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Microwave dielectric ceramic material and its preparation method and application

A technology of microwave dielectric ceramics and raw materials, which is applied to waveguide-type devices, circuits, resonators, etc., can solve the problems of high product cost, high sintering temperature, and low yield, and achieve lower dielectric loss, lower sintering temperature, and high quality. The effect of the factor

Active Publication Date: 2021-10-26
AUDIOWELL ELECTRONICS GUANGDONG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Chinese patent CN10326999 discloses a ZrO 2 -SnO 2 -TiO 2 The dielectric ceramic material that is the main component has a high quality factor (Q*f0) value of the system, and indicates that the absolute value of the temperature coefficient of frequency (τf) in a wide temperature range from a low temperature range to a high temperature range is small, but, The sintering temperature of the material in this system is 1430-1530°C, and the sintering temperature is too high, which makes it difficult to control the deformation during the process
However, the sintering temperature of this system material is 1420 ° C ~ 1600 ° C, the temperature is too high, the sintering process is easy to deform, and the use of a large amount of rare earth elements leads to high material costs
[0006] Chinese patent CN103073285B discloses a kind of MgTiO 3 -CaTiO 3 The dielectric ceramic material as the main body, the dielectric constant Er is 21~25, the frequency temperature coefficient is -15~25ppm / ℃, and there is a zero value, but the sintering temperature of this system material is 1150℃~1350℃, the temperature is too high , the sintering process will produce a certain deformation, resulting in low yield and high product cost

Method used

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  • Microwave dielectric ceramic material and its preparation method and application
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  • Microwave dielectric ceramic material and its preparation method and application

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preparation example Construction

[0069] A preparation method of a microwave dielectric ceramic material, comprising the steps of:

[0070] The MgO or Mg(OH) 2 with the SiO 2 , the CaCO 3 , the TiO 2 , the subcomponent A, the subcomponent C, water and zirconia balls are mixed to obtain a mixture A, and the mixture A is pretreated to obtain a mixture B;

[0071] Sintering the mixture B to obtain a mixture C;

[0072] Mixing the mixture C, zirconia balls, subcomponent B and water to obtain a mixture D, and pretreating the mixture D to obtain a mixture E;

[0073] An organic binder is added to the mixture E to obtain a mixture F, and the mixture F is subjected to granulation, tableting and sintering treatments.

[0074] Preferably, the preparation method of the microwave dielectric ceramic material includes the following steps:

[0075] The MgO or Mg(OH) 2 with the SiO 2 , the CaCO 3 , the TiO 2 , the subcomponent A, the subcomponent C, water and zirconia balls are mixed to obtain a mixture A, and the m...

Embodiment 1

[0086] This embodiment provides a microwave dielectric ceramic material and its preparation method and application.

[0087] (1) The composition of the microwave dielectric ceramic material is as follows:

[0088] Main crystal phase (by mol):

[0089] MgTiO 3 0.85,

[0090] Mg 2 SiO 4 0.1,

[0091] CaTiO 3 0.05;

[0092] Subcomponents (accounting for the percentage of the total mass of the microwave dielectric ceramic material)

[0093]

[0094]

[0095] (2) Preparation of microwave dielectric ceramic materials and ceramic resonators

[0096] Weigh MgO and SiO according to design requirements 2 、TiO 2 , CaCO 3 , Li 2 CO 3 、 Bi 2 o 3 , ZnO, Al 2 o 3 and MnO 2 , the MgO, SiO 2 、TiO 2 , Li 2 CO 3 、 Bi 2 o 3 , ZnO, Al 2 o 3 , water and zirconia balls are mixed to obtain a mixture A, and the mixture A is subjected to ball milling and pressure filtration drying to obtain a mixture B;

[0097] Put the mixture B into the kiln and react at 900°C to 1...

Embodiment 2

[0103] This embodiment provides a microwave dielectric ceramic material and a preparation method thereof.

[0104] (1) The composition of the microwave dielectric ceramic material is as follows:

[0105] Main crystal phase (by mol):

[0106] MgTiO 3 0.9,

[0107] Mg 2 SiO 4 0.05,

[0108] CaTiO 3 0.05;

[0109] Subcomponents (accounting for the percentage of the total mass of the microwave dielectric ceramic material)

[0110]

[0111] (2) Preparation of microwave dielectric ceramic materials and ceramic resonators

[0112] Weigh MgO and SiO according to design requirements 2 、TiO 2 , CaCO 3 , Li 2 CO 3 、 Bi 2 o 3 , ZnO, Al 2 o 3 and MnO 2 , the MgO, SiO 2 、TiO 2 , Li 2 CO 3 、 Bi 2 o 3 , ZnO, Al 2 o 3 , water and zirconia balls are mixed to obtain a mixture A, and the mixture A is subjected to ball milling and pressure filtration drying to obtain a mixture B;

[0113] Put the mixture B into the kiln and react at 900°C to 1000°C for 2 hours to o...

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Abstract

The invention relates to a microwave dielectric ceramic material and its preparation method and application. Its preparation raw materials include main components and auxiliary components: the main components include (X+2Y) moles of MgO or Mg(OH) 2 , Y moles of SiO 2 , Z moles of CaCO 3 , (X+Z) moles of TiO 2 ; X, Y and Z meet: X+Y+Z=1, 0.85≤X≤0.92, 0.04≤Y≤0.11, 0.04≤Z≤0.065; according to the percentage of the total mass of the microwave dielectric ceramic material, the subcomponents include : Subcomponent A 0.10% to 0.50%, Subcomponent B 0.05% to 0.30%, Subcomponent C 0.20% to 0.80%. The microwave dielectric ceramic material has a high dielectric constant, a high quality factor, a frequency temperature coefficient close to zero, and a low sintering temperature, which can prevent its size from being deformed during the sintering process, and is suitable for the 5G communication field.

Description

technical field [0001] The invention relates to the technical field of designing electronic information functional materials and devices, in particular to a microwave ceramic dielectric material and its preparation method and application. Background technique [0002] Microwave dielectric ceramic material is a new type of functional electronic ceramic material developed rapidly in the past 30 years. It has the characteristics of low dielectric loss, small frequency temperature coefficient, and high dielectric constant. Microwave dielectric ceramics can be used to make microwave components such as filters, resonators, and dielectric waveguide circuits, and dielectric substrates for microwave circuits. They have been widely used in many fields such as satellites, televisions, radars, mobile communications, and electronic computers. [0003] Microwave dielectric ceramics applied to 5G transmission require appropriate dielectric constant, high quality factor, and frequency tempe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/465C04B35/622C04B35/64H01P1/20H01P7/10
CPCC04B35/465C04B35/622C04B35/64C04B2235/3203C04B2235/3206C04B2235/3208C04B2235/3217C04B2235/3232C04B2235/3267C04B2235/3284C04B2235/3298C04B2235/3418C04B2235/3445C04B2235/656C04B2235/6567H01P1/20H01P7/10
Inventor 秦小勇
Owner AUDIOWELL ELECTRONICS GUANGDONG