Method for preparing 0-3 magnetic-electricity composite ceramic through low-temperature sintering realized by induction of nanometer sintering additive through self-propagating

A nano-sintering aid and magnetoelectric composite technology, applied in the field of magnetoelectric composite materials, can solve the problems of difficult polarization of ceramics, unsatisfactory magnetoelectric properties, large dielectric loss of granular magnetoelectric composite ceramics, etc., and achieve high magnetoelectricity Coupling effect, large magnetoelectric coupling coefficient, low cost effect

Active Publication Date: 2015-05-13
江阴智产汇知识产权运营有限公司
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Problems solved by technology

However, in order to obtain a higher density, the solid-state reaction method requires a higher sintering temperature, which leads to serious interdiffusion between the ferroelectric phase and the ferromagnetic phase during the sintering process, so that the dielectric loss of the prepared granular magnetoelectric composite ceramics is biased. Large, forming conductive paths, ceramics are difficult to polarize, and the magnetoelectric properties are not ideal (Zhou Jianping, He Hongcai, Shi Zhan, Nan Cewen, PMNNT / CoFe 2 o 4 Structure and magnetoelectric properties of composite materials, Journal of Ceramics, 2006, 34(10): 1213-1219; Y.J.Li, X.M.Chen, Y.Q.Lin, Y.H.Tang, Magnetoelectric effect of Ni 0.8 Zn 0.2 Fe 2 o 4 / Sr 0.5 Ba 0.5 Nb 2 o 6 composites, Journal of the European Ceramic Society, 2006, 26, 2839-2844)

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  • Method for preparing 0-3 magnetic-electricity composite ceramic through low-temperature sintering realized by induction of nanometer sintering additive through self-propagating
  • Method for preparing 0-3 magnetic-electricity composite ceramic through low-temperature sintering realized by induction of nanometer sintering additive through self-propagating
  • Method for preparing 0-3 magnetic-electricity composite ceramic through low-temperature sintering realized by induction of nanometer sintering additive through self-propagating

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Experimental program
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Effect test

Embodiment 1

[0028] (1) According to the stoichiometric ratio of 0.55Pb(Ni 1 / 3 Nb 2 / 3 )O 3 -0.05PbHfO 3 -0.4PbTiO 3 (PNNHT), weigh B-site oxides NiO, Nb 2 o 5 , HfO 2 and TiO 2 , grind and mix evenly, pre-calcine at 1100°C for 4h; the calcined product is crushed and ground, add stoichiometric PbO, grind and mix evenly, and calcined at 850°C for 4h to obtain ferroelectric phase PNNHT. According to the stoichiometric Ni 0.875 Zn 0.125 Fe 2 o 4 (NZF), weigh NiO, ZnO and Fe 2 o 3 , ground and mixed evenly, and calcined at 1150°C for 4 hours to obtain ferromagnetic phase NZF.

[0029] (2)①Weigh a certain mass of PNNHT ferroelectric phase. Weigh out the amount of PNNHT substance with 2.5 mol% Na 2 WO 4 2H 2 O, put into deionized water and heat and stir until completely dissolved. Weigh citric acid and CTAB, the mass ratio of citric acid to CTAB is 9:1, the mass ratio of CTAB to the sum of the mass of PNNHT and sodium tungstate dihydrate is 1:4, heat and stir in deionized water ...

Embodiment 2

[0037] Change the metering ratio of PNNHT material among the embodiment 1 to be 0.6Pb (Ni 1 / 3 Nb 2 / 3 )O 3 -0.05PbHfO 3 -0.35PbTiO 3 (PNNHT), change the metering ratio of NZF material among the embodiment 1 to be Ni 0.88 Zn 0.12 Fe 2 o 4 , using the same method as in Example 1 to prepare ferroelectric phase, ferromagnetic phase and PNNHT / NZF composite ceramics.

Embodiment 3

[0039] Change the stoichiometric ratio of PNNHT material in embodiment 1 to be 0.5Pb (Ni 1 / 3 Nb 2 / 3 )O 3 -0.05PbHfO 3 -0.45PbTiO 3 (PNNHT), change the metering ratio of NZF material among the embodiment 1 to be Ni 0.94 Zn 0.06 Fe 2 o 4 , using the same method as in Example 1 to prepare ferroelectric and ferromagnetic phases, and changing the ratio of ferroelectric and ferromagnetic phases to 90:10 and using the same method as in Example 1 to prepare PNNHT / NZF composite ceramics.

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Abstract

The invention belongs to the field of magnetic-electricity composite materials and provides a method for preparing 0-3 magnetic-electricity composite ceramic through low-temperature sintering realized by induction of a nanometer sintering additive through self-propagating. Surfaces of a ferroelectric-phase particle and a ferromagnetic-phase particle are coated with nanometer WO3 and CuO respectively through a self-propagating process, then the coated ferroelectric-phase particle and the ferromagnetic-phase particle are uniformly mixed and subjected to solid-phase sintering, and the magnetic-electricity composite ceramic is prepared. The method has the advantages that (1), due to the introduction of the nanometer sintering additive, 0-3 particle composite ceramic with high density can be prepared through low-temperature sintering; (2), mutual diffusion of a ferroelectric-phase body and a ferromagnetic-phase body is effectively prevented, and the prepared 0-3 particle magnetic-electricity composite ceramic presents a high magneto-electricity coupling effect and has a large electro-electricity coupling coefficient; (3), a technological process is simple, the cost is low, and the method is applicable to preparation of other kinds of 0-3 particle magnetic-electricity composite ceramic.

Description

technical field [0001] The invention belongs to the field of magnetoelectric composite materials, in particular to a method for preparing 0-3 ferroelectric / ferromagnetic particle composite ceramics by low-temperature sintering. Background technique [0002] Multiferroic materials (ferroelectricity, ferromagnetism...) not only have a single ferrotype, but also produce new composite effects through the coupling of ferrotypes. Ferroelectric / ferromagnetic materials (magnetoelectric materials) are the most typical representatives. This material not only has ferroelectricity and ferromagnetism, but also produces a new property - magnetoelectric coupling effect. Multiferroic materials greatly broaden the application range of ferroic materials, and can realize the energy conversion between magnetism-force-electricity or electricity-force-magnetism, and have broad application prospects in magneto-force-electricity converters and magnetic sensors. . [0003] Due to the special requi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/26C04B35/622C04B35/63C04B35/64
Inventor 方必军刘星杜庆柏丁建宁
Owner 江阴智产汇知识产权运营有限公司
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