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Lead lanthanum zirconate titanate ceramic powder as well as preparation method and application thereof

A technology of lead lanthanum zirconate titanate and ceramic powder, which is applied in the field of lead lanthanum zirconate titanate ceramic powder and its preparation, can solve the problems of low precursor concentration, long reaction time, and easy agglomeration of powder, and achieve powder High purity, uniform crystal grains, and high sintering activity

Pending Publication Date: 2020-02-28
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The powder prepared by the sol-gel method has precise composition, easy control of composition, and high purity, but it needs to be calcined at high temperature, and the powder is easy to agglomerate during the calcining process
The existing hydrothermal preparation process of lead lanthanum zirconate titanate ceramic powder generally has too high reaction temperature, too long reaction time, and low precursor concentration leads to low yield

Method used

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  • Lead lanthanum zirconate titanate ceramic powder as well as preparation method and application thereof
  • Lead lanthanum zirconate titanate ceramic powder as well as preparation method and application thereof
  • Lead lanthanum zirconate titanate ceramic powder as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. According to Pb 0.94 La 0.06 Zr 0.52 Ti 0.48 Accurate stoichiometric ratio, weigh 17.7390g of lead acetate and 0.8543g of lanthanum acetate, pour it into 30ml of deionized water, and magnetically stir for 10min under heating in a water bath at 75°C to obtain an aqueous solution of lead and lanthanum;

[0035] 2. Weigh 10.9501g of zirconium n-propoxide and 7.5015g of tetrabutyl titanate into 30ml of absolute ethanol, and magnetically stir for 20min under heating in a water bath at 75°C to obtain a zirconium-titanium alcohol solution;

[0036] 3. Pour the zirconium-titanium alcohol solution into the lead-lanthanum aqueous solution, stir magnetically for 20 minutes under heating in a water bath at 75°C, and cool to room temperature to prepare a lead-lanthanum zirconate titanate mixture;

[0037] 4. In order to make the concentration of potassium hydroxide in the prepared precursor solution 2mol / L, weigh 6.2345g of potassium hydroxide and pour it into the lead zircona...

Embodiment 2

[0041] 1. According to Pb 0.94 La 0.06 Zr 0.63 Ti 0.37 Accurate stoichiometric ratio Weigh 17.7390g of lead acetate and 0.8543g of lanthanum acetate into 30ml of deionized water, and magnetically stir for 10min under heating in a water bath at 75°C to obtain an aqueous solution of lead and lanthanum;

[0042] 2. Weigh 13.2665g of zirconium n-propoxide and 5.7824g of tetrabutyl titanate into 30ml of absolute ethanol, and stir magnetically for 20min under heating in a water bath at 75°C to prepare a zirconium-titanium alcohol solution;

[0043] 3. Pour the zirconium-titanium alcohol solution into the lead-lanthanum aqueous solution, stir magnetically for 20 minutes under heating in a water bath at 75°C, and cool to room temperature to prepare a lead-lanthanum zirconate titanate mixed solution;

[0044] 4. In order to make the concentration of potassium hydroxide in the prepared precursor solution 3mol / L, weigh 9.3517g of potassium hydroxide and pour it into the lead zirconate...

Embodiment 3

[0048] 1. According to Pb 0.94 La 0.06 Zr 0.95 Ti 0.05 Accurate stoichiometric ratio Weigh 17.7390g of lead acetate and 0.8543g of lanthanum acetate into 30ml of deionized water, and magnetically stir for 10min under heating in a water bath at 75°C to obtain an aqueous solution of lead and lanthanum;

[0049] 2. Weigh 20.0050g of zirconium n-propoxide and 0.7814g of tetrabutyl titanate into 30ml of absolute ethanol, and stir magnetically for 20min under heating in a water bath at 75°C to prepare a zirconium-titanium alcohol solution;

[0050] 3. Pour the zirconium-titanium alcohol solution into the lead-lanthanum aqueous solution, stir magnetically for 20 minutes under heating in a water bath at 75°C, and cool to room temperature to prepare a lead-lanthanum zirconate titanate mixed solution;

[0051] 4. In order to make the concentration of potassium hydroxide in the prepared precursor solution 3mol / L, weigh 9.3517g of potassium hydroxide and pour it into the lead zirconate...

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Abstract

The invention belongs to the technical field of inorganic non-metallic materials, and discloses lead lanthanum zirconate titanate ceramic powder as well as a preparation method and application thereof. The molecular formula of the lead lanthanum zirconate titanate ceramic is Pb<x>La<1-x>Zr<y>Ti <1-y>, x is equal to 0.94, and y is equal to 0.52-0.95; the preparation method comprises the following steps: dissolving lead acetate and lanthanum acetate in deionized water to obtain a lead-lanthanum aqueous solution, and dissolving zirconium n-propoxide and tetrabutyl titanate in absolute ethyl alcohol to obtain a zirconium-titanium alcohol solution; adding the zirconium-titanium alcohol solution into the lead-lanthanum aqueous solution, and stirring to obtain a lead lanthanum zirconate titanatemixed solution; under magnetic stirring, adding potassium hydroxide into the lead lanthanum zirconate titanate mixed solution to obtain a lead lanthanum zirconate titanate turbid liquid precursor; andcarrying out hydrothermal reaction on the precursor at 160-180 DEG C to obtain a lead lanthanum zirconate titanate slurry, centrifuging, washing and drying to obtain the lead lanthanum zirconate titanate ceramic powder. The ceramic powder is high in purity, good in dispersity, small and controllable in particle size and high in precursor solution concentration, and can be applied to the fields ofrefrigeration and energy storage.

Description

technical field [0001] The invention belongs to the technical field of inorganic non-metallic materials, and more specifically relates to a lead lanthanum zirconate titanate ceramic powder and a preparation method and application thereof. Background technique [0002] Lead lanthanum zirconate titanate has broad application prospects in electric cards and energy storage due to its excellent ferroelectricity and antiferroelectricity. In the process of preparing energy storage devices, especially in the preparation of multilayer ceramic capacitors, the quality of ceramic powder materials plays a vital role in the performance of the device, among which the microscopic morphology, size, Uniformity, dispersion, etc. are particularly important to the performance of the device. Therefore, the research on lead lanthanum zirconate titanate ceramic powder has become a hot spot. [0003] The particle size of the lead lanthanum zirconate titanate ceramic powder prepared by the traditio...

Claims

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Application Information

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IPC IPC(8): C04B35/491C04B35/626
CPCC04B35/491C04B35/626C04B2235/3227
Inventor 鲁圣国姚丽丽
Owner GUANGDONG UNIV OF TECH
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