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Lead zirconate titanate pyroelectric ceramic material and preparation method thereof

A technology of pyroelectric ceramics and lead zirconate titanate, which is applied in the field of lead zirconate titanate pyroelectric ceramic materials and its preparation, can solve the problems of low pyroelectric coefficient, high dielectric loss, and large dielectric constant. Achieve the effect of high pyroelectric coefficient, low dielectric constant and low dielectric constant

Active Publication Date: 2015-08-19
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to provide a lead zirconate titanate pyroelectric ceramic material for the technical problems of high dielectric loss, low pyroelectric coefficient and relatively large dielectric constant of pure PZT ceramic materials in the prior art.

Method used

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  • Lead zirconate titanate pyroelectric ceramic material and preparation method thereof
  • Lead zirconate titanate pyroelectric ceramic material and preparation method thereof
  • Lead zirconate titanate pyroelectric ceramic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1 (Pb 1.005 )(Fe 1 / 2 Nb 1 / 2 ) 0.20 (Zr 0.85 Ti 0.15 ) 0.80 o 3 +0.5at.%Mn+0.5at.%Al

[0020] Weigh Pb according to the stoichiometric ratio 3 o 4 , ZrO 2 、TiO 2 , Fe 2 o 3 , Nb 2 o 5 , MnCO 3 and Al 2 o 3 For the raw material powder, add 0.8 times the total weight of the raw material in deionized water, and ball mill and mix for 24 hours (wherein, the weight ratio of powder:ball:water is 1:1.5:0.8), so that the components are mixed evenly. Dry it, add 10wt.% deionized water and compact it, raise the temperature to 830°C at a rate of 2°C / min and keep it warm for 2 hours to obtain a ceramic powder.

[0021] Crush the ceramic powder, pass through a 30-mesh sieve, and then use wet ball milling for 24 hours (wherein the weight ratio of powder: ball: water is 1:2:0.4), dry the powder, and then add 6wt. %PVA binder; granulation, aging for 24 hours, passing through a 30-mesh sieve, pre-pressing and then 0.8MPa isostatic pressing, and discharging at...

Embodiment 2

[0023] Embodiment 2 (Pb 1.005 )(Fe 1 / 2 Nb 1 / 2 ) 0.20 (Zr 0.85 Ti 0.15 ) 0.80 o 3 +5.0at.%Mn+0.3at.%Al

[0024] The preparation method of Example 1 was repeated according to the above formula, except that the sintering temperature was 1100° C., and other conditions remained unchanged.

Embodiment 3

[0025] Embodiment 3 (Pb1.005 )(Fe 1 / 2 Nb 1 / 2 ) 0.15 (Zr 0.85 Ti 0.15 ) 0.85 o 3 +0.5at.%Mn+0.5at.%Si

[0026] The preparation method of Example 1 was repeated according to the above formula, except that the sintering temperature was 1250° C., and other conditions remained unchanged.

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Abstract

The invention discloses a lead zirconate titanate pyroelectric ceramic material and a preparation method thereof. The formula of the material is (Pb1+delta)(Fe1 / 2Nb1 / 2)y(ZrxTi1-x)1-yO3+wA+vB, and is named as PFN-PZT ceramic material for short, wherein A is multi valence state cation such as Mn; B is single valence state cation such as Si or Al; delta is 0-0.05; x is 0.80-0.95; y is 0.15-0.30; w is 0-0.1; v is 0-0.1. The PFN-PZT ceramic material disclosed by the invention is prepared by preparing powder by using a conventional solid phase method, performing an isostatic pressure forming process and performing hot pressing sintering in oxygen atmosphere. The PFN-PZT ceramic material has high pyroelectricity coefficient, moderate dielectric constant and low dielectric consumption; the specific resistance of the material is adjustable within the range of 10<11>-10<13>omega cm; the density of the ceramic is greater than the theoretical density of 99%; the ceramic material can be applied to the field of infrared detection in voltage modes.

Description

technical field [0001] The invention belongs to the technical field of information functional ceramic materials, and in particular relates to a lead zirconate titanate pyroelectric ceramic material and a preparation method thereof. Background technique [0002] Uncooled infrared focal plane detectors have been a research hotspot in the past 30 years. In the manufacture of uncooled infrared focal plane detectors, there are many types of pyroelectric sensitive element materials, which can be divided into two categories from the working mode: intrinsic pyroelectric materials that work below the Curie temperature (Tc) and dielectric bolometer materials operating near the Curie temperature (Tc). Since the intrinsic pyroelectric material is far away from the Curie temperature and utilizes the spontaneous polarization of the material itself, the detector does not need a bias electric field and a thermostat, so the device structure is simple, the manufacture is convenient, and the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/493C04B35/622
Inventor 姚春华郭少波董显林曹菲陈建和
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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