Preparation method of barium strontium titanate-lead titanate pyroelectric ceramic

A technology of pyroelectric ceramics and barium strontium titanate, which is applied in the field of pyroelectric ceramics to achieve the effects of simple preparation method, high pyroelectric coefficient, and high Curie temperature

Inactive Publication Date: 2013-07-31
NINGBO UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far there are no published reports on barium strontium titanate-lead titanate ceramics for pyroelectric materials

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  • Preparation method of barium strontium titanate-lead titanate pyroelectric ceramic
  • Preparation method of barium strontium titanate-lead titanate pyroelectric ceramic

Examples

Experimental program
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Embodiment 1

[0016] Barium strontium titanate-lead titanate binary ceramics (0.9Ba 0.65 Sr 0.35 TiO 3 -0.1PbTiO 3 ) composition formula is: Ba 0.65 Sr 0.35 TiO 3 :90atm%, PbTiO 3 : 10atm%, the process for preparing single-component pyroelectric ceramic materials from the binary system elements of the above composition formula is as follows:

[0017] (1) Weigh lead nitrate, barium nitrate and strontium nitrate according to the proportion of the above chemical formula, dissolve them in deionized water at room temperature, and then add citric acid with a molar ratio of 1:2 to the metal ion to obtain a mixed solution; Dissolve butyl titanate in ethylene glycol to obtain butyl titanate solution; mix the above mixed solution with butyl titanate solution and stir for 1 hour, then adjust its pH value to 7-9 with dilute nitric acid , to obtain the strontium barium titanate-lead titanate precursor solution; put the strontium barium titanate-lead titanate precursor solution into an oven, and d...

Embodiment 2

[0025] Barium strontium titanate-lead titanate ceramics (0.8Ba 0.55 Sr 0.45 TiO 3 -0.2PbTiO 3 ) composition formula is: Ba 0.55 Sr 0.45 TiO 3 :80atm%, PbTiO 3 : 20atm%, the process for preparing single-component pyroelectric ceramic materials from the binary system element of the above composition formula is as follows:

[0026] (1) Weigh lead nitrate, barium nitrate and strontium nitrate according to the proportion of the above chemical formula, dissolve them in deionized water at room temperature, and then add citric acid with a molar ratio of 1:2 to the metal ion to obtain a mixed solution; Dissolve butyl titanate in ethylene glycol to obtain butyl titanate solution; mix the above mixed solution with butyl titanate solution and stir for 2 hours, then adjust its pH value to 7-9 with dilute nitric acid , to obtain the barium strontium titanate-lead titanate precursor solution; put the barium strontium titanate-lead titanate precursor solution into an oven, and dry it a...

Embodiment 3

[0032] Mn-doped strontium barium titanate-lead titanate (Mn-doped0.9Ba 0.5 Sr 0.5 TiO 3 -0.1PbTiO 3 ) Ceramic composition formula is: Ba 0.5 Sr 0.5 TiO 3 :90atm%, PbTiO 3 :10atm%, doped with Mn(NO 3 ) 2 The molar concentration is 2atm%. The process of preparing a single-component pyroelectric ceramic material from the binary system elements of the above composition formula is as follows:

[0033] (1) Weigh lead nitrate, barium nitrate and strontium nitrate according to the proportion of the above chemical formula, dissolve them in deionized water at room temperature, and then add citric acid with a molar ratio of 1:2 to the metal ion to obtain a mixed solution; Dissolve butyl titanate in ethylene glycol to obtain butyl titanate solution; mix the above mixed solution with butyl titanate solution and stir for 1 hour, then adjust its pH value to 7-9 with dilute nitric acid , to obtain the strontium barium titanate-lead titanate precursor solution; put the strontium bari...

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Abstract

The invention discloses a barium strontium titanate-lead titanate pyroelectric ceramic and a preparation method thereof, the preparation method comprises the steps of: (1) dissolving lead nitrate, barium nitrate and strontium nitrate in deionized water according to a chemical formula proportion of (1-y)Ba1-xSrxTiO3-yPbTiO3, and adding citric acid with mol ratio to metal ions of 1:2 to prepare a mixed solution; dissolving butyl titanate in ethylene glycol to obtain a butyl titanate solution; blending and stirring the mixed solution with the butyl titanate solution, and regulating the pH value to obtain a precursor solution; and drying the precursor solution to gel; (2) calcining the gel in a muffle furnace to synthesize barium strontium titanate-lead titanate powder; (3) pressing the barium strontium titanate-lead titanate powder to a blank body, and sintering the blank body under the protection of lead atmosphere to prepare the barium strontium titanate-lead titanate pyroelectric ceramic. The preparation method of the invention has the advantages that a proper dosage of PT is doped on a BST ceramic base to prepare a composite ferroelectric ceramic relaxation material with better performance; and the method has the advantages of greatly reducing the synthesis temperature of the powder perovskite phase, reducing the dimensions of the powder granules for an order of magnitude, and guaranteeing the uniform distribution of the granules.

Description

technical field [0001] The invention relates to a pyroelectric ceramic, in particular to a method for preparing a strontium barium titanate-lead titanate pyroelectric ceramic. Background technique [0002] The pyroelectric infrared sensor uses the pyroelectric effect of the material to detect infrared radiation energy, works at room temperature, has high detection sensitivity, and has nothing to do with the radiation wavelength, and the pyroelectric device responds quickly and is easy to apply. Pyroelectric infrared sensors are currently one of the most widely used sensors in military and industrial applications such as remote sensing, guidance, night vision, active radar, thermal imaging, gas analysis, radiometers, and temperature measurement. Pyroelectric infrared sensor materials can be divided into single crystal materials, ceramic materials and polymer films. Pyroelectric single crystal materials have excellent performance but are often difficult to prepare and high in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/468C04B35/622
Inventor 张约品王实现王冲夏海平
Owner NINGBO UNIV
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