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Dielectric powder for 5G filter and preparation method of dielectric powder

A filter and dielectric powder technology, which is applied in the field of dielectric ceramic raw material preparation, can solve problems such as inability to meet 5G filters, and achieve microscopic uniformity, uniform shrinkage, and good consistency.

Pending Publication Date: 2020-10-09
四会市康荣新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the Q×f of the filter 0 It is still low and cannot meet the increasingly stringent requirements of the 5G filter industry. At the same time, the temperature coefficient of the existing test frequency has reached 145°C, and the requirements are becoming increasingly stringent; in essence, the microscopic crystal phase structure of the ceramics is required to be highly stable.

Method used

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  • Dielectric powder for 5G filter and preparation method of dielectric powder
  • Dielectric powder for 5G filter and preparation method of dielectric powder

Examples

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Embodiment 1

[0023] The chemical structural formula of a dielectric powder for 5G filters with high quality factor and near zero temperature drift is: 0.74Mg 4 Ta 2 o 9 -0.26Ca 0.8 SM 0.4 / 3 TiO 3 , its preparation method comprises the following steps:

[0024] (1) Synthesis of Mg 4 Ta 2 o 9 : First take by weighing respectively analytically pure magnesium carbonate (median particle diameter D50 is 0.6 μm) and analytical pure tantalum pentoxide (median particle diameter D50 is 1.2 μm) that the molar ratio is 4:1 to the mixing tank, then Add deionized water to form a mixed solution with a solid phase substance weight percentage of 15%, then add ammonium polyacrylate with 0.2% weight of deionized water into the mixing tank, stir and mix evenly to obtain slurry I, and then transfer slurry I Grind for 9 hours in a sand mill using zirconia balls as the grinding medium, until the D50 particle size is detected by a laser particle size analyzer to be less than 0.20 μm, use the spray drying ...

Embodiment 2

[0028] A high-quality factor, near-zero temperature drift dielectric powder for 5G filters. The chemical structural formula of Ⅱ is: 0.58Zn 4 Sb 2 o 9 -0.42Ba 0.571 Ce 0.286 TiO 3 , its preparation method comprises the following steps:

[0029] (1) Synthesis of Zn 4 Sb 2 o 9 : First weigh analytically pure zinc hydroxide (median particle size D50 is 1.2 μm) and analytically pure antimony trioxide (median particle size D50 is 1.0 μm) with a molar ratio of 4:1 respectively in the mixing tank, Then add deionized water to form a mixed solution with a solid phase substance weight percentage of 20%, then add CE-64 with 0.5% weight of deionized water into the mixing tank, stir and mix evenly to obtain slurry I, and then mix slurry I Transfer to a sand mill with zirconia balls as the grinding medium and grind for 11 hours until the D50 particle size is detected by a laser particle size analyzer to be less than 0.20 μm. The raw materials are granulated and dried by a spray dryi...

Embodiment 3

[0033] The chemical structural formula of a dielectric powder Ⅲ for 5G filters with high quality factor and near zero temperature drift is: 0.61Zn 4 Nb 2 o 9 -0.39Ca 0.5 co 0.5 TiO 3 , its preparation method comprises the following steps:

[0034] (1) Synthesis of Zn 4 Nb 2 o 9 : first weigh the analytically pure zinc oxide (median particle size D50 is 0.8 μm) and the analytically pure niobium pentoxide (median particle size D50 is 1.1 μm) with a molar ratio of 4:1 respectively in the mixing tank, then Add deionized water to form a mixed solution with a weight percentage of 18% of solid phase substances, then add 0.5% by weight of deionized water and NOF AKM-0531 grinding aid into the mixing tank, stir and mix evenly to obtain slurry I, Then transfer the slurry I to a sand mill with zirconia balls as the grinding medium and grind for 10 hours until the D50 particle size is detected by a laser particle size analyzer to be less than 0.20 μm. The raw materials are granula...

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Abstract

The invention discloses dielectric powder for a 5G filter and a preparation method of the dielectric powder. The chemical structural formula of the dielectric powder for the 5G filter is (1-z)A4M2O9-zBxDyTiO3, wherein the phase A is composed of two crystal phases of A4M2O9 and BxDyTiO3, z is the molar fraction of the BxDyTiO3 phase, A is one of Mg and Zn, M is one of Sb, Ta, Nb and V, z is largerthan 0.1 and smaller than 0.48, and x is larger than 0 and smaller than 0.48; B is one of Ca, Sr and Ba, D is at least one of Sr, Sm, La, Ce, Nd, Sn and Co, and the total valence algebraic sum of BxDyTiO3 is zero due to the valence combination of the x, y and B and D elements, wherein 0.5 < x < 0.9, y < 1. The invention discloses dielectric powder for a 5G filter and a preparation method of the dielectric powder, belongs to the technical field of preparation of dielectric ceramic raw materials, and proves that the dielectric ceramic powder has the characteristics of adjustable dielectric constant, high quality factor and near-zero temperature drift, and is stable in performance, wide in application prospect and relatively large in popularization potential when being applied to a 5G communication filter.

Description

technical field [0001] The invention relates to a dielectric powder, in particular to a dielectric powder for a 5G filter with high quality factor and near-zero temperature drift, and belongs to the technical field of dielectric ceramic raw material preparation. Background technique [0002] According to the latest mobile economy report released by the Global System for Mobile Communications Association (GSMA), global communication operators will have at least 1.027 billion US dollars will be invested, 80% of which will be used for 5G network construction. Dielectric ceramic filters have become the first choice of communication companies such as Huawei, ZTE, and Samsung. [0003] The electromagnetic wave resonance in the dielectric ceramic filter occurs inside the ceramic dielectric material, so the performance requirements for the microwave dielectric ceramic material are higher. The performance of the ceramic powder determines the performance of the dielectric filter, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/453C04B35/622
CPCC04B35/495C04B35/453C04B35/622C04B2235/3206C04B2235/3294C04B2235/3208C04B2235/3224C04B2235/3251C04B2235/3275C04B2235/3232C04B2235/6562C04B2235/6567C04B2235/3229C04B2235/3215
Inventor 莫卓荣
Owner 四会市康荣新材料有限公司
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