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Process for manufacturing barium zirconium titanate ceramic

A ceramic material, the technology of barium zirconate titanate, applied in the field of preparing barium zirconate titanate ceramic material, can solve the problems that the method of barium zirconate titanate ceramic material has not been introduced, it is not suitable for large-scale production and application, and the price of rare earth raw materials is expensive. Achieve the effect of good shape and dielectric properties, strong dielectric nonlinearity, and not easy to fatigue

Inactive Publication Date: 2008-12-10
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The Chinese patent application "Rare Earth Oxide Doped Modified Barium Zirconate Titanate Dielectric Adjustable Ceramic Material and Its Preparation Method" with the application number 200710036481.1 discloses a rare earth oxide doped modified barium zirconate titanate dielectric Adjustable ceramic material and its preparation method, but rare earth raw materials are expensive, in the case of little improvement in the performance of ceramic materials, the cost performance of the material and method is not high, not suitable for large-scale industrial production and application, and the patent It only introduces the preparation method of barium zirconate titanate when doped with rare earth oxides, but does not introduce the method of pure preparation of barium zirconate titanate ceramic materials

Method used

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  • Process for manufacturing barium zirconium titanate ceramic
  • Process for manufacturing barium zirconium titanate ceramic
  • Process for manufacturing barium zirconium titanate ceramic

Examples

Experimental program
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Embodiment 1

[0040] see figure 1 , to prepare BaZr 0.2 Ti 0.8 o 3 The barium zirconate titanate ceramic material comprises the steps:

[0041] (1) Ingredients

[0042] Using electronic balance to weigh high-purity BaCO 3 34.5121 grams, ZrO 2 4.3115 grams, TiO 2 11.1787 grams;

[0043] (2) ball mill

[0044] Pour the powder into a ball mill jar, add 65 grams of zirconia balls and 80 ml of deionized water, and perform planetary ball milling at 500 rpm for 2 hours; it should be noted that since the zirconia balls are spherical, they cannot be accurately weighed. It is also difficult to accurately weigh deionized water, so in the examples, deionized water and zirconia balls are weighed in integers.

[0045] (3) drying

[0046] The slurry after ball milling is poured into a porcelain dish, placed in an oven and baked at 80°C for 24 hours;

[0047] (4) pre-burning

[0048] Pour the dried powder into an agate mortar and grind it for 3 minutes, then place it in a resistance furnace, an...

Embodiment 2

[0058] see figure 1 , to prepare BaZr 0.5 Ti 0.5 o 3 The barium zirconate titanate ceramic material comprises the steps:

[0059] (1) Ingredients

[0060] Using electronic balance to weigh high-purity BaCO 3 39.462 g, ZrO 2 6.161 g, TiO 2 3.991 grams;

[0061] (2) ball mill

[0062] Pour the powder into a ball mill jar, add 60 grams of zirconia balls and 100 ml of deionized water, and grind the planetary ball for 0.5 hours at 1000 rpm;

[0063] (3) drying

[0064] The slurry after ball milling is poured into a porcelain dish, placed in an oven and baked at 100°C for 24 hours;

[0065] (4) pre-burning

[0066] Pour the dried powder into an agate mortar and grind it for 3 minutes, then place it in a resistance furnace, and use an intelligent temperature regulator to control the temperature rise and fall program of the resistance furnace, so that the temperature in the furnace will rise from room temperature to 1150°C at a constant speed within 300 minutes Finally, ke...

Embodiment 3

[0076] see figure 1 , to prepare BaZr 0.05 Ti 0.95 o 3 The barium zirconate titanate ceramic material comprises the steps:

[0077] (1) Ingredients

[0078] Using electronic balance to weigh high-purity BaCO 3 39.6603 grams, ZrO 2 1.2384 g, TiO 2 15.2535 grams;

[0079] (2) ball mill

[0080] Pour the powder into a ball mill jar, add 90 grams of zirconia balls and 112ml of deionized water, and grind the planetary ball for 10 hours at a speed of 100 rpm;

[0081] (3) drying

[0082] The slurry after ball milling is poured into a porcelain dish, placed in an oven and baked at 90°C for 24 hours;

[0083] (4) pre-burning

[0084] Pour the dried powder into an agate mortar and grind it for 3 minutes, then place it in a resistance furnace, and use an intelligent temperature regulator to control the temperature rise and fall program of the resistance furnace, so that the temperature in the furnace will rise from room temperature to 1250°C at a constant speed within 300 min...

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Abstract

The invention discloses a method for preparing a BZT ceramic material, comprising the following steps of batching, primary ball milling, primary drying, preburning, secondary ball milling, secondary drying, forming, glue discharging and sintering so that the BZT ceramic material with the chemical formula of BaZrxTi(1-x)O3 is prepared. The ceramic material has good structure, appearance and dielectric property on the precondition of low cost. The BZT ceramic material prepared by the method has good dielectric nonlinearity and high specific inductivity, is not easy to be tired, has adjustable Curie temperature, high compression strength, and can be widely applied to the fields such as a dielectric phase shifter, a voltage-controlled filter, a pyroelectric infrared detector, and a dram.

Description

technical field [0001] The invention relates to a method for preparing a ceramic material, in particular to a method for preparing a barium zirconate titanate ceramic material. Background technique [0002] The dielectric nonlinearity of ferroelectric materials refers to the property that the polarization intensity changes nonlinearly with the applied electric field intensity, so the dielectric constant changes with the applied electric field. The dielectric nonlinearity of ferroelectric materials can be used to manufacture many components such as dielectric amplifiers, frequency multipliers, pulse oscillators, AC voltage stabilizers, and frequency modulators, especially new components such as dielectric phase shifters and voltage-controlled filters. . In order to improve the performance of these components, it is desirable that the ferroelectric materials used have strong dielectric nonlinearity and low loss. [0003] At present, the most important dielectric nonlinear ma...

Claims

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Application Information

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IPC IPC(8): C04B35/468C04B35/49C04B35/622
Inventor 符春林蔡苇陈华强
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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