Low temperature co-fired ceramic material and preparation method thereof

A technology of low temperature co-fired ceramics and tetragonal crystal system, applied in the field of microwave dielectric ceramics, can solve the problems of application limitations of microwave dielectric ceramic materials, difficult low temperature co-fired ceramic technology, inability to co-fire with metals, etc., and achieves low sintering temperature, small Effects of dielectric loss, mild reaction temperature

Active Publication Date: 2017-09-29
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The low temperature co-fired ceramic technology (Low Temperature Co-fired Ceramic, LTCC) is to make low temperature sintered ceramic powder into a green ceramic belt with precise thickness and density, and use laser drilling, microporous grouting, and precision conductors on the green ceramic belt. Paste printing and other processes produce the required circuit patterns, embed multiple passive components in it, and then s

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0021] Example 1

[0022] A method for preparing nano lanthanum bismuth sodium molybdate powder includes the following steps:

[0023] 1) Put 48.5g (0.1mol) Bi(NO 3 ) 3 ·5H 2 O,234g(0.4mol)La(NO 3 ) 3 ·6H 2 O was dissolved in 2L of 95% ethanol solution under stirring to obtain solution I;

[0024] 2) Add 242g (1mol) Na 2 MoO 4 ·2H 2 O was dissolved in 2L ethanol / water (volume ratio 1:1) mixed solvent with stirring, after dissolution, 242g polyethylene glycol (PEG molecular weight 2000) was added and stirred evenly to obtain solution II;

[0025] 3) Mix the solution I obtained in step 1) with the solution II obtained in step 2) under vigorous stirring. After the precursor is stirred uniformly, it is transferred to a sealed 5L autoclave, heated to 180°C and reacted for 12 hours. After cooling to room temperature, the obtained product was centrifuged and filtered, washed with deionized water, and the obtained powder was dried at 150°C for 2 hours to obtain NaBi 0.2 La 0.8 (MoO 4 ) 2 Of n...

Example Embodiment

[0027] Example 2

[0028] A method for preparing nano lanthanum bismuth sodium molybdate powder includes the following steps:

[0029] 1) Put 194g (0.4mol) Bi(NO 3 ) 3 ·5H 2 O and 58.5g (0.1mol) La(NO 3 ) 3 ·6H 2 O was dissolved in 2L ethanol solution with stirring to obtain solution I;

[0030] 2) Add 242g (1mol) Na 2 MoO 4 ·2H 2 O was dissolved in 2L ethanol / water (volume ratio 1:1) mixed solvent with stirring. After dissolution, 48.4g polyethylene glycol (PEG molecular weight 600) was added and stirred evenly to obtain solution II;

[0031] 3) Mix the solution I obtained in step 1) and the solution II obtained in step 2) under vigorous stirring. After the obtained precursor is uniformly stirred, it is transferred to a sealed 5L autoclave, heated to 130°C and reacted for 6 hours. After cooling to room temperature, the obtained product was centrifuged and filtered, washed with deionized water, and the obtained powder was dried at 800°C for 12 hours to obtain NaBi 0.8 La 0.2 (MoO 4 ) ...

Example Embodiment

[0033] Example 3

[0034] A method for preparing nano lanthanum bismuth sodium molybdate powder includes the following steps:

[0035] 1) Put 48.5g (0.1mol) Bi(NO 3 ) 3 ·5H 2 O,58.5g(0.1mol)La(NO 3 ) 3 ·6H 2 O was dissolved in 500 mL of 95% ethanol solution under stirring to obtain solution I;

[0036] 2) Add 96.8g (0.4mol) Na 2 MoO 4 ·2H 2 O was dissolved in 500mL ethanol / water mixed solvent with stirring, after dissolution, 50g polyethylene glycol (PEG molecular weight 2000) was added and stirred evenly to obtain solution II;

[0037] 3) Mix the solution I obtained in step 1) and the solution II obtained in step 2) under vigorous stirring. After the obtained precursor is stirred uniformly, it is transferred to a sealed 5L autoclave, heated to 150°C for 6 hours, and the reactor is naturally After cooling to room temperature, the obtained product was centrifuged and filtered, washed with deionized water, and the obtained powder was dried at 100°C for 6 hours to obtain NaBi 0.5 La 0.5 ...

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PUM

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Abstract

The invention relates to a low temperature co-fired ceramic material and a preparation method thereof. The low temperature co-fired ceramic material is NaBixLa(1-x)(MoO4)2 having a tetragonal crystal system structure, wherein 0x is not less than 0.2 and not more than 0.8, and the average particle size is 30-60 nm. The low temperature co-fired molybdate composite ceramic material prepared in the invention has a high dielectric constant (epsilon r is more than 10), a very small dielectric loss (Qf is more than 5000 GHz), a very low resonant frequency temperature coefficient (TCF is about 0 ppm/DEG C) and a low firing temperature (lower than the melting points of common metals Ag, Cu and Al), does not react with Ag and the like, can be used as a base material for LTCC substrates and packaging materials, and also can be used in electronic components, such as resonators and filters, as a microwave dielectric ceramic.

Description

technical field [0001] The invention belongs to the technical field of microwave dielectric ceramics, and relates to a low-temperature co-fired ceramic material and a preparation method thereof. Background technique [0002] Microwave dielectric ceramics are dielectric ceramic materials that are mainly used in circuits in the microwave frequency band (mainly 300MHz to 300GHz, corresponding to electromagnetic wavelengths of 1m to 1mm), and play one or more functions in the circuit. They are modern communication electronic components. (resonators, oscillators, filters, dielectric waveguide circuits, dielectric antennas, etc.) are widely used key materials. With the development of electronic circuits in the direction of miniaturization, integration and high frequency, the field of information technology has put forward requirements for electronic components with small size, high integration and low cost. [0003] The low temperature co-fired ceramic technology (Low Temperature...

Claims

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Application Information

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IPC IPC(8): C04B35/495C04B35/626
CPCC04B35/495C04B35/62605C04B2235/3201C04B2235/3227C04B2235/3256C04B2235/3298C04B2235/5454
Inventor 林志东杨静付萍陈喆邓泉荣
Owner WUHAN INSTITUTE OF TECHNOLOGY
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