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Pyroelectric single crystal material of PMN-PT and application thereof

A technology of lead magnesium niobate and single crystal materials, which is applied in the directions of polycrystalline material growth, single crystal growth, single crystal growth, etc., and can solve the problem of large pyroelectric performance, limiting the use range of pyroelectric detectors, and pyroelectric Problems with low coefficients

Inactive Publication Date: 2008-10-29
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

[0004] In single crystal materials, the thermal diffusivity of LT is too large, it is difficult to improve the lateral thermal time constant of the pyroelectric detector, and its low pyroelectric coefficient and low permittivity are not suitable for the detector array. Small-area detectors; the TGS series has relatively high pyroelectric coefficient and small thermal diffusivity, but it is easy to hydrolyze and needs to be sealed for use, and because the Curie temperature of the material is only about 49°C, the pyroelectric performance changes greatly with temperature , very inconvenient to process and use
These performance limitations of pyroelectric materials greatly limit the scope of use of pyroelectric detectors

Method used

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  • Pyroelectric single crystal material of PMN-PT and application thereof
  • Pyroelectric single crystal material of PMN-PT and application thereof

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Experimental program
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Embodiment 1

[0032] PbO, Pb with a purity greater than 99.99% 3 o 4 , MgO, Nb 2 o 5 ,TiO 2 The raw material powder is made into a mixed raw material according to the chemical formula of 0.70PMN-0.30PT, and the PMNT single crystal is grown by the Bridgman method, and it can be prepared after being oriented along the with an XRD diffraction directional instrument, and polarized along the direction. Pyroelectric materials with excellent pyroelectric properties are used to prepare infrared detection and imagers.

Embodiment 2

[0034] PbO, Pb with a purity greater than 99.99% 3 o 4 , MgO, Nb 2 o 5 ,TiO 2 The raw material powder is made into a mixed raw material according to the chemical formula of 0.76PMN-0.24PT, and the PMNT single crystal is grown by the Bridgman method, and the XRD diffraction directional instrument is oriented along the , cut, and polarized along the direction. Pyroelectric materials with excellent pyroelectric properties are used to prepare infrared detection and imagers.

[0035] Table 1

[0036]

[0037] Table 2

[0038] Material

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Abstract

The invention relates to a Pb(Mg1 / 3Nb2 / 3) O3-PbTiO3 (PMNT) thermal release electric single-crystal material and its use, wherein the material has a composition of (1-x)PMN-xPT.

Description

technical field [0001] The invention relates to a lead magnesium niobate-lead titanate pyroelectric single crystal material and an application thereof, belonging to the field of pyroelectric single crystals. Background technique [0002] Lead magnesium niobate-lead titanate (PMNT) single crystal has excellent piezoelectricity, electromechanical coupling performance and high The field-induced strain makes it have huge and extensive application prospects in ultrasonic transducers, drivers and sensor devices, and Luo Haosu et al. have successfully achieved mass production of high-quality PMNT single crystals using the Bridgman method (ZL 99 1 13472.9), which greatly promoted the research on PMNT single crystals. Research on the high electro-optic properties of PMNT single crystals at a composition x of around 0.38 and in the <001> direction is also ongoing. However, the application of PMNT single crystals in pyroelectric devices has not been reported so far. [0003] S...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/32C30B29/30
Inventor 罗豪甦赵祥永唐艳学徐海清贺天厚林迪
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI