TiO2-based microwave ceramic substrate material and preparation method and application thereof

A technology of microwave ceramics and substrates, which is applied in the direction of waveguide devices, electrical components, circuits, etc., can solve the dielectric temperature coefficient of untested TiO2 ceramic materials, cannot evaluate the processing requirements of fine grain structure on the surface of microstrip filters, and cannot determine the actual Application requirements and other issues, to achieve the effect of easy control and adjustment, easy material performance, and structural control improvement

Active Publication Date: 2020-03-24
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the article did not study its surface morphology, and could not evaluate whether it could meet the processing requirements of the fine particle structure on the surface of the microstrip filter, and did not test the modified TiO 2 The dielectric temperature coefficient of the ceramic material cannot be determined to meet the actual application requirements
[0005] Currently researched TiO 2 Microwave dielectric ceramic materials are trying their best to pursue their low loss characteristics, but never consider their machinability

Method used

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  • TiO2-based microwave ceramic substrate material and preparation method and application thereof
  • TiO2-based microwave ceramic substrate material and preparation method and application thereof
  • TiO2-based microwave ceramic substrate material and preparation method and application thereof

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Embodiment 1-16

[0039] (1) Ingredients: with a purity of 99.5% titanium dioxide, 99% basic magnesium carbonate, 99.5% zirconium dioxide, 99% tin dioxide, 99% niobium pentoxide, 99% manganese carbonate, 99.9% % cobalt monoxide, 99.5% copper oxide, 99.8% zinc oxide, and 99.9% aluminum oxide are the starting materials, and the mixture is obtained by batching according to the general chemical formula; the general chemical formula is Ti 1-x A x o 2 +yMgO+zB, where A=Zr, Sn, Nb, B=MnCO 3 , CoO, CuO, ZnO, Al 2 o 3 , based on molar percentage, 0.01≤x≤0.04, 0.01≤y≤0.05, 0.01≤z≤0.04;

[0040] (2) One-time ball milling and sieving: put the above mixture into a ball mill, use zirconia balls as the ball milling medium, and use deionized water as the solvent. According to the weight ratio of mixture: balls: water is 1: (3 ~ 5): (1-2) Grinding for 4-16 hours, discharging; then drying in an oven at 110°C for 12 hours, and sieving with a 60-mesh sieve after drying;

[0041] (3) Pre-sintering: the sieved...

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Abstract

The invention provides a TiO2-based microwave ceramic substrate material and a preparation method and application thereof. The TiO2-based microwave ceramic substrate material is composed of two crystal phases, namely a ceramic main crystal phase and a second crystal phase, wherein the ceramic main crystal phase is rutile type TiO2, and the second crystal phase is MgTi2O5. Common oxides including ZrO<2>, Nb<2>O<5> and SnO<2> are used as doping agents and enter TiO2 crystal lattices to form a solid solution; and MnCO<3>, CoO, CuO, ZnO and Al<2>O<3> are used as doping agents to play a role in improving the quality factor of the ceramic. The general chemical formula of the material is Ti<1-x>A<x>O<2> + yMgO + zB. The preparation method comprises the steps of burdening, ball milling, granulation, molding and sintering. The TiO2-based microwave ceramic substrate material prepared by the method disclosed by the invention has a relatively high Q*f value (20,000-40,000), a high dielectric constant (80-95) and a series of dielectric constant temperature coefficients (-550 to -900) through laboratory research and tests. The composite ceramic is suitable for manufacturing a substrate materialof a microwave capacitor, and can also be used for manufacturing materials of adjustable microwave devices such as a microstrip filter.

Description

technical field [0001] The invention relates to a microwave ceramic substrate material suitable for microwave capacitors and microstrip filters and a preparation method thereof. The ceramic material is based on rutile TiO 2 It is obtained through modification and belongs to the field of substrate materials for advanced communication components. Background technique [0002] With the rapid development of electronic information technology, the requirements for the integration, reliability, stability and miniaturization of electronic components are getting higher and higher. Today, the fourth generation (4G) communication network has been popularized around the world, and the 5G network has been vigorously promoted because of its advantages such as faster speed, wider network spectrum, and more intelligence. High frequency has become a new trend in the electronics industry. development trend. Ceramic filters are becoming more and more important between system modules and comm...

Claims

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Application Information

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IPC IPC(8): C04B35/46C04B35/622H01P1/203
CPCC04B35/46C04B35/622H01P1/203C04B2235/3244C04B2235/3251C04B2235/3293C04B2235/3284C04B2235/3281C04B2235/3275C04B2235/3262C04B2235/3217C04B2235/3206
Inventor 唐斌申懿婷熊喆袁颖钟朝位张树人
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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