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Anion substituted low-temperature sintered lithium magnesium and titanium series microwave dielectric ceramic

A microwave dielectric ceramic, low temperature sintering technology

Inactive Publication Date: 2019-03-08
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] What the present invention will solve is to overcome Li 2 Mg 3 TiO 6 Due to the high sintering temperature of microwave dielectric ceramics, which cannot be used in LTCC technology, a kind of anion is proposed to replace low-temperature sintered lithium-magnesium-titanium microwave dielectric ceramics. 2 CO 3 , MgO, TiO 2 , LiF as the main raw material, using the traditional solid-phase method, through the F - ion pair O 2- The substitution of ions can effectively reduce the pre-sintering temperature and sintering temperature of lithium-magnesium-titanium ceramics, and prepare low-temperature sintered Li 2 Mg 3 TiO 6 It is a microwave dielectric ceramic, while maintaining its excellent microwave dielectric properties, which can meet its application in LTCC technology

Method used

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  • Anion substituted low-temperature sintered lithium magnesium and titanium series microwave dielectric ceramic

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. According to the microwave dielectric ceramic composition Li 2 Mg 3 Ti(O 0.97 f 0 . 06 ) 6 , called Li 2 CO 3 -6.7147g, MgO-13.3997g, TiO 2 -8.8508g, LiF-1.0349g ingredients, a total of 30g; the mixed powder was added to the polyester tank, after adding 180ml deionized water and 150g zirconium balls, ball milled on a planetary ball mill for 4 hours, and the speed of the ball mill was 250 rpm;

[0030] 2. Put the ball-milled raw materials in a drying oven, dry them in an oven and pass through a 40-mesh sieve to obtain a powder with uniform particles;

[0031] 3. Calcinate the powder at 700°C for 4 hours;

[0032] 4. Put the calcined powder, deionized water and zirconium balls into the polyester tank according to the mass ratio of 3:18:15, mill the ball for 6 hours for the second time, dry the material after discharge, and pass through a 40-mesh sieve; then add The paraffin wax that accounts for 8% by weight of the powder is used as a binder to granulate and p...

Embodiment 2

[0036] 1. According to the microwave dielectric ceramic composition Li 2 Mg 3 Ti(O 0.96 f 0.08 ) 6 , called Li 2 CO 3-6.2539g, MgO-13.4654g, TiO 2 -8.8942g, LiF-1.3866g ingredients, a total of 30g; the mixed powder was added to the polyester tank, after adding 180ml deionized water and 150g zirconium balls, ball milled on a planetary ball mill for 8 hours, and the speed of the ball mill was 250 rpm;

[0037] 2. Put the ball-milled raw materials in a drying oven, dry them in an oven and pass through a 40-mesh sieve to obtain a powder with uniform particles;

[0038] 3. Calcinate the powder at 700°C for 4 hours;

[0039] 4. Put the calcined powder, deionized water and zirconium balls into the polyester tank according to the mass ratio of 3:18:15, mill the ball for 8 hours for the second time, dry the material after discharge, and pass through a 40-mesh sieve; then add The paraffin wax that accounts for 7% by weight of the powder is used as a binder to granulate and pass ...

Embodiment 3

[0043] 1. According to the microwave dielectric ceramic composition Li 2 Mg 3 Ti(O 0.95 f 0.1 ) 6 , called Li 2 CO 3 -5.7885g, MgO-13.5317g, TiO 2 -8.9380g, LiF-1.7418g ingredients, a total of 30g; the mixed powder is added to the polyester tank, after adding 180ml deionized water and 150g zirconium balls, ball mill on a planetary ball mill for 6 hours, and the speed of the ball mill is 250 rpm;

[0044] 2. Put the ball-milled raw materials in a drying oven, dry them in an oven and pass through a 40-mesh sieve to obtain a powder with uniform particles;

[0045] 3. Calcinate the powder at 700°C for 4 hours;

[0046] 4. Put the calcined powder, deionized water and zirconium balls into the polyester tank according to the mass ratio of 3:18:15, mill the ball for 7 hours for the second time, dry the material after discharge, and pass through a 40-mesh sieve; then add The paraffin wax that accounts for 6% by weight of the powder is used as a binder to granulate and pass thro...

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Abstract

The invention belongs to the technical field of ceramic materials, and discloses an anion substituted low-temperature sintered lithium magnesium and titanium series microwave dielectric ceramic and apreparation method thereof. The chemical formula of the anion substituted low-temperature sintered lithium magnesium and titanium series microwave dielectric ceramic is Li2Mg3Ti (O1-x / 2Fx)6, and 0.06< / =x< / =0.12. The preparation method comprises the steps of blending Li2CO3, MgO, TiO2 and LiF in proportion; drying and sieving after primary ball-milling, and calcining at a certain temperature to obtain pre-calcined powder; after secondarily ball-milling the pre-calcined powder, drying and sieving the pre-calcined powder, granulating the pre-calcined powder, sieving, and then compressing to obtain a blank; and sintering the blank at a certain temperature, and after insulating, cooling the product to the room temperature to obtain the final product. A traditional solid-phase method is adopted,by substitution of F-ions to O2-ions, the pre-calcining temperature and sintering temperature of the lithium magnesium and titanium ceramic are reduced effectively, the low-temperature sintered Li2Mg3TiO6 series microwave dielectric ceramic is prepared, meanwhile, an excellent microwave dielectric property is maintained, and application of the ceramic in an LTCC technology can be met.

Description

technical field [0001] The invention belongs to the technical field of ceramic materials, in particular, relates to a ceramic composition characterized by components and a preparation method thereof, especially a novel low-temperature sintered lithium magnesium titanium (Li 2 Mg 3 TiO 6 ) is a microwave dielectric ceramic and a preparation method thereof. Background technique [0002] The rapid development of modern mobile communication has promoted the rapid development of various microwave mobile communication terminal equipment in the direction of miniaturization, light weight, multi-function and low cost. The multilayer structure design based on low-temperature co-fired ceramic (LTCC) technology can effectively reduce the volume of devices, and is an important way to realize the miniaturization, integration and modularization of components. LTCC technology adopts a multi-layer structure, which requires microwave dielectric materials to be co-fired with high-conductivi...

Claims

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Application Information

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IPC IPC(8): C04B35/465C04B35/622C04B35/64
CPCC04B35/465C04B35/622C04B35/64C04B2235/3203C04B2235/3206C04B2235/445
Inventor 张平杨苗苗
Owner TIANJIN UNIV
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