Method for preparing high Q-value magnesium titanate base microwave medium ceramics by adopting reactive sintering method

A technology of microwave dielectric ceramics and magnesium titanate, which is applied in the field of reaction sintering and magnesium titanate-based microwave dielectric ceramics preparation, can solve problems such as harsh process conditions and complex processes, achieve simple preparation process, simplify preparation process, and improve resonance. Effect of Temperature Coefficient of Frequency

Inactive Publication Date: 2011-08-17
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the disadvantages of complex technology and harsh process conditions of the prior art, and use MgO, TiO 2 as the main raw material, and add appropriate amount of CoO, NiO, ZnO, MnO 2 , ZrO 2 or SnO 2 Additives, providing a reaction sintering method for magnesium titanate-based microwave dielectric ceramic materials with simple preparation process, wider application fields and extremely high quality factor

Method used

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  • Method for preparing high Q-value magnesium titanate base microwave medium ceramics by adopting reactive sintering method
  • Method for preparing high Q-value magnesium titanate base microwave medium ceramics by adopting reactive sintering method

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Effect test

Embodiment 1-1

[0018] According to microwave dielectric ceramic composition MgTiO 3 , weigh TiO 2 14.38g, MgO 6.82g batching, put the mixed powder into a polyester tank, add 150ml of deionized water and 150g of zirconium balls, and ball mill on a planetary ball mill for 12 hours at a speed of 1000 rpm. After the material is discharged, put it in a drying oven to dry at 120°C and pass through a 40-mesh sieve. Add 6% paraffin wax as a binder to the powder for granulation. After passing through a 80-mesh sieve, press the powder into tablets The machine is pressed into a green body with a diameter of 10mm and a height of 5mm with a pressure of 4MPa. The green body was sintered at 1350°C for 4 hours to obtain microwave dielectric ceramics. The microwave dielectric properties of the samples were measured.

Embodiment 1-2

[0020] According to microwave dielectric ceramic composition MgTiO 3 , weigh TiO 2 7.99g, MgO 4.03g ingredients, the mixed powder was put into a polyester tank, after adding 150ml of deionized water and 150g of zirconium balls, ball milled on a planetary ball mill for 12 hours at a speed of 1000 rpm. After the material is discharged, put it in a drying oven to dry at 120°C and pass through a 40-mesh sieve. Add 6% paraffin wax as a binder to the powder for granulation. After passing through a 80-mesh sieve, press the powder into tablets The machine is pressed into a green body with a diameter of 10mm and a height of 5mm with a pressure of 4MPa. The green body was sintered at 1350°C for 4 hours to obtain microwave dielectric ceramics. The microwave dielectric properties of the samples were measured.

Embodiment 1-3

[0022] According to microwave dielectric ceramic composition MgTiO 3 , weigh TiO 2 23.97g, MgO 12.09g ingredients, the mixed powder was put into a polyester tank, after adding 150ml of deionized water and 150g of zirconium balls, ball milled on a planetary ball mill for 12 hours at a speed of 1000 rpm. After the material is discharged, it is dried in a drying oven at 120°C and passed through a 40-mesh sieve, and 6% by mass of paraffin wax is added to the powder as a binder for granulation. After passing through a 80-mesh sieve, the powder is pressed into tablets The machine is pressed into a green body with a diameter of 10mm and a height of 5mm with a pressure of 4MPa. The green body was sintered at 1350°C for 4 hours to obtain microwave dielectric ceramics. The microwave dielectric properties of the samples were measured.

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Abstract

This invention relates to a method for preparing high Q-value magnesium titanate base microwave medium ceramics by adopting a reactive sintering method. The steps are as follows: (1) mixing according to the ingredients of the magnesium titanate base microwave medium ceramics and the mass percent of the ingredients: MgTiO3- mwt%MO, wherein MO is an additive CoO, NiO, ZnO, MnO2, ZrO2 or SnO2, and mis larger than or equal to 0 and smaller than or equal to 10; (2) drying and screening ball-milled materials; (3) granulating and screening, pressing to form a green body, and sintering at the temperature of 1250-1400 DEG C; and (4) conducting physical and dielectric property detection. This invention omits pre-burning and secondary ball-milling of powder materials, saves time and energy costs, and provides the reactive sintering method of magnesium titanate base microwave medium ceramic materials, wherein the reactive sintering method is simple in preparation technology, has an extremely high quality factor and improves the resonant frequency temperature coefficient of the magnesium titanate base microwave medium ceramic materials; and with the method, the application of the materials in microwave communication is wider.

Description

technical field [0001] The invention belongs to the field of electronic information materials and components, and relates to a simple method for preparing magnesium titanate-based microwave dielectric ceramics - a reaction sintering method. Background technique [0002] With the rapid development of communication technology, especially mobile communication technology, it is difficult for metal cavity resonators to meet the needs of high frequency, high quality factor and high temperature stability applications in communication systems. The market responds to higher frequency dielectric resonators, The demand for microwave components such as dielectric filters is increasing day by day. The emergence of microwave dielectric ceramics has greatly promoted the development of microwave integrated circuits. Microwave ceramic materials with suitable dielectric constants, high quality factors, and good frequency-temperature characteristics will become an important direction for elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/462C04B35/622C04B35/64
Inventor 李玲霞丁响王洪茹张志萍
Owner TIANJIN UNIV
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