Single-phase multiferroic ceramic material and preparation method thereof

Abstract

The invention relates to a single-phase multiferroic ceramic material and a preparation method of the single-phase multiferroic ceramic material. The material and the method aim at solving the technical problem of week ferromagnetism of the conventional single-phase multiferroic material bismuth ferrite. A chemical expression of the single-phase multiferroic ceramic material is (1-x)Ba(Zr0.2Ti0.8)O3-x(Ba0.7Ca0.3)(Fe0.5Ta0.5)O3, wherein x is equal to 0.2-0.4. The preparation method comprises the steps of performing wet ball-milling on barium carbonate powder, calcium carbonate powder, titanium dioxide powder, ferric oxide powder, tantalum pentoxide powder and zirconium dioxide powder after mixing, putting in a pipe furnace for presintering after drying, then performing the wet ball-milling again, after drying, adding an adhesive agent, pressing into a prefabricated body, and sintering the prefabricated body in the pipe furnace, so as to obtain the single-phase multiferroic ceramic material. The single-phase multiferroic ceramic material is in a tetragonal phase perovskite structure at a room temperature, has ferromagnetism and ferroelectricity simultaneously and can be used for the fields of electricity and electronics.

Description

technical field

[0001] The invention relates to single-phase multiferroic ceramics and a preparation method thereof. Background technique

[0002] Multiferroic materials refer to materials with two or more ferroic properties at the same time. The ferroic properties mainly include ferroelectricity, ferromagnetism, ferroelasticity and ferrovorticity, and the most studied multiferroic materials are magnetic and ferroelectric properties. Coexisting magnetoelectric multiferroic materials. In magnetoelectric multiferroic materials, there is a certain coupling effect between magnetism and ferroelectricity, which has broad application prospects in the fields of information storage, spintronic devices, capacitor-inductor integrated devices and microwave absorption technology. However, single-phase multiferroic materials with coexistence of ferromagnetism and ferroelectricity at room temperature are relatively rare, which to some extent limits the pace of research on the application ...

Examples

specific Embodiment approach 1

[0030] Specific embodiment one: the chemical expression of the single-phase multiferroic ceramic material of this embodiment is (1-x)Ba(Zr 0.2 Ti 0.8 )O 3 –x(Ba 0.7 Ca 0.3 )(Fe 0.5 Ta 0.5 )O 3 , where x=0.2~0.4, abbreviated as BXT.

specific Embodiment approach 2

[0031] Specific embodiment two: the preparation method of the single-phase multiferroic ceramic material described in specific embodiment one, carries out according to the following steps:

[0032] 1. Barium carbonate (BaCO 3 ), calcium carbonate (CaCO 3 ), titanium dioxide (TiO 2 ), ferric oxide (Fe 2 o 3 ), tantalum pentoxide (Ta 2 o 5 ) and zirconium dioxide (ZrO 2 ) powder according to

[0033] (1-x)Ba(Zr 0.2 Ti 0.8 )O 3 –x(Ba 0.7 Ca 0.3 )(Fe 0.5 Ta 0.5 )O 3 The stoichiometric ratio is weighed and mixed uniformly to obtain a mixed powder, wherein x=0.2~0.4;

[0034] 2. Add alcohol to the mixed powder obtained in step 1, and ball mill in a ball mill at a speed of 200-400rpm for 12-48 hours to obtain a suspension A;

[0035] 3. Dry the suspension A obtained in step 2 to obtain powder A, and then put the powder A into a tube furnace and keep it at a temperature of 1100-1250°C for 3-6 hours to obtain a pre-calcined powder ;

[0036] 4. Add alcohol to the calc...

specific Embodiment approach 3

[0039] Embodiment 3: This embodiment differs from Embodiment 2 in that the drying temperature in Step 2 is 80° C. to 100° C. Others are the same as Embodiment 2.

technical field

[0001] The invention relates to single-phase multiferroic ceramics and a preparation method thereof. Background technique

[0002] Multiferroic materials refer to materials with two or more ferroic properties at the same time. The ferroic properties mainly include ferroelectricity, ferromagnetism, ferroelasticity and ferrovorticity, and the most studied multiferroic materials are magnetic and ferroelectric properties. Coexisting magnetoelectric multiferroic materials. In magnetoelectric multiferroic materials, there is a certain coupling effect between magnetism and ferroelectricity, which has broad application prospects in the fields of information storage, spintronic devices, capacitor-inductor integrated devices and microwave absorption technology. However, single-phase multiferroic materials with coexistence of ferromagnetism and ferroelectricity at room temperature are relatively rare, which to some extent limits the pace of research on the application ...

Examples

specific Embodiment approach 1

[0030] Specific embodiment one: the chemical expression of the single-phase multiferroic ceramic material of this embodiment is (1-x)Ba(Zr 0.2 Ti 0.8 )O 3 –x(Ba 0.7 Ca 0.3 )(Fe 0.5 Ta 0.5 )O 3 , where x=0.2~0.4, abbreviated as BXT.

specific Embodiment approach 2

[0031] Specific embodiment two: the preparation method of the single-phase multiferroic ceramic material described in specific embodiment one, carries out according to the following steps:

[0032] 1. Barium carbonate (BaCO 3 ), calcium carbonate (CaCO 3 ), titanium dioxide (TiO 2 ), ferric oxide (Fe 2 o 3 ), tantalum pentoxide (Ta 2 o 5 ) and zirconium dioxide (ZrO 2 ) powder according to

[0033] (1-x)Ba(Zr 0.2 Ti 0.8 )O 3 –x(Ba 0.7 Ca 0.3 )(Fe 0.5 Ta 0.5 )O 3 The stoichiometric ratio is weighed and mixed uniformly to obtain a mixed powder, wherein x=0.2~0.4;

[0034] 2. Add alcohol to the mixed powder obtained in step 1, and ball mill in a ball mill at a speed of 200-400rpm for 12-48 hours to obtain a suspension A;

[0035] 3. Dry the suspension A obtained in step 2 to obtain powder A, and then put the powder A into a tube furnace and keep it at a temperature of 1100-1250°C for 3-6 hours to obtain a pre-calcined powder ;

[0036] 4. Add alcohol to the calc...

specific Embodiment approach 3

[0039] Embodiment 3: This embodiment differs from Embodiment 2 in that the drying temperature in Step 2 is 80° C. to 100° C. Others are the same as Embodiment 2.

Images