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High-performance sodium niobate-based leadless pyroelectric ceramic material, and preparation method and application thereof

A pyroelectric ceramic, lead-free heat technology, applied in the field of infrared detection materials, can solve the problems of comparable performance, restrict development and application, affect the sensitivity of infrared detectors, etc., and achieve the effect of excellent performance and high depolarization temperature.

Inactive Publication Date: 2019-10-22
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the high dielectric loss will cause a lot of noise in the actual application process of the material, which will affect the sensitivity of the infrared detector, thus restricting its further development and application in the field of infrared imaging.
For practical application, the material needs to have high depolarization temperature, low dielectric loss and high pyroelectric performance at the same time. Although lead-free materials have made great progress in pyroelectricity, the performance is still not comparable to commercial PZT is comparable, so it is necessary to further optimize the performance to obtain materials with excellent pyroelectric performance, high depolarization temperature and low dielectric loss

Method used

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  • High-performance sodium niobate-based leadless pyroelectric ceramic material, and preparation method and application thereof
  • High-performance sodium niobate-based leadless pyroelectric ceramic material, and preparation method and application thereof
  • High-performance sodium niobate-based leadless pyroelectric ceramic material, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] (1) Preparation of (1-x)NaNbO 3 -xBa 0.6 (Bi 0.5 K 0.5 ) 0.4 TiO 3 +1mol%MnCO 3 , the component shown by x=0.05. First according to (1-x)NaNbO 3 -xBa 0.6 (Bi 0.5 K 0.5 ) 0.4 TiO 3 +1mol%MnCO 3 , x=0.05 stoichiometric ratio takes raw material Na 2 CO 3 Powder, Nb 2 o 5 Powder, BaCO 3 Powder, Bi 2 o 3 Powder, K 2 CO 3 Powder, TiO 2 Powder, MnCO 3 Powder, the purity of all raw materials is greater than 99.0%. The wet ball milling method is used for mixing for 24 hours to make the components uniformly mixed, the ball milling medium is zirconium balls, and the solvent is absolute ethanol. Raw materials used: alcohol: zirconium ball ratio is 1: (0.8-1.2): (4-6). Drying, compression molding, and calcination synthesis to obtain (1-x)NaNbO 3 -xBa 0.6 (Bi 0.5 K 0.5 ) 0.4 TiO 3 +1mol%MnCO 3 , x=0.05 solid solution powder. During the synthesis process, the heating rate is 1-3°C / min, the synthesis temperature is 850-1050°C, and the holding time is 1-...

Embodiment 2

[0042] The composition of the material is (1-x)NaNbO 3 -xBa 0.6 (Bi 0.5 K 0.5 ) 0.4 TiO 3 +1mol%MnCO 3 , x=0.10, repeat the preparation method of Example 1 according to the above formula to obtain a polarized pyroelectric ceramic element, and measure the dielectric and pyroelectric properties of the polarized sample without an external electric field.

Embodiment 3

[0044] The composition of the material is (1-x)NaNbO 3 -xBa 0.6 (Bi 0.5 K 0.5 ) 0.4 TiO 3 +1mol%MnCO 3 , x=0.15, repeat the preparation method of Example 1 according to the above formula to obtain a polarized pyroelectric ceramic element, and measure the dielectric and pyroelectric properties of the polarized sample without an external electric field.

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Abstract

The invention relates to a high-performance sodium niobate-based leadless pyroelectric ceramic material, and a preparation method and an application thereof. The chemical composition of the sodium niobate-based leadless pyroelectric ceramic material is (1-x)NaNbO3-xBa0.6(Bi0.5K0.5)0.4 TiO3 + 1 mol% MnCO3, wherein x is equal to or more than 0 and equal to or less than 0.20.

Description

technical field [0001] The invention relates to a high-performance sodium niobate-based lead-free pyroelectric ceramic material and its preparation method and application, belonging to the field of infrared detection materials. Background technique [0002] The pyroelectric effect is the electrical effect of pyroelectric materials on temperature changes. It has been studied for a long time. Due to this characteristic, pyroelectric materials are used in thermal imaging, laser detection, radiometers, infrared detectors, fire alarms, etc. It has a wide range of applications in fields such as detectors and military detectors, and its application in energy harvesting has also attracted widespread attention in recent years. Among them, the pyroelectric material is the core component of the infrared detector, and its working modes include intrinsic pyroelectric mode and dielectric-pyroelectric mode. Intrinsic pyroelectric mode mainly utilizes the charge generated by the change of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/499C04B35/622C04B35/626
CPCC04B35/499C04B35/622C04B35/62605C04B2235/3201C04B2235/3215C04B2235/3262C04B2235/3298C04B2235/6562C04B2235/6567C04B2235/9607
Inventor 董显林周明星梁瑞虹
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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