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Citric acid aqua process of preparing sheet PZT powder

A technology of citric acid aqueous solution and lead zirconate titanate is applied in the field of preparation of ferroelectric ceramic materials, which can solve the problems of difficult sintering of PZT ceramic materials, expensive raw materials, and difficulty in the source of PZT powder raw materials, and achieves simple equipment and chemical uniformity. Good and easy micro-doping modification effect

Inactive Publication Date: 2007-02-21
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention mainly solves the problem of difficult sintering of PZT ceramic materials prepared by traditional solid-phase sintering, and solves the problem that the source of raw materials for PZT powder prepared by the original sol-gel method is relatively difficult and the raw materials required for the process are relatively expensive. Preparation of PZT-95 / 5 powder

Method used

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  • Citric acid aqua process of preparing sheet PZT powder
  • Citric acid aqua process of preparing sheet PZT powder
  • Citric acid aqua process of preparing sheet PZT powder

Examples

Experimental program
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Effect test

Embodiment 1

[0015] Add 0.3mol citric acid to 150g deionized water, then add 0.055mol lead nitrate (10% excessive compensation heat treatment Pb loss), 0.0473mol zirconium nitrate, heat and stir in a water bath at 70°C for 2 hours to form a white emulsion, then add 0.0025mol positive Tetrabutyl titanate was stirred for 0.5 hours, and ammonia water was added to adjust the pH to 6.5, and the emulsion gradually became clear. Continue heating and stirring in a water bath for 8 hours to obtain a colorless and transparent homogeneous sol. Dry the prepared precursor in a drying oven at 150°C, and bake it in a drying oven at 250°C after the water is completely volatilized until it burns. After the combustion, the powder is heat-treated in a muffle furnace at 800°C for 1.5 hours to obtain powder needed.

Embodiment 2

[0017] Add 0.18 mol of citric acid to 100 g of deionized water, then add 0.033 mol of lead nitrate (10% excess compensation for heat treatment Pb loss), 0.0285 mol of zirconium nitrate, heat and stir in a 70°C water bath for 1.5 hours to form a white emulsion, and then add 0.0015 mol of Tetrabutyl orthotitanate was stirred for 1 hour, and ammonia water was added to adjust the pH to 7.5, and the emulsion gradually became clear. Continue heating and stirring in a water bath for 7 hours to obtain a colorless, transparent and uniform sol. Dry the prepared precursor in a drying oven at 170°C, and bake it in a drying oven at 240°C after the water is completely volatilized until it burns. After the combustion, the powder is heat-treated in a muffle furnace at 700°C for 2 hours to obtain powder needed.

[0018] From figure 1 It can be seen that the prepared PZT95 / 5 is sheet-like with a single shape; from figure 2 It can be seen that the XRD of the prepared powder is consistent wit...

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Abstract

The citric acid aqua process of preparing sheet lead zirconate-titanate (PZT) powder belongs to the field of ferroelectric ceramic material preparation technology and is superior to traditional solid sintering process and sol-gel process. The citric acid aqua process of preparing PZT-95 / 5 powder includes first precursor preparation through adding lead nitrate and zirconium nitrate into water solution of citric acid, heating, stirring before adding alkoxide, and regulating pH value to obtain homogeneous and stable sol; and subsequent powder preparation through drying the precursor, stoving to burn and heat treatment of the burnt powder. The process of the present invention is simple, feasible and cheap in material, and expects to be used in industrial production.

Description

technical field [0001] The invention relates to the preparation of ferroelectric ceramic materials, in particular to the preparation of lead zirconate titanate (PZT) powder. Background technique [0002] Due to the stress-induced ferroelectric-antiferroelectric phase transition under lower pressure, PZT-95 / 5 ceramic material can release the high-density electric energy stored in the ferroelectric state, so this material has been used since the 1950s. Since it came out in the United States at the end of the 1990s, it has been defined as a transducer material for special occasions. Using shock waves to act on such samples to obtain high energy pulses has broad application prospects in the field of high-energy research. Related material research work has also been carried out in China, such as the electrical response of transducer materials, load matching, and high-pressure compression ratio. problems, and a lot of work has been done on engineering applications. [0003] The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/491C04B35/624
Inventor 乔利杰潘德安何健英
Owner UNIV OF SCI & TECH BEIJING
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