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Microwave dielectric ceramic material and preparation method thereof

A technology of microwave dielectric ceramics and raw materials, applied in the field of dielectric ceramics, can solve the problems of single dielectric constant and low quality factor, and achieve the effect of improving quality factor, broad application prospects, and expanding the range of dielectric constant

Active Publication Date: 2020-05-29
SHENZHEN ZHENHUA FU ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a microwave dielectric ceramic material and its preparation method, aiming to solve the technical problems of the existing microwave dielectric ceramic material with relatively single dielectric constant and low quality factor

Method used

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preparation example Construction

[0039] On the other hand, an embodiment of the present invention also provides a method for preparing a microwave dielectric ceramic material, comprising the following steps:

[0040] S01: Provide the raw materials for the preparation of the microwave dielectric ceramic material described in the embodiment of the present invention;

[0041] S02: mixing the titanium dioxide, silicon dioxide, zinc oxide and lithium carbonate, performing the first ball milling treatment, and then performing the first sintering to obtain an initial sintered product;

[0042] S03: Mixing the initial sintered product with the boron oxide and / or boric acid, performing a second ball milling treatment, and then performing a second sintering to obtain the microwave dielectric ceramic material.

[0043] The preparation method of the microwave dielectric ceramic material provided by the embodiment of the present invention is prepared by using special preparation raw materials. Firstly, the ceramic main pa...

Embodiment 1

[0050] A microwave dielectric ceramic material is made of the following raw materials in parts by weight:

[0051] 12 parts of titanium dioxide;

[0052] 65 parts of zinc oxide;

[0053] 24 parts of silicon dioxide;

[0054] Lithium carbonate 0.1 part;

[0055] Boron oxide 3 parts.

[0056] The preparation method of the microwave dielectric ceramic material comprises:

[0057] Put the titanium dioxide, zinc oxide, silicon dioxide and lithium carbonate in the above parts by weight into a ball mill jar for ball milling, and pre-sinter at 900°C after drying. Then add the remaining boron oxide by weight, perform ball milling for the second time, dry and shape, and then sinter at 900°C to obtain a microwave dielectric ceramic material. The preparation method can finally obtain a microwave dielectric ceramic material with a dielectric constant of 8, a quality factor Qf of 20000 GHz, and a temperature coefficient of resonance frequency of 0 ppm / °C.

Embodiment 2

[0068] A microwave dielectric ceramic material is made of the following raw materials in parts by weight:

[0069] 56 parts of titanium dioxide;

[0070] 34 parts of zinc oxide;

[0071] Silicon dioxide 0.1 part;

[0072] Lithium carbonate 11 parts;

[0073] Boron oxide 1 part.

[0074] The preparation method of the microwave dielectric ceramic material comprises:

[0075] Put the titanium dioxide, zinc oxide, silicon dioxide and lithium carbonate in the above parts by weight into a ball mill jar for ball milling, and pre-sinter at 900°C after drying. Then add the remaining boron oxide by weight, perform ball milling for the second time, dry and shape, and then sinter at 900°C to obtain a microwave dielectric ceramic material. The preparation method can finally obtain a microwave dielectric ceramic material with a dielectric constant of 25, a quality factor Qf of 30000 GHz, and a resonant frequency temperature coefficient of 0 ppm / °C.

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Abstract

The invention belongs to the technical field of dielectric ceramics, and particularly relates to a microwave dielectric ceramic material and a preparation method thereof. The preparation raw materialsof the microwave dielectric ceramic material comprise the following components in parts by weight: 12-56 parts of titanium dioxide, 0.1-24 parts of silicon dioxide, 0.1-65 parts of zinc oxide, 0.1-11parts of lithium carbonate, and 0.25-8 parts of boron oxide / or boric acid. The dielectric constant range of the microwave dielectric ceramic material prepared from the preparation raw materials can be expanded, the quality factor of the microwave dielectric ceramic material is improved, the temperature coefficient of resonance frequency of the microwave dielectric ceramic material can be close tozero, and therefore the microwave dielectric ceramic material can meet the electrical requirements of base materials needed by various LTCC components, can be well matched and co-sintered with silverelectrodes, and has wide application prospects.

Description

technical field [0001] The invention belongs to the technical field of dielectric ceramics, and in particular relates to a microwave dielectric ceramic material and a preparation method thereof. Background technique [0002] Low temperature co-fired ceramic (Low Temperature Co-fired Ceramic, LTCC) technology is a remarkable integrated component technology developed in 1982. It has become the development direction of the passive device field and the economic growth point of the new component industry. In the future Communications, wireless local area network (WLAN), digital signal processor, global positioning system (GPS) receiving components, automotive electronics and other fields have a huge market of tens of billions of dollars every year. Apply LTCC technology to produce filters, baluns, couplers, power dividers, antennas and other products. Low-temperature co-fired microwave dielectric ceramics are the key basic materials for the preparation of LTCC devices. In addit...

Claims

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Application Information

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IPC IPC(8): C04B35/453C04B35/46C04B35/622C04B35/626C04B35/64
CPCC04B35/453C04B35/46C04B35/622C04B35/62675C04B35/64C04B2235/3232C04B2235/3418C04B2235/3203C04B2235/3409C04B2235/3284C04B2235/656C04B2235/96
Inventor 刘洋朱建华肖倩黎燕林张婷王东王智会
Owner SHENZHEN ZHENHUA FU ELECTRONICS