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Low temperature co-fired ceramic material and preparation method thereof

A technology of low-temperature co-fired ceramics and ceramics, which is applied in the field of electronic devices and can solve problems such as low output, high cost, and complicated ultrafine powder process

Active Publication Date: 2014-04-02
CHONGQING YUNTIANHUA HIGH END NEW MATERIALS DEV CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of chemical synthesis and ultra-fine powder is complicated, the output is low, the cost is high, and it is not easy to mass produce. Therefore, adding low melting point oxides or glass phases is a common method to reduce the sintering temperature of ceramic materials, but it will lead to deterioration of ceramic properties

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  • Low temperature co-fired ceramic material and preparation method thereof

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preparation example Construction

[0048] The present invention also provides a preparation method of the above-mentioned low temperature co-fired ceramic material, comprising the following steps:

[0049] BaO, ZnO and TiO 2 mixing, pre-firing after ball milling to obtain ceramic briquettes, and pulverizing the ceramic briquettes to obtain ceramic powder;

[0050] Combine ZnO with B 2 o 3 mixing, pre-calcining after ball milling to obtain a sintered block, melting the sintered block to obtain glass droplets, quenching the glass droplets and pulverizing to obtain Zn-B sintering glass powder;

[0051] ZnO, B 2 o 3 with SiO 2 mixing, pre-calcining after ball milling to obtain a sintered block, melting the sintered block to obtain glass droplets, quenching the glass droplets and pulverizing to obtain Zn-B-Si sintered glass powder;

[0052] BaO, Bi 2 o 3 with SiO 2 mixing, pre-calcining after ball milling to obtain a sintered block, melting the sintered block to obtain glass droplets, quenching the glass dr...

Embodiment 1

[0071] 1mol of BaO powder, 0.25mol of ZnO powder and 2.75mol of TiO 2 powder, and then add deionized water accounting for 80% of the total mass of the above powder, mix evenly and carry out planetary ball milling, the ball milling time is 6h, to obtain the mixed powder; after drying the mixed powder, pre-fire at 1100°C for 6h, to obtain ceramics piece. The ceramics are quickly broken, and the planetary ball milling medium is isopropanol to obtain a ceramic powder of 0.5-3 μm;

[0072] Mix 50g of ZnO powder with 50g of B 2 o 3 Mix the powder, add isopropanol and zirconia balls, and wet ball mill for 12 hours; the glass raw material after ball milling is dried at 120°C after being discharged, and pre-fired at 650°C for 4 hours to become a ceramic material; the ceramic material is added at a temperature of In a crucible at 1500°C, it is rapidly melted into glass droplets and dropped on the cold roller. After cooling and quenching, the amorphous glass-ceramic material with a p...

Embodiment 2

[0076] 1mol of BaO powder, 0.25mol of ZnO powder and 2.75mol of TiO 2 powder, and then add deionized water accounting for 80% of the total mass of the above powder, mix evenly and carry out planetary ball milling, the ball milling time is 6h, to obtain the mixed powder; after drying the mixed powder, pre-fire at 1100°C for 6h, to obtain ceramics piece. The ceramics are quickly broken, and the planetary ball milling medium is isopropanol to obtain a ceramic powder of 0.5-3 μm;

[0077] 40g of Bi 2 o 3 powder, 35g of B 2 o 3 powder with 25g of SiO 2 Mix the powder, add isopropanol and zirconia balls, and wet ball mill for 12 hours; the glass raw material after ball milling is dried at 120°C after being discharged, and pre-fired at 650°C for 4 hours to become a ceramic material; the ceramic material is added at a temperature of In a crucible at 1500°C, it is rapidly melted into glass droplets and dropped on the cold roller. After cooling and quenching, the amorphous glass-...

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Abstract

The invention provides a low temperature co-fired ceramic material. The low temperature co-fired ceramic material comprises the following components: 79-95wt% of ceramics and 5-21wt% of firing aiding glass. Compared with existing ceramic materials, the low temperature co-fired ceramic material has the beneficial effects that BaO, ZnO and TiO2 components are used as the raw materials of the ceramics; the ceramics formed by BaO and TiO2 have excellent microwave dielectric properties but have higher sintering temperatures; the sintering temperatures of the ceramics can be obviously reduced through addition of ZnO, so that the ceramics with better dielectric properties and lower sintering temperatures are obtained; the firing aiding glass has lower sintering temperature and part of atoms in the firing aiding glass are the same as or similar to part of atoms in a ceramic matrix; and meanwhile, the low temperature co-fired ceramic material with middle dielectric constant is obtained by controlling the contents of the ceramics and the firing aiding glass.

Description

technical field [0001] The invention relates to the technical field of electronic devices, in particular to a low-temperature co-fired ceramic material and a preparation method thereof. Background technique [0002] After 30 years of development, modern mobile communications are gradually developing towards miniaturization, integration, high reliability and low cost. Therefore, higher requirements are put forward for microwave circuit components based on microwave dielectric ceramics. In order to meet the requirements of portability and miniaturization of mobile communication terminals, in addition to reducing the size of the resonant circuit, microwave dielectric materials with high dielectric constant, high Q value and near zero temperature have become a research hotspot. [0003] Low-temperature co-fired ceramics (LTCC) technology is to make low-temperature sintered ceramic powder into a green tape with precise thickness and density, and use laser drilling, microporous gr...

Claims

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Application Information

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IPC IPC(8): C04B35/63C04B35/49C04B35/622
Inventor 李在映杨晓战雒文博刘明龙杜富贵江林
Owner CHONGQING YUNTIANHUA HIGH END NEW MATERIALS DEV CO LTD
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