 wt%, choose BaTiO 3 Powder, SrTiO 3 powder, ZnO powder and Ga 2 o 3 Powder as the main raw material according to (1‑x)Ba 0.4 Sr 0.6 TiO 3 ‑xZnGa 2 o 4 The ingredients are ball milled, dried, and pre-fired at high temperature to obtain a mixed powder. After tableting, the glue is removed at a temperature of 550°C~600°C and then fired at a temperature of 1250°C~1300°C. The strontium barium titanate-based composite zinc gallate ceramic dielectric material with high adjustable rate and low loss prepared by the invention can be continuously adjusted in a wide range and has high comprehensive performance.

Description

technical field [0001] The invention belongs to the technical field of electronic materials and devices, and in particular relates to a dielectric material of strontium barium titanate-based composite zinc gallate ceramics with high adjustable rate and low loss and its preparation. Background technique [0002] Barium strontium titanate, a ferroelectric material, has the characteristics of adjustable dielectric nonlinearity, low dielectric loss, and adjustable Curie temperature, which makes it widely used in microwave devices such as tunable oscillators, filters, and phase shifters. focus on. Compared with other materials used in the communication field, such as ferrite and semiconductors, the use of ferroelectric materials has obvious advantages. Its use can reduce costs, reduce device volume and simplify circuit design, and has fast response and low power consumption. , high efficiency and wide working temperature range. The dielectric nonlinearity of barium strontium ti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/468C04B35/01
CPCC04B35/468C04B35/01C04B2235/96C04B2235/3213C04B2235/3284C04B2235/3286
Inventor 张明伟王威沈世婷辛乐
Owner SHANDONG UNIV OF TECH
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