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Method for preparing ceramic powder used for barium titanate-based low temperature co-fired plate

A technology of barium titanate powder and low-temperature co-firing is applied in the field of preparing ceramic powder for barium titanate-based low-temperature co-firing plate, which can solve the application limitation and reduce the sintering temperature of barium titanate and the sintering temperature of barium titanate powder. High problems, to achieve the effect of reducing sintering temperature, large surface activity, and fine grain

Active Publication Date: 2014-06-25
LIAONING SILICATE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem that the sintering temperature of the above-mentioned barium titanate powder is too high and the application of LTCC materials is limited, the present invention provides a method for preparing ceramic powder for barium titanate-based low-temperature co-fired plates. Synthesize barium titanate powder as a matrix, and reduce the sintering temperature of barium titanate by adding a sintering accelerator to form a barium titanate-based ceramic powder for low-temperature co-fired plates

Method used

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  • Method for preparing ceramic powder used for barium titanate-based low temperature co-fired plate

Examples

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Embodiment 1

[0016] A method for preparing ceramic powder for barium titanate-based low-temperature co-fired plates:

[0017] Take 63.1g of barium hydroxide octahydrate and dissolve it in 120ml of water at 80°C until saturated. Dissolve 34.1 g of tetrabutyl titanate in 120 ml of ethanol and heat to 80°C. The above two solutions were mixed so that the molar ratio of barium to titanium was 2.0 to form a soymilk-like white solution, which was poured into a high-pressure reactor and reacted at 240° C. for 48 hours to synthesize a barium titanate slurry. The barium titanate slurry was washed 8 times with water, and dried to obtain barium titanate powder. Take 50g barium titanate powder, add sintering accelerator B 2 o 3 -SiO 2 8.82g, of which B 2 o 3 6.17g, SiO 2 2.65g. Put it into a ball mill jar and mill it with water balls for 12 hours to meet the powder: water: ball = 1:2:3 (mass ratio), dry and grind, pass through a 200-mesh standard sieve to obtain barium titanate-based ceramics f...

Embodiment 2

[0019] A method for preparing barium titanate-based low-temperature co-fired plate ceramic powder:

[0020] Take 63.1g of barium hydroxide octahydrate and dissolve it in 120ml of water at 76°C until saturated. Take 37.8g of titanium isopropoxide and dissolve it in 150ml of isopropanol, and heat to 76°C. The above two solutions were mixed so that the molar ratio of barium to titanium was 1.8 to form a soymilk-like white solution, which was poured into a high-pressure reactor and reacted at 180° C. for 72 hours to synthesize a barium titanate slurry. The barium titanate slurry was washed with water for 4 times, and dried to obtain barium titanate powder. Take 50g barium titanate powder, add sintering accelerator B 2 o 3 -Bi 2 o 3 5.56g, of which B 2 o 3 3.34g, Bi 2 o 3 2.22g. Put it into a ball mill jar and mill it with water balls for 9 hours to meet the powder: water: ball = 1:1.5:2 (mass ratio), dry and grind, pass through a 200-mesh standard sieve to obtain barium ...

Embodiment 3

[0022] A method for preparing barium titanate-based low-temperature co-fired plate ceramic powder:

[0023] Take 63.1g of barium hydroxide octahydrate and dissolve it in 120ml of water at 80°C until saturated. Take 37g of tetrabutyl titanate and dissolve it in 120ml of isopropanol, and heat to 80°C. The above two solutions were mixed, and the barium-titanium molar ratio was 1.5 to form a soymilk-like white solution, which was poured into a high-pressure reactor and reacted for 50 hours at 200° C. to synthesize a barium titanate slurry. The barium titanate slurry was washed twice with water, and dried to obtain barium titanate powder. Take 50g barium titanate powder, add sintering accelerator B 2 o 3 -SiO 2 1g, of which B 2 o 3 0.5g, SiO 2 0.5g. Put it into a ball mill jar and mill it with water balls for 8 hours to meet the powder: water: ball = 1:1:1.5 (mass ratio), dry and grind, pass through a 200-mesh standard sieve to obtain barium titanate-based low-temperature c...

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Abstract

The invention relates to a method for preparing ceramic powder used for a barium titanate-based low temperature co-fired plate, mainly overcomes the problem that a sintering temperature of barium titanate powder is too high in the prior art and an application of the barium titanate powder in a low temperature co-fired ceramic material is limited, and belongs to the technical field of functional ceramics. According to the method, the barium titanate powder is prepared via a solvothermal method by using barium hydroxide octahydrate, barium chloride or barium nitrate as barium source and tetrabutyl titanate or isopropyl titanate as titanium source, and adding ethanol or isopropanol as an auxiliary agent; and the ceramic powder used for the barium titanate-based low temperature co-fired plate is prepared by using 85-98% by mass of BaTiO3 as a matrix and adding 2-15% by mass of a sintering promoter B2O3-SiO2 or Bi2O3 and through the steps of ball milling, drying and grinding. The method is characterized in that the barium titanate powder prepared by a low temperature solvothermal method has fine and uniform grain size and large surface activity; by adding a small amount of the sintering promoter, the late-stage sintering temperature of the ceramic is effectively reduced; and high-performance barium titanate-based low temperature co-fired plate can be prepared.

Description

technical field [0001] The invention relates to a method for preparing ceramic powder for barium titanate-based low-temperature co-fired plates, and belongs to the technical field of preparation of functional ceramic materials. Background technique [0002] The technology of low temperature co-fired ceramics (LTCC) is a remarkable integration and assembly technology developed in recent years. It has become the mainstream technology of passive integration, the development direction of the passive component field and the economic growth point of the new component industry. LTCC technology is to make low-temperature sintered ceramic powder into a green tape with precise thickness and density, and use laser drilling, microporous grouting, precision conductor paste printing and other processes on the green tape to produce the required circuit patterns, and then Multiple passive components (such as low-capacity, resistors, filters, impedance converters, couplers, etc.) are embedde...

Claims

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Application Information

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IPC IPC(8): C04B35/468C04B35/622
Inventor 张莹莹韩绍娟许壮志薛健张明李军
Owner LIAONING SILICATE RES INST
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