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Doped and modified barium strontium calcium titanate heat-release pyroelectric ceramic material and preparation method thereof

A technology of pyroelectric ceramics and barium strontium titanate, which is applied in the field of barium strontium titanate calcium pyroelectric ceramic materials and its preparation, can solve the problems of dielectric and pyroelectric performance degradation, and achieve a large dielectric constant, The effect of simple process and high pyroelectric performance

Active Publication Date: 2011-05-18
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

However, when the grain size is reduced, its dielectric and pyroelectric properties will decrease again, so there is a contradiction between fine grain size and high pyroelectric performance

Method used

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  • Doped and modified barium strontium calcium titanate heat-release pyroelectric ceramic material and preparation method thereof
  • Doped and modified barium strontium calcium titanate heat-release pyroelectric ceramic material and preparation method thereof
  • Doped and modified barium strontium calcium titanate heat-release pyroelectric ceramic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] First, according to the general formula (Ba 0.6 Sr 0.3 Ca 0.1 ) 0.993 Y 0.007 Ti 0.999 mn 0.001 o 3 Weigh out the stoichiometric BaCO 3 , SrCO 3 , CaCO 3 、TiO 2 , Y 2 o 3 and MnCO 3 For each powder, use a wet ball milling process to mix all the powders evenly; the mass ratio of ball milling material to ball milling medium and deionized water is 1:1.5:1.2, and the ball milling time is 18 hours. The ball milling medium is steel ball, zirconium ball or agate ball.

[0034]Dry, add the deionized water of 10% weight of total powder, briquette, synthesize under atmospheric atmosphere, synthesis temperature is 1100 ℃, and holding time is 2 hours, obtains composition as (Ba 0.6 Sr 0.3 Ca 0.1 ) 0.993 Y 0.007 Ti 0.999 mn 0.001 o 3 The powder; pulverize, cross 40 mesh sieves, and then use the wet ball milling process to mix the powder evenly; the mass ratio of ball milling material to ball milling medium and deionized water is 1: 1.8: 0.7, and the ball milling...

Embodiment 2

[0043] The difference between this embodiment and embodiment 1 is only: according to the general formula (Ba 0.6 Sr 0.3 Ca 0.1 ) 0.991 Y 0.009 Ti 0.999 mn 0.001 o 3 Weigh out the stoichiometric BaCO 3 , SrCO 3 , CaCO 3 、TiO 2 , Y 2 o 3 and MnCO 3 Each powder.

[0044] The remaining content of this embodiment is the same as that described in Example 1, and the performance test results of the prepared samples are shown in Table 1.

Embodiment 3

[0046] The difference between this embodiment and embodiment 1 is only: according to the general formula (Ba 0.6 Sr 0.3 Ca 0.1 ) 0.995 Y 0.005 Ti 0.999 mn 0.001 o 3 Weigh out the stoichiometric BaCO 3 , SrCO 3 , CaCO 3 、TiO 2 , Y 2 o 3 and MnCO 3 Each powder.

[0047] The remaining content of this embodiment is the same as that described in Example 1, and the performance test results of the prepared samples are shown in Table 1.

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Abstract

The invention discloses a doped and modified barium strontium calcium titanate heat-release pyroelectric ceramic material which has the composition formula of (Ba0.6Sr0.3Ca0.1)1-xYxTi0.999Mn0.001O3, wherein x is equal to 0.001 to 0.010. The heat-release pyroelectric ceramic material disclosed in the invention is prepared by adopting a simple solid phase method powder preparing and atmosphere sintering process. The barium strontium calcium titanate pyroelectric ceramic material which is doped and modified by Y and Mn not only has small grain size and large dielectric constant but also has higher pyroelectric performance, can meet the performance requirement for manufacturing a non-refrigerating infrared focal plane device and effectively solves the contradiction between the fine grain sizeand high pyroelectric performance. The preparation method disclosed in the invention has the advantages of simple process, no need of special equipment, low cost, and the like, is suitable for mass production and can meet the industrialized demand.

Description

technical field [0001] The invention relates to a barium strontium calcium titanate pyroelectric ceramic material and a preparation method thereof, in particular to a barium strontium calcium titanate pyroelectric ceramic material modified by Y and Mn doping and a preparation method thereof The invention belongs to the technical field of pyroelectric ceramic materials. Background technique [0002] Infrared focal plane array technology includes cooling type and uncooled type. The cooling type is represented by the narrow bandgap semiconductor mercury cadmium telluride material, and the uncooled type includes two main types: pyroelectric type and microbolometer. The pyroelectric infrared focal plane array technology has become one of the focuses of the current infrared focal plane imaging technology research and application due to its advantages of no refrigeration, wide response spectrum, low power consumption, miniaturization, high reliability, and wide application range. ...

Claims

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Application Information

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IPC IPC(8): C04B35/468C04B35/622
Inventor 董显林曹盛王根水毛朝梁姚春华
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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