La0.1Bi0.9FeO3/BiY2Fe5O12 magnetoelectric composite powder and preparation method thereof

Abstract

The invention discloses La0.1Bi0.9FeO3 / BiY2Fe5O12 magnetoelectric composite powder and a preparation method thereof. The method comprises the following steps: adding analytically pure Fe(NO3)3.9H2O, Bi(NO3)3.9H2O, La(NO3)3.6H2O and Y(NO3)3.6H2O to distilled water to prepare into a solution according to a chemical general formula of xLa0.1Bi0.9FeO3 / (1-x)BiY2Fe5O12, wherein x is mass percent of La0.1Bi0.9FeO3, and smaller than or equal to 0.9 and greater than equal to 0.6; adding citric acid to the solution; evenly stirring, and adjusting the pH value, so as to obtain even sol B; drying the sol B, and burning to obtain the magnetoelectric composite powder. The method for rapidly preparing bismuth ferrite magnetoelectric composite powder at low temperature is simple in technology, an energy source is saved, and the prepared magnetoelectric composite powder is good in uniformity.

Description

technical field

[0001] The invention belongs to the field of material science, in particular to a La 0.1 Bi 0.9 FeO 3 / BiY 2 Fe 5 o 12 Magnetoelectric composite powder and its preparation method. Background technique

[0002] With the rapid development of mobile communication and computer technology, various electronic devices have become more highly integrated, multi-functional, miniaturized and responsive. Since the miniaturization and miniaturization of electronic equipment is an inevitable trend, there is an urgent need for a material to have two or more properties at the same time, so as to reduce the consumption of limited space on the circuit board and further realize miniaturization. Based on this, magnetoelectric materials with both ferroelectricity and ferromagnetism came into being. However, there are very few types of magnetoelectric single-phase materials.

[0003] In most cases, people combine ferroelectric materials with ferromagnetic materials, and th...

Examples

Embodiment 1

[0036] 1) According to the general chemical formula xLa 0.1 Bi 0.9 FeO 3 / (1-x)BiY 2 Fe 5 o 12 , will analyze pure Fe(NO 3 ) 3 9H 2 O, Bi(NO 3 ) 3 9H 2 O, La(NO 3 ) 3 ·6H 2 O and Y (NO 3 ) 3 ·6H 2 O was added to distilled water to prepare a solution; where, x was La 0.1 Bi 0.9 FeO 3 The mass percentage of , and x=0.9;

[0037] 2) Add citric acid to the solution in step 1), and stir for 1 hour under heating in a water bath at 80°C to obtain sol A. 2 times the total molar mass of ions;

[0038] 3) Under stirring, use ethylenediamine to adjust the pH value of sol A to 6.5 to obtain uniform sol B;

[0039] 4) Put sol B into a vacuum drying oven and dry at 200°C for 2 hours to obtain a dark brown loose xerogel;

[0040] 5) Grind the dry gel and put it into a crucible, and place the crucible in an electric furnace for calcination at 800°C for 1 hour to obtain La 0.1 Bi 0.9 FeO 3 / BiY 2 Fe 5 o 12 Magnetoelectric composite powder.

[0041] The La prepared ...

Embodiment 2

[0046] 1) According to the general chemical formula xLa 0.1 Bi 0.9 FeO 3 / (1-x)BiY 2 Fe 5 o 12 , will analyze pure Fe(NO 3 ) 3 9H 2 O, Bi(NO 3 ) 3 9H 2 O, La(NO 3 ) 3 ·6H 2 O and Y (NO 3 ) 3 ·6H 2 O was added to distilled water to prepare a solution; where, x was La 0.1 Bi 0.9 FeO 3 The mass percentage of , and x=0.8;

[0047] 2) Add citric acid to the solution in step 1), and stir for 1 hour under heating in a water bath at 100°C to obtain sol A, wherein the molar amount of citric acid added is the four metals in the solution: iron ion, bismuth ion, lanthanum ion, and yttrium ion 3 times the total molar mass of ions;

[0048] 3) Under stirring, use ethylenediamine to adjust the pH value of Sol A to 7.5 to obtain uniform Sol B;

[0049] 4) Put Sol B into a vacuum drying oven and dry at 190°C for 3 hours to obtain a dark brown loose xerogel;

[0050] 5) Put the dry gel into a crucible after grinding, and place the crucible in an electric furnace for calcin...

Embodiment 3

[0056] 1) According to the general chemical formula xLa 0.1 Bi 0.9 FeO 3 / (1-x)BiY 2 Fe 5 o 12 , will analyze pure Fe(NO 3 ) 3 9H 2 O, Bi(NO 3 ) 3 9H 2 O, La(NO 3 ) 3 ·6H 2 O and Y (NO 3 ) 3 ·6H 2 O was added to distilled water to prepare a solution; where, x was La 0.1 Bi 0.9 FeO 3 The mass percentage of , and x=0.7;

[0057] 2) Add citric acid to the solution in step 1), and stir for 2 hours under heating in a water bath at 90°C to obtain Sol A, wherein the molar amount of citric acid added is the four metals in the solution: iron ion, bismuth ion, lanthanum ion, and yttrium ion 4 times the total molar mass of ions;

[0058] 3) Under stirring, use ethylenediamine to adjust the pH value of sol A to 7 to obtain uniform sol B;

[0059] 4) Put Sol B into a vacuum drying oven and dry at 180°C for 4 hours to obtain a dark brown loose xerogel;

[0060] 5) Put the dry gel into a crucible after being ground, and place the crucible in an electric furnace for calc...

technical field

[0001] The invention belongs to the field of material science, in particular to a La 0.1 Bi 0.9 FeO 3 / BiY 2 Fe 5 o 12 Magnetoelectric composite powder and its preparation method. Background technique

[0002] With the rapid development of mobile communication and computer technology, various electronic devices have become more highly integrated, multi-functional, miniaturized and responsive. Since the miniaturization and miniaturization of electronic equipment is an inevitable trend, there is an urgent need for a material to have two or more properties at the same time, so as to reduce the consumption of limited space on the circuit board and further realize miniaturization. Based on this, magnetoelectric materials with both ferroelectricity and ferromagnetism came into being. However, there are very few types of magnetoelectric single-phase materials.

[0003] In most cases, people combine ferroelectric materials with ferromagnetic materials, and th...

Examples

Embodiment 1

[0036] 1) According to the general chemical formula xLa 0.1 Bi 0.9 FeO 3 / (1-x)BiY 2 Fe 5 o 12 , will analyze pure Fe(NO 3 ) 3 9H 2 O, Bi(NO 3 ) 3 9H 2 O, La(NO 3 ) 3 ·6H 2 O and Y (NO 3 ) 3 ·6H 2 O was added to distilled water to prepare a solution; where, x was La 0.1 Bi 0.9 FeO 3 The mass percentage of , and x=0.9;

[0037] 2) Add citric acid to the solution in step 1), and stir for 1 hour under heating in a water bath at 80°C to obtain sol A. 2 times the total molar mass of ions;

[0038] 3) Under stirring, use ethylenediamine to adjust the pH value of sol A to 6.5 to obtain uniform sol B;

[0039] 4) Put sol B into a vacuum drying oven and dry at 200°C for 2 hours to obtain a dark brown loose xerogel;

[0040] 5) Grind the dry gel and put it into a crucible, and place the crucible in an electric furnace for calcination at 800°C for 1 hour to obtain La 0.1 Bi 0.9 FeO 3 / BiY 2 Fe 5 o 12 Magnetoelectric composite powder.

[0041] The La prepared ...

Embodiment 2

[0046] 1) According to the general chemical formula xLa 0.1 Bi 0.9 FeO 3 / (1-x)BiY 2 Fe 5 o 12 , will analyze pure Fe(NO 3 ) 3 9H 2 O, Bi(NO 3 ) 3 9H 2 O, La(NO 3 ) 3 ·6H 2 O and Y (NO 3 ) 3 ·6H 2 O was added to distilled water to prepare a solution; where, x was La 0.1 Bi 0.9 FeO 3 The mass percentage of , and x=0.8;

[0047] 2) Add citric acid to the solution in step 1), and stir for 1 hour under heating in a water bath at 100°C to obtain sol A, wherein the molar amount of citric acid added is the four metals in the solution: iron ion, bismuth ion, lanthanum ion, and yttrium ion 3 times the total molar mass of ions;

[0048] 3) Under stirring, use ethylenediamine to adjust the pH value of Sol A to 7.5 to obtain uniform Sol B;

[0049] 4) Put Sol B into a vacuum drying oven and dry at 190°C for 3 hours to obtain a dark brown loose xerogel;

[0050] 5) Put the dry gel into a crucible after grinding, and place the crucible in an electric furnace for calcin...

Embodiment 3

[0056] 1) According to the general chemical formula xLa 0.1 Bi 0.9 FeO 3 / (1-x)BiY 2 Fe 5 o 12 , will analyze pure Fe(NO 3 ) 3 9H 2 O, Bi(NO 3 ) 3 9H 2 O, La(NO 3 ) 3 ·6H 2 O and Y (NO 3 ) 3 ·6H 2 O was added to distilled water to prepare a solution; where, x was La 0.1 Bi 0.9 FeO 3 The mass percentage of , and x=0.7;

[0057] 2) Add citric acid to the solution in step 1), and stir for 2 hours under heating in a water bath at 90°C to obtain Sol A, wherein the molar amount of citric acid added is the four metals in the solution: iron ion, bismuth ion, lanthanum ion, and yttrium ion 4 times the total molar mass of ions;

[0058] 3) Under stirring, use ethylenediamine to adjust the pH value of sol A to 7 to obtain uniform sol B;

[0059] 4) Put Sol B into a vacuum drying oven and dry at 180°C for 4 hours to obtain a dark brown loose xerogel;

[0060] 5) Put the dry gel into a crucible after being ground, and place the crucible in an electric furnace for calc...

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