Method for preparing low-dielectric-constant microwave dielectric ceramic material

A technology of microwave dielectric ceramics and low dielectric constant, which is applied in the field of low-temperature co-fired ceramics in the field of endogenous porcelain powder preparation, which can solve problems such as difficult to meet price wars, and achieve superior secondary processing performance, cheap raw materials, and low dielectric constant Effect

Active Publication Date: 2014-07-23
YUNNAN INFINE NEO MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with the modularization of electronic components and the surplus of electronic terminal products in the future, the price and cost competition will inevitably become more in...

Method used

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  • Method for preparing low-dielectric-constant microwave dielectric ceramic material
  • Method for preparing low-dielectric-constant microwave dielectric ceramic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 37.1g Ca(OH) 2 ; 43.42g H 3 BO 3 ; 6.95g Li 2 CO 3 ; 11.21g La 2 o 3 Mix, add 200g deionized water and 400g zirconia balls, and use wet ball milling for 8 hours;

[0027] After the ball-milled glass raw material is discharged, it is dried at 100°C, then quenched in molten water at 1475°C, and then crushed and ground into glass powder with a particle size of 200μm;

[0028] Weigh 60g prepared glass powder, 10g Al 2 o 3 , 120g SiO2 2 Mix, add 200g deionized water and 400g zirconia balls, use wet ball milling for 10 hours; add 38ml 10wt% PVA polymer binder aqueous solution, ball mill for 4 hours, mix evenly, granulate and press into tablets; The ceramic sheet is heated in a kiln-type sintering furnace at a heating rate of 2 °C / min to 450 °C for 2 hours, and then heated to 650 °C for 2 hours; The cooling rate of °C / min is lowered to 400 °C, and then cooled to room temperature with the furnace to obtain a low dielectric constant microwave dielectric ceramic m...

Embodiment 2

[0030] Weigh 37.5g Ca(OH) 2 ; 44.5 g H 3 BO 3 ;5.5g Li 2 CO 3 ; 11.5g La 2 o 3 Mix, add 200 g of deionized water and 400 g of zirconia balls, and use wet ball milling for 9 hours;

[0031] After the ball-milled glass raw material is discharged, it is dried at 110°C, then quenched in molten water at 1480°C, and then crushed and ground into glass powder with a particle size of 250 μm;

[0032] Weigh 64g prepared glass powder, 14g Al 2 o 3 , 120g SiO 2 Mix, add 360g deionized water and 720g zirconia balls, use wet ball milling for 10 hours; add 36ml 12wt% PVA polymer binder aqueous solution, ball mill for 5 hours, mix evenly, granulate and press into tablets; The ceramic sheet is heated in a kiln-type sintering furnace at a heating rate of 2 °C / min to 450 °C for 2 hours, and then heated to 650 °C for 2 hours; The cooling rate of °C / min is lowered to 400 °C, and then cooled to room temperature with the furnace to obtain a low dielectric constant microwave dielectric cera...

Embodiment 3

[0034] Weigh 38g Ca(OH) 2 ; 45.2 g H 3 BO 3 ; 4.6g Li 2 CO 3 ; 12g La 2 o 3 Mix, add 210g deionized water and 420g zirconia balls, and use wet ball milling for 9 hours;

[0035] After the ball-milled glass raw material is discharged, it is dried at 110°C, then quenched in molten water at 1490°C, and then crushed and ground into glass powder with a particle size of 250 μm;

[0036] Weigh 70g prepared glass powder, 18g Al 2 o 3 , 100g SiO 2Mix, add 200g deionized water and 400g zirconia balls, use wet ball milling for 11 hours; add 37.6ml 14wt% PVA polymer binder aqueous solution, ball mill for 6 hours, mix evenly, granulate and press into tablets; The ceramic pieces were heated in a kiln-type sintering furnace at a heating rate of 2 °C / min to 450 °C for 2 hours, and then heated to 650 °C for 2 hours; at a heating rate of 3 °C / min to 900 °C for 30 min, and then Cool down to 400°C at a cooling rate of 3°C / min, and cool down to room temperature with the furnace to obtain...

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Abstract

The invention discloses a method for preparing a low-dielectric-constant microwave dielectric ceramic material by a solid phase synthesis method, and belongs to the raw ceramic powder preparation technology in the field of low temperature co-fired ceramic (LTCC). With adopting of a conventional process and conventional equipment of the low temperature co-fired ceramic field, the ceramic powder material is prepared through the procedures of proportioning, ball milling, melting, crushing, compounding, secondary ball milling, granulating and the like. The ceramic material has the many advantages of low dielectric constant, low dielectric loss, good temperature stability, good processability, cheap raw materials, simple preparation process, low production cost, no special requirements on the equipment workshop environment and the like. The low-dielectric-constant microwave dielectric ceramic material provided by the invention can be used as a core material of electronic circuit substrates, resonators, filters, microwave substrates and microstrip lines, and also has important application prospects and economic benefits in electronic circuits, microwave communication, satellite communication and radar systems.

Description

technical field [0001] The invention uses a solid-phase synthesis method to prepare a microwave dielectric ceramic material with a low dielectric constant, and belongs to the technology for preparing raw porcelain powder in the field of low-temperature co-fired ceramics (LTCC). Background technique [0002] In recent years, low dielectric constant microwave dielectric ceramic materials have been widely used in civil and military applications because they can be used to make dielectric antennas, dielectric substrates and other related devices in microwave communication systems and microwave circuits. These applications have the following requirements for low dielectric constant microwave dielectric ceramic materials: (1) Stable dielectric constant ε r ; (2) Low dielectric loss (that is, high quality factor Q*f(GHz) value); (3) Resonant frequency temperature coefficient tending to zero τ f , to ensure that the device has good stability when the temperature fluctuates. These...

Claims

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Application Information

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IPC IPC(8): C04B35/14C04B35/622
Inventor 邢孟江
Owner YUNNAN INFINE NEO MATERIAL
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