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Barium strontium titanate-lead titanate pyroelectric ceramic and preparation method thereof

A technology of pyroelectric ceramics and barium strontium titanate, which is applied in the field of pyroelectric ceramics to achieve the effects of low production cost, easy chemical composition, and uniform composition of sintered materials

Inactive Publication Date: 2012-06-20
NINGBO UNIV
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  • Summary
  • 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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  • Barium strontium titanate-lead titanate pyroelectric ceramic and preparation method thereof
  • Barium strontium titanate-lead titanate pyroelectric ceramic and preparation method thereof
  • Barium strontium titanate-lead titanate pyroelectric ceramic and preparation method thereof

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Embodiment 1

[0018] Barium strontium titanate-lead titanate binary ceramics (0.9Ba 0.65 Sr 0.35 TiO 3 -0.1PbTiO 3 ) The composition formula is: Ba 0.65 Sr 0.35 TiO 3 : 90atm%, PbTiO 3 : 10atm%, the process of preparing single-component pyroelectric ceramic materials from the binary system of the above composition formula is as follows:

[0019] (1) weigh lead nitrate, barium nitrate and strontium nitrate by the above-mentioned chemical formula ratio, be dissolved in deionized water at normal temperature, then add the citric acid that is 1: 2 with the metal ion mol ratio to obtain a mixed solution; The chemical formula is to weigh butyl titanate and dissolve it in ethylene glycol to obtain a butyl titanate solution; mix the above mixed solution with the butyl titanate solution, stir for 1 hour, and then adjust its pH to 7-9 with dilute nitric acid. , to obtain a barium strontium titanate-lead titanate precursor solution; put the barium strontium titanate-lead titanate precursor solut...

Embodiment 2

[0027] Barium strontium titanate-lead titanate ceramics (0.8Ba 0.55 Sr 0.45 TiO 3 -0.2PbTiO 3 ) The composition formula is: Ba 0.55 Sr 0.45 TiO 3 : 80 atm%, PbTiO 3 : 20 atm%, the process of preparing single-component pyroelectric ceramic materials from the binary system of the above composition formula is as follows:

[0028] (1) weigh lead nitrate, barium nitrate and strontium nitrate by the above-mentioned chemical formula ratio, be dissolved in deionized water at normal temperature, then add the citric acid that is 1: 2 with the metal ion mol ratio to obtain a mixed solution; The chemical formula is to weigh butyl titanate and dissolve it in ethylene glycol to obtain a butyl titanate solution; mix the above mixed solution with the butyl titanate solution, stir for 2 hours, and then adjust its pH 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 solutio...

Embodiment 3

[0034] Mn-doped barium strontium titanate-lead titanate (Mn-doped 0.9Ba 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%, externally doped with Mn (NO 3 ) 2 Molarity 2 atm%. The process of preparing the single-component pyroelectric ceramic material from the binary system of the above composition formula is as follows:

[0035] (1) weigh lead nitrate, barium nitrate and strontium nitrate by the above-mentioned chemical formula ratio, be dissolved in deionized water at normal temperature, then add the citric acid that is 1: 2 with the metal ion mol ratio to obtain a mixed solution; The chemical formula is to weigh butyl titanate and dissolve it in ethylene glycol to obtain a butyl titanate solution; mix the above mixed solution with the butyl titanate solution, stir for 1 hour, and then adjust its pH to 7-9 with dilute nitric acid. , to obtain the barium strontium titanate-lead titanate precursor solution; p...

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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 strontium barium titanate-lead titanate pyroelectric ceramic and a preparation method thereof. Background technique [0002] Pyroelectric infrared sensors use the pyroelectric effect of materials to detect infrared radiation energy, work at room temperature, and have high detection sensitivity, independent of radiation wavelength, and pyroelectric devices respond quickly and are easy to apply. Pyroelectric infrared sensor is 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, radiometer, 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 cost high. Compared with pyroele...

Claims

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Application Information

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Patent Type & Authority Applications(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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