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Columbate LTCC microwave medium ceramic and preparation method thereof

A technology of microwave dielectric ceramics and niobate, which is applied in the field of ceramic compositions, can solve the problem of low temperature, achieve the effects of simple preparation process, wide application prospects, saving time cost and energy cost

Inactive Publication Date: 2018-09-04
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

LiZnNbO 4 The system has a low junction temperature and does not contain easily reducible valence-changing elements, so it is more suitable for LTCC applications of Cu electrodes, but current research has found that it has obvious defects, that is, one of the main parameters of microwave performance - the quality factor Qf is relatively low , so it is necessary for the pure phase LiZnNbO 4 Modified to further improve its microwave dielectric properties to better meet the actual application requirements

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  • Columbate LTCC microwave medium ceramic and preparation method thereof

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Embodiment Construction

[0018] The present invention uses Li 2 CO 3 , ZnO, CoO, NiO, Nb 2 o 5 (analytical pure) as the initial raw material, microwave dielectric ceramics were prepared by a simple solid-phase synthesis method. The specific implementation plan is as follows:

[0019] 1. Put Li 2 CO 3 , ZnO, CoO, NiO, Nb 2 o 5 According to the stoichiometric formula LiZn 1-x m x Nb x o 4 , M=Co or Ni, x=0.02~0.06 for batching. Put about 15g of powder into a ball mill jar, add 250ml of absolute ethanol and 150g of zirconium balls, and mill on a planetary ball mill for 6 hours at a speed of 400 rpm;

[0020] 2. Put the ball-milled powder in an infrared oven, dry it at 100°C and pass it through a 40-mesh sieve for 2-3 times;

[0021] 3. Put the dried and sieved powder into a medium-temperature furnace, pre-fire at 950°C, and keep it warm for 4 hours;

[0022] 4. Add 15wt%-17wt% PVA aqueous solution (mass concentration 4wt%) to the pre-burned powder in step 3 and mix it as a binder, put it in...

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Abstract

The invention discloses a columbate LTCC microwave medium ceramic. A composition expression is LiZn1-xMxNbxO4, M is Co or Ni, x is 0.02-0.06, according to a preparation method, Li2CO3, ZnO, CoO, NiO,and Nb2O5 are burdened according to a stoichiometric equation, through steps of ball milling, drying, and sieving, the materials are subjected to calcining at the temperature of 950 DEG C, 15 wt%-17 wt% of a PVA aqueous solution is applied for granulation, the materials are compacted for moulding to obtain a base substrate, the base substrate is subjected to sintering at the temperature of 995-1040 DEG C, and the columbate LTCC microwave medium ceramic is prepared. The dielectric constant epsilon r of the columbate LTCC microwave medium ceramic is 14-16, a quality factor Qf value is 62000-103000 GHz, and a temperature coefficient of resonance frequency tau f is -59--63 ppm / DEG C. The preparation technology is simple, the sintering temperature is low, the time and energy cost can be saved,and the application prospect is wide.

Description

technical field [0001] The present invention belongs to a kind of ceramic composition characterized by composition, especially relates to a kind of LiZn 1-x m x Nb x o 4 (M=Co, Ni) is a microwave dielectric ceramic material with a chemical formula, good microwave dielectric properties and low sintering temperature, which can meet the application requirements of copper interconnection LTCC. Background technique [0002] With the rapid development of modern information technology, the miniaturization, light weight, integration and high frequency of electronic circuits have put forward requirements for small size, high frequency, high reliability and high integration of electronic components. Chipping and miniaturization have become one of the important symbols to measure the development level of electronic components. Low-temperature co-fired ceramic technology (LTCC) has become the mainstream way of electronic component integration due to its excellent electrical, mechani...

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Application Information

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IPC IPC(8): C04B35/495C04B35/622
CPCC04B35/495C04B35/622C04B2235/3203C04B2235/3275C04B2235/3279C04B2235/3284
Inventor 李玲霞张博文
Owner TIANJIN UNIV