Low temperature sintered microwave dielectric ceramics and its preparing method

A technology of microwave dielectric ceramics and low-temperature sintering, applied in ceramics, inorganic insulators, etc., can solve the problems of insufficient research, lack of research on microwave dielectric properties, and lack of in-depth research, and achieve simple process, low cost, and good reproducibility Effect

Inactive Publication Date: 2008-04-02
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are not many and in-depth studies on this material system with low sintering temperature, and there is still a lack of research on other phase materials of this system, especially their microwave dielectric properties.

Method used

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  • Low temperature sintered microwave dielectric ceramics and its preparing method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] According to x=0.01 in the expression of the main crystal phase of the material, the molar ratio of Li 2 CO 3 : Nb 2 o 5 :TiO 2 =5.05:0.15:9.6 Weighing, adding deionized water according to the weight ratio of mixture and deionized water is 1:1.8, wet ball milling for 24 hours, drying at 100-150°C, putting it into a high alumina crucible, at 850°C Pre-fired for 6 hours, the powder was crushed after pre-burning, and ethanol was added according to the weight ratio of the mixture and ethanol at 1:1.2, and after 24 hours of wet ball milling, the material was discharged and dried, and granulated with 4% to 8% PVA. Under the pressure of 100-200MPa, press it into a small disc with a diameter of 16mm and a thickness of 7-8mm, deglue at 650°C, then place the sample in an alumina crucible and sinter at 1100°C for 2h, and cool naturally to obtain the material of the present invention. The dielectric properties (at room temperature) were tested by the Hakki-Colemen cylindrical d...

Embodiment 2

[0024] According to x=0.04 in the main crystal phase expression of the material, the molar ratio Li 2 CO 3 : Nb 2 o 5 :TiO 2=17:1:14 Weighing, according to the weight ratio of mixture and deionized water is 1:1.8, add deionized water, wet ball mill for 24 hours, dry at 100-150°C, put into high alumina crucible, heat at 850°C Pre-fired for 6 hours, the powder was crushed after pre-burning, and ethanol was added according to the weight ratio of the mixture and ethanol at 1:1.2, and after 24 hours of wet ball milling, the material was discharged and dried, and granulated with 4% to 8% PVA. Under the pressure of 100-200MPa, press it into a small disc with a diameter of 16mm and a thickness of 7-8mm, deglue at 650°C, then place the sample in an alumina crucible and sinter at 1100°C for 2h, and cool naturally to obtain the material of the present invention. The dielectric properties (at room temperature) were tested by the Hakki-Colemen cylindrical dielectric resonance method, a...

Embodiment 3

[0026] According to x=0.081 in the expression of the main crystal phase of the material, the molar ratio of Li 2 CO 3 : Nb 2 o 5 :TiO 2 = 10.405: 1.215: 6.76 Weighing, according to the weight ratio of mixture and deionized water is 1: 1.8, add deionized water, wet ball mill for 24 hours, dry at 100-150°C, put it into a high-alumina crucible, at 850°C Pre-fired for 6 hours, the powder was crushed after pre-burning, and ethanol was added according to the weight ratio of the mixture and ethanol at 1:1.2, and after 24 hours of wet ball milling, the material was discharged and dried, and granulated with 4% to 8% PVA. Under the pressure of 100-200MPa, press it into a small disc with a diameter of 16mm and a thickness of 7-8mm, deglue at 650°C, then place the sample in an alumina crucible and sinter at 1100°C for 2h, and cool naturally to obtain the material of the present invention. The dielectric properties (at room temperature) were tested by the Hakki-Colemen cylindrical diel...

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Abstract

The present invention relates to low temperature sintered microwave dielectric ceramic and its preparation process, and belongs to the field of microwave dielectric ceramic technology. The material has the composition of Li2+xNb3xTi1-4xO3+yB2O3, where 0 C04B 35/462 C04B 35/622 H01B 3/12 1 8 2 2006/3/9 1821171 2006/8/23 100378031 2008/4/2 2008/4/2 2008/4/2 Shanghai Inst. of Ceramic Chemistry and Technology, CAS Shanghai 200050 Li Wei Zeng Qun Shi Jianlin Wu Wenjun Guo Jingkun

Description

technical field [0001] The invention relates to a low-temperature sintered novel microwave dielectric ceramic and a preparation method thereof, belonging to the field of microwave dielectric ceramics in the subject of materials. Background technique [0002] Microwave dielectric ceramics are a new type of functional electronic ceramics developed rapidly in the past 30 years. They have the characteristics of low loss, small frequency temperature coefficient, and high dielectric constant. Microwave dielectric ceramics can be made into dielectric resonators, filters, microwave dielectric antennas, etc., and are widely used in many fields such as mobile communications, satellite TV broadcast communications, and radar. In recent years, with the development of modern mobile communication equipment towards miniaturization, integration, high reliability, low cost, chip type, and environmental protection, microwave dielectric ceramics (Low Temperature Co- firedCeramic (LTCC for shor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/462C04B35/622H01B3/12
Inventor 李蔚曾群施剑林吴文骏郭景坤
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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