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Coprecipitation preparation method for calcium barium zirconate titanate leadless piezoelectric ceramic material

A technology of barium calcium zirconate titanate and ceramic materials, which is applied in the field of ceramic materials, can solve problems such as harsh reaction conditions, lower reaction temperature, and difficult operation, and achieve the effects of low cost, high activity, and simple process

Inactive Publication Date: 2017-11-07
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, there is a report on the synthesis of BCZT ceramic materials by hydrothermal method. Compared with the solid-state method, the reaction temperature is significantly lower, and the required powder can be directly obtained below 300 ° C. However, the hydrothermal method has harsh reaction conditions, difficult operation, The reaction has some disadvantages such as danger

Method used

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  • Coprecipitation preparation method for calcium barium zirconate titanate leadless piezoelectric ceramic material
  • Coprecipitation preparation method for calcium barium zirconate titanate leadless piezoelectric ceramic material
  • Coprecipitation preparation method for calcium barium zirconate titanate leadless piezoelectric ceramic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. 2.7941g (10.83mmol) Ba(CH) with a purity of 99% 3 COO) 2 , 0.3416g (1.9mmol) Ca(CH) with a purity of 98% 3 COO) 2 ·H 2 O was completely dissolved in 100 mL of distilled water to obtain A-site precursor solution; 0.4316 g (1 mmol) of Zr (NO 3 ) 4 ·5H 2 O, 1.7420g (9mmol) TiCl 4 Completely dissolve in 100mL of distilled water to obtain the B-position precursor solution; add the B-position precursor solution dropwise to 100mL of 8mol / L NaOH aqueous solution, stir well at room temperature, then add the A-position precursor solution dropwise, and stir at room temperature after the dropwise addition Evenly, the temperature was raised to 90 °C, and the reaction was stirred at a constant temperature for 4 hours. After the reaction was completed, it was aged at room temperature for 24 hours. Centrifugal washing with deionized water until the supernatant was neutral, suction filtration, and the filter cake was dried at 60 °C. Grind and pass through a 160-mesh sieve to o...

Embodiment 2

[0029] In step 1 of this example, 2.6471 g (10.2 mmol) of Ba(CH 3 COO) 2 , 0.3236g (1.8mmol) Ca(CH) with a purity of 98% 3 COO) 2 ·H 2 O was completely dissolved in 100 mL of distilled water to obtain A-site precursor solution; 0.4316 g (1 mmol) of Zr (NO 3 ) 4 ·5H 2 O, 1.7420g (9mmol) TiCl 4 It was completely dissolved in 100 mL of distilled water to obtain a precursor liquid at position B; other steps were the same as those in Example 1 to obtain a lead-free piezoelectric ceramic material of barium calcium zirconate titanate.

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Abstract

The invention discloses a coprecipitation preparation method for a calcium barium zirconate titanate leadless piezoelectric ceramic material. The method comprises the following steps: using barium acetate, calcium acetate, zirconium nitrate and titanium tetrachloride as raw materials, using sodium hydroxide or potassium hydroxide as a precipitator, firstly preparing calcium barium zirconate titanate precursor powder with high purity, uniform particles and relatively high activity, and then carrying out presintering, pelleting, tabletting, glue arrangement and sintering on the precursor to obtain the calcium barium zirconate titanate leadless piezoelectric ceramic material. Presintered powder of the ceramic material is prepared by adopting a coprecipitation method, the technology is simple and low in cost, no impurity is unlikely to introduce in the whole process, the prepared presintered powder is high in purity, uniform in dispersion, uniform in shape and relatively high in activity, the sintering temperature is reduced, and meanwhile the sintering temperature of the ceramic material can also be reduced, so that the problem that a traditional solid-phase method is non-uniform in mechanical mixing, unlikely to introduce impurities and high in synthesis temperature is solved.

Description

technical field [0001] The invention belongs to the technical field of ceramic materials, and particularly relates to a preparation method of a barium calcium zirconate titanate lead-free piezoelectric ceramic material with high purity, uniform particles and high activity. Background technique [0002] BaTiO 3 (BT) is the first class of lead-free piezoelectric ceramic materials studied in PbZrO 3 -PbTiO 3 It has been widely used before its discovery, but its use has been limited due to its low Curie temperature and piezoelectric properties. In the past ten years, people have been using BaTiO 3 Based on this, the BT materials were explored by ion substitution, adding new components and improving the preparation process, so that ceramic materials were used as piezoelectric materials, and important research progress was made. In 2009, the development of BT-based piezoelectric ceramics made another important breakthrough, (Ba 0.85 Ca 0.15 )(Zr 0.1 Ti 0.9 )O 3 (BCZT) was...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/49C04B35/622C04B35/626
CPCC04B35/49C04B35/622C04B35/62635C04B35/6264C04B2235/3208C04B2235/3215C04B2235/449
Inventor 杨祖培陈晓芳晁小练
Owner SHAANXI NORMAL UNIV
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