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Dielectric-adjustable low-temperature co-firing ceramic material and preparation method thereof

A ceramic powder and dielectric technology, which is applied in the field of preparation of composite microwave ceramic materials and low-temperature co-fired ceramic devices, can solve the problem of low dielectric constant, achieve low cost, environmental protection, non-toxic side effects, and simple preparation process Effect

Inactive Publication Date: 2012-08-15
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, most of the ceramic powders for LTCC developed at home and abroad are non-dielectrically adjustable and have a low dielectric constant (less than 50). methods are rarely reported

Method used

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  • Dielectric-adjustable low-temperature co-firing ceramic material and preparation method thereof
  • Dielectric-adjustable low-temperature co-firing ceramic material and preparation method thereof
  • Dielectric-adjustable low-temperature co-firing ceramic material and preparation method thereof

Examples

Experimental program
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Embodiment

[0033] Ba 1-x Sr x TiO 3 -AMoO 4 Preparation of (A=Ba, Sr or Ca) Low Temperature Co-fired Ceramics

[0034] Table 1

[0035]

[0036]

[0037] Take by weighing Ba respectively according to the component distribution ratio in each embodiment in table 1 1-x Sr x TiO 3 (x=0.4~0.6) Powder, AMoO 4 (A=Ba, Sr, Ca) powder and yB 2 o 3 ·zLi 2 O powder, add zirconia balls and absolute ethanol or water, ball mill for 20 to 24 hours, discharge, dry and grind into powder, pass through a 200-mesh sieve to obtain the required low-temperature co-fired ceramic material.

[0038] According to the traditional electronic ceramics preparation process, 8% polyvinyl alcohol (PVA) is used as a binder for granulation, and the granulated low-temperature co-fired ceramic material is dry-pressed into diameters under a pressure of 10 MPa. Green sheet, after debonding treatment at 550°C, the sample is sintered in the air atmosphere, the sintering temperature is in the range of 900-950°C, ...

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Abstract

The invention relates to the technical fields of electronic materials and devices, and particularly relates to a composite microwave ceramic material with dielectric adjustable characteristic and low-temperature co-firing characteristic and a preparation method of a low-temperature co-firing ceramic device. The composite microwave ceramic material with dielectric adjustable characteristic and low-temperature co-firing characteristic comprises the following components in percentage by weight: 50-88wt% of Ba[1-x]SrxTiO3 (x=0.4-0.6), 10-48wt% of AMoO4(A=Ba, Sr or Ca) and 2-10wt% of yB2O3.zLi2O (y / z=0.5-1). The composite material disclosed by the invention is characterized in that the Ba[1-x]SrxTiO3 is simultaneously subjected to compound doping modification by a AMoO4 modifying agent and a yB2O3.zLi2CO3 glass sintering additive so as to obtain the composite microwave ceramic material with low sintering temperature (900-950DEG C). The composite microwave ceramic material is suitable for being applied to a low-temperature co-fired ceramic (LTCC) technology and a microwave adjustable device.

Description

technical field [0001] The invention relates to the technical field of electronic materials and devices, in particular to a composite microwave ceramic material with adjustable dielectric properties and low-temperature co-firing properties and a preparation method for low-temperature co-fired ceramic devices. Background technique [0002] High-performance electronic materials for Low Temperature Co-fired Ceramic (LTCC) technology is an important aspect of the development and production of LTCC devices. The use of electrical nonlinearity of ferroelectric ceramic materials is an important factor in the realization of passive tunable microwave devices. The development of BST low-temperature co-fired ceramic materials used in microwave tunable devices has become a current research hotspot. [0003] In recent years, barium strontium titanate (BST) ceramic material has the power-saving performance of nonlinear adjustable dielectric constant under the action of DC electric field, a...

Claims

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Application Information

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IPC IPC(8): C04B35/468C04B35/47C04B35/63
Inventor 翟继卫唐林江沈波
Owner TONGJI UNIV
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