Multielement composite pyroelectric ceramic material and preparation method thereof

A technology of pyroelectric ceramics and multi-element compounding, which is applied in the field of materials, can solve the problems that new quaternary composite pyroelectric ceramic systems are rarely reported.

Inactive Publication Date: 2015-06-24
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, new quaternary composite pyroelectric ceramic systems with high pyroelectri

Method used

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  • Multielement composite pyroelectric ceramic material and preparation method thereof
  • Multielement composite pyroelectric ceramic material and preparation method thereof
  • Multielement composite pyroelectric ceramic material and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0029] Embodiment 1 of the present invention provides a novel quaternary multi-component composite pyroelectric ceramic material, whose general chemical formula is: xPb(Me1 / 3 Nb 2 / 3 )O 3 -yPb(Fe 1 / 2 Nb 1 / 2 )O 3 -zPb(Zr 0.9 Ti 0.1 )O 3 -mMe';

[0030] Among them, Me is one of Mn or Zn; x, y, z are molar coefficients respectively, 0.01≤x≤0.07, 0.01≤y≤0.07, 0.9≤z≤0.92, and x+y+z=1; Me ' is a modified metal element, m is a molar coefficient, and 0≤m≤5mol%.

[0031] Me' may include, but is not limited to, one or more of Cr, Ce, Li or La.

[0032] The novel quaternary multi-component composite pyroelectric ceramic material xPb(Me 1 / 3 Nb 2 / 3 )O 3 -yPb(Fe 1 / 2 Nb 1 / 2 )O 3 -zPb(Zr 0.9 Ti 0.1 )O 3 -mMe' (can be abbreviated as PMnN-PFN-PZT or PZN-PFN-PZT) has a higher pyroelectric coefficient (λ=5×10 -8 C·cm -2 ·K -1 ~20×10 -8 C·cm -2 ·K -1 ), the appropriate dielectric constant ε r (100-500) and lower dielectric loss tanδ (0.005-0.030), and these properties are ad...

Embodiment 2

[0034] This embodiment provides the preparation method of the pyroelectric ceramic material in the above-mentioned embodiment 1, such as figure 1 shown, including:

[0035] Step 201, the Fe 2 o 3 and Nb 2 o 5 Mix ball milling at 1:1 molar ratio, dry and then calcinate and grind to make FeNbO 4 Precursor powder; the Mn 2 CO 3 and Nb 2 o 5 or ZnO and Nb 2 o 5 One group of them was ball-milled at a molar ratio of 1:1, dried and then calcined and ground to make MnNb 2 o 6 or ZnNb 2 o 6 Precursor powder;

[0036] Step 202, Pb 3 o 4 , ZrO 2 、TiO 2 , FeNbO 4 Precursor powder, MnNb 2 o 6 or ZnNb 2 o 6 Precursor powder and the oxide or salt of the modified metal element Me', according to the general chemical formula xPb(Me 1 / 3 Nb 2 / 3 )O 3 -yPb(Fe 1 / 2 Nb 1 / 2 )O 3 -zPb(Zr 0.9 Ti 0.1 )O 3 The mol ratio of -mMe' is weighed, then mixed and ball milled to obtain the slurry;

[0037] Wherein, the Me' includes one or more of Cr, Ce, Li or La.

[0038] Step 203...

Embodiment 3

[0051] Will Mn 2 CO 3 and Nb 2 o 5 Mix and ball mill at a molar ratio of 1:1, dry and then calcinate and grind to make MnNb 2 o 6 Precursor powder; the Fe 2 o 3 and Nb 2 o 5 Mix and ball mill at 1:1 molar ratio, dry and then calcinate and grind to make FeNbO 4 Precursor powder. will Pb 3 o 4 , ZrO 2 、TiO 2 , MnNb 2 o 6 Precursor powder and FeNbO 4 Precursor powder according to 0.05Pb(Mn 1 / 3 Nb 2 / 3 )O 3 -0.03Pb(Fe 1 / 2 Nb 1 / 2 )O 3 -0.92Pb(Zr 0.9 Ti 0.1 )O 3 Weigh the molar ratio, add anhydrous ethanol medium to mix and ball mill, dry and sieve, and pre-calcine at 750°C for 2 hours. Ball mill and dry the block obtained after pre-calcination, add 5% PVA to granulate, age for 6 hours, and press it into a green body with a diameter of 15mm and a thickness of about 1.5mm after sieving. Sintering at 1120° C. for 2.5 hours to obtain a ceramic body. After grinding, polishing, and silvering the obtained ceramic body, it was polarized in 140°C silicone oil with ...

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Abstract

The invention discloses a multielement composite pyroelectric ceramic material and a preparation method thereof. The chemical general formula of the material is xPb(Me1/3Nb2/3)O3-yPb(Fe1/2Nb1/2)O3-zPb(Zr0.9Ti0.1)O3-mMe', wherein Me is one of Mn or Zn; x, y and z are respectively a mole coefficient, x is greater than or equal to 0.01 and less than or equal to 0.07, y is greater than or equal to 0.01 and less than or equal to 0.07, z is greater than or equal to 0.9 and less than or equal to 0.92, and x + y + z = 1; and Me' is a modifying metal element, m is a mole coefficient, and m is greater than or equal to 0 mol % and less than or equal to 5 mol %. The multielement composite pyroelectric ceramic material provided by the invention has a high pyroelectric coefficient, proper dielectric properties and a low dielectric loss, and the electrical properties can be adjusted, therefore, the multielement composite pyroelectric ceramic material has a good prospect in devices such as pyroelectric detectors and the like.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a novel quaternary multi-component composite pyroelectric ceramic material and a preparation method thereof. Background technique [0002] Due to a series of advantages such as stable physical and chemical properties and excellent comprehensive electrical properties, pyroelectric ceramic materials are widely used in the fields of infrared detectors, thermal imaging systems, and direct conversion of thermoelectric energy. Zirconium-rich lead zirconate titanate (PZT) ceramics is a commonly used pyroelectric material. The system has a low-temperature ferroelectric rhombohedral phase (F RL ) to high temperature ferroelectric rhombohedral phase (F RH ) first-order phase transition. This F RL –F RH The phase transition temperature is much lower than the ferroelectric-paraelectric phase transition Curie temperature T c , and the dielectric constant ε before and after the phase t...

Claims

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Application Information

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IPC IPC(8): C04B35/493C04B35/622
Inventor 郭栋蔡锴王云丽安钊
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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