CN102584193B - Preparation method of bismuth ferrate barium titanate solid solution composite material with high magnetization intensity and high polarization intensity - Google Patents

Preparation method of bismuth ferrate barium titanate solid solution composite material with high magnetization intensity and high polarization intensity Download PDF

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CN102584193B
CN102584193B CN 201210023356 CN201210023356A CN102584193B CN 102584193 B CN102584193 B CN 102584193B CN 201210023356 CN201210023356 CN 201210023356 CN 201210023356 A CN201210023356 A CN 201210023356A CN 102584193 B CN102584193 B CN 102584193B
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barium titanate
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林营
杨海波
杨艳艳
朱建锋
王芬
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Shaanxi University of Science and Technology
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Abstract

一种高磁化强度和极化强度的铁酸铋钛酸钡固溶体复合材料的制备方法，制备BiY2Fe5O12粉体和0.7BiFeO3-0.3BaTiO3粉体；将0.7BiFeO3-0.3BaTiO3粉体和BiY2Fe5O12粉体混合均匀后加入PVA粘合剂得到所需复合材料的混合粉末；将复合材料的混合粉末按需要压制成型，加热排除粘合剂PVA，然后烧结成瓷，得到高磁化强度和极化强度的铁酸铋钛酸钡固溶体复合材料。本发明能够将铁酸铋钛酸钡固溶体陶瓷的饱和磁化强度从0.03emu/克提高至4.4emu/g。同时，可以将铁酸铋钛酸钡固溶体陶瓷的剩余极化强度从18.6微库/厘米2提高至20.1微库/厘米2。A preparation method of bismuth ferrite barium titanate solid solution composite material with high magnetization and polarization strength, preparing BiY 2 Fe 5 O 12 powder and 0.7BiFeO 3 -0.3BaTiO 3 powder; mixing 0.7BiFeO 3 -0.3BaTiO 3 powder and BiY 2 Fe 5 O 12 powder are mixed evenly, and then the PVA binder is added to obtain the mixed powder of the composite material; Porcelain, bismuth ferrite barium titanate solid solution composite material with high magnetization and polarization. The invention can increase the saturation magnetization of bismuth ferrite barium titanate solid solution ceramics from 0.03emu/g to 4.4emu/g. At the same time, the remanent polarization of the bismuth ferrite barium titanate solid solution ceramics can be increased from 18.6 microstorey/cm 2 to 20.1 microstorey/cm 2 .

Description

The preparation method of the ferrous acid bismuth barium titanate sosoloid matrix material of a kind of high magnetic intensity and polarizability
Technical field
The invention belongs to material science, be specifically related to the preparation method of the ferrous acid bismuth barium titanate sosoloid matrix material of a kind of high magnetic intensity and polarizability.
Background technology
Multi-ferroic material (multiferroic) is a kind ofly to integrate ferroelectric, magnetic order, thus ferroelectricity and magnetic coexistence and material with magneto-electric coupled character.This material complementation pure (anti--) ferroelectric or (anti--) ferromagnetic material deficiency and present the order of electricity and magnetic simultaneously, because the coexistence of ferroelectricity and magnetic makes this material to be induced by electric field and produces magnetic field, iron electric polarization also can be brought out in magnetic field simultaneously, and this character is called as magnetoelectric effect.Electric field can be induced magnetic polarization, and magnetic field can be induced this special functional materials of iron electric polarization will have widely and be used, and concrete the application is mainly reflected in following several respects: modulate mutually to amplitude, polarization and the position of light wave (1); (2) magnetoelectricity data storage and conversion; (3) optical diode; (4) spin wave producer; (5) amplification of spin wave and frequency inverted; (6) wide band magnetic detection and multi-function electronic device such as transmitter, stopper, inductor block, transmodulator etc.; (7) electric current, voltage bidirectional transducer etc.The ferrous acid bismuth is as a kind of typical single phase multi-iron material, have Curie temperature and Ne﹠1﹠el temperature far above room temperature, be present unique single phase multi-iron material that has ferroelectricity and parasitic weak ferromagnetism at ambient temperature simultaneously, therefore, caused numerous investigators' very big concern.Yet the shortcoming of ferrous acid bismuth is that the existence owing to ferrous ion and oxygen room causes big leakage conductance electric current and owing to antiferroelectric essence causes weak magnetic.Above shortcoming has seriously limited the practical application of ferrous acid bismuth material.Though, in the ferrous acid bismuth, introduce barium titanate formation sosoloid and can reduce its leakage current raising ferroelectricity to a certain extent.But the magnetic of the ferrous acid bismuth barium titanate sosoloid that forms still a little less than.Introducing ferromagnetic ferrite in ferrous acid bismuth pottery can significantly improve, yet, because vectolite (CoFe commonly used 2O 4) and the resistivity of nickel-zinc ferrite (NiZn ferrite) lower, if being incorporated into above ferrous acid bismuth barium titanate sosoloid, these two kinds of ferrites form matrix material, though can improve the magnetic property of ferrous acid bismuth barium titanate sosoloid, further reduce polarizability and worsen ferroelectricity thereby can reduce its resistivity.
Summary of the invention
The object of the present invention is to provide the preparation method of the ferrous acid bismuth barium titanate sosoloid matrix material of simple high magnetic intensity of a kind of preparation technology and polarizability.
For achieving the above object, the technical solution used in the present invention is:
1) by the chemical general formula BiY that mixes bismuth ferrous acid yttrium 2Fe 5O 12, take by weighing analytically pure Bi 2O 3, Y 2O 3, and Fe 2O 3Preparation back ball milling 4 hours, oven dry is sieved then, and briquetting through 900 ℃ of pre-burnings 3 hours, was pulverized 120 mesh sieves with the gained bulk sample then and was obtained BiY 2Fe 5O 12Powder;
2) press the chemical general formula 0.7BiFeO of ferrous acid bismuth barium titanate sosoloid 3-0.3BaTiO 3, take by weighing analytically pure BaCO 3, TiO 2, Bi 2O 3And Fe 2O 3Preparation back ball milling 4 hours, oven dry is sieved then, and briquetting through 840 ℃ of pre-burnings 3 hours, is crossed 120 mesh sieves after then the gained bulk sample being pulverized and is obtained 0.7BiFeO 3-0.3BaTiO 3Powder;
3) press chemical general formula xBiY 2Fe 5O 12/ (1-x) (0.7BiFeO 3-0.3BaTiO 3) with 0.7BiFeO 3-0.3BaTiO 3Powder and BiY 2Fe 5O 12Powder mixes, and wherein x is BiY 2Fe 5O 12Mass percent, and 0.05≤x≤0.2;
4) the PVA tackiness agent that adds mixed powder quality 8%～15% in mixed powder obtains the mixed powder of required matrix material;
5) with the mixed powder compression moulding on demand of matrix material, at 550 ℃, be incubated 4 hours and get rid of tackiness agent PVA, became porcelain in 0.5～2 hour, obtain the ferrous acid bismuth barium titanate sosoloid matrix material of high magnetic intensity and polarizability at 1000～1050 ℃ of following sintering.
It is 5% polyvinyl alcohol water solution granulation after 60 orders and 120 eye mesh screens sieve makes that described PVA tackiness agent adopts mass concentration.
The present invention can be increased to 4.4emu/g from the 0.03emu/ gram with the saturation magnetization of ferrous acid bismuth barium titanate solid solution ceramic.Simultaneously, can with the remnant polarization of ferrous acid bismuth barium titanate solid solution ceramic from 18.6 microcoulombs/centimetre 2Be increased to 20.1 microcoulombs/centimetre 2
Description of drawings
Fig. 1 is incubated 0.5 hour sintering gained pure phase 0.7BiFeO down at 1000 ℃ 3-0.3BaTiO 3The magnetic hysteresis loop of pottery.
Fig. 2 works as 0.7BiFeO 3-0.3BaTiO 3Mass ratio be 95%, BiY 2Fe 5O 12Mass ratio be 5%, 1050 ℃ the insulation 0.5 hour sintering gained matrix material magnetic hysteresis loops.
Fig. 3 works as 0.7BiFeO 3-0.3BaTiO 3Mass ratio be 90%, BiY 2Fe 5O 12Mass ratio be 10%, 1050 ℃ the insulation 1 hour sintering gained matrix material magnetic hysteresis loops.
Fig. 4 works as 0.7BiFeO 3-0.3BaTiO 3Mass ratio be 80%, BiY 2Fe 5O 12Mass ratio be 20%, 1050 ℃ the insulation 2 hours sintering gained matrix materials magnetic hysteresis loops.
Fig. 5 is incubated 0.5 hour pure 0.7BiFeO of sintering gained down at 1000 ℃ 3-0.3BaTiO 3The ferroelectric hysteresis loop of pottery.
Fig. 6 works as 0.7BiFeO 3-0.3BaTiO 3Mass ratio be 95%, BiY 2Fe 5O 12Mass ratio be 5%, 1050 ℃ the insulation 0.5 hour sintering gained matrix material ferroelectric hysteresis loops.
Fig. 7 works as 0.7BiFeO 3-0.3BaTiO 3Mass ratio be 90%, BiY 2Fe 5O 12Mass ratio be 10%, 1050 ℃ the insulation 1 hour sintering gained matrix material ferroelectric hysteresis loops.
Fig. 8 works as 0.7BiFeO 3-0.3BaTiO 3Mass ratio be 80%, BiY 2Fe 5O 12Mass ratio be 20%, 1000 ℃ the insulation 2 hours sintering gained matrix materials ferroelectric hysteresis loops.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in further detail.
Embodiment 1:
1) by the chemical general formula BiY that mixes bismuth ferrous acid yttrium 2Fe 5O 12, take by weighing analytically pure Bi 2O 3, Y 2O 3, and Fe 2O 3Preparation back ball milling 4 hours, oven dry is sieved then, and briquetting through 900 ℃ of pre-burnings 3 hours, was pulverized 120 mesh sieves with the gained bulk sample then and was obtained BiY 2Fe 5O 12Powder;
2) press the chemical general formula 0.7BiFeO of ferrous acid bismuth barium titanate sosoloid 3-0.3BaTiO 3, take by weighing analytically pure BaCO 3, TiO 2, Bi 2O 3And Fe 2O 3Preparation back ball milling 4 hours, oven dry is sieved then, and briquetting through 840 ℃ of pre-burnings 3 hours, is crossed 120 mesh sieves after then the gained bulk sample being pulverized and is obtained 0.7BiFeO 3-0.3BaTiO 3Powder;
3) press chemical general formula xBiY 2Fe 5O 12/ (1-x) (0.7BiFeO 3-0.3BaTiO 3) with 0.7BiFeO 3-0.3BaTiO 3Powder and BiY 2Fe 5O 12Powder mixes, and wherein x is BiY 2Fe 5O 12Mass percent, and x=0.05;
4) the PVA tackiness agent that adds mixed powder quality 8% in mixed powder obtains the mixed powder of required matrix material;
It is 5% polyvinyl alcohol water solution granulation after 60 orders and 120 eye mesh screens sieve makes that described PVA tackiness agent adopts mass concentration;
5) with the mixed powder compression moulding on demand of matrix material,, be incubated 4 hours and get rid of tackiness agent PVA, became porcelain in 0.5 hour, obtain the ferrous acid bismuth barium titanate sosoloid matrix material of high magnetic intensity and polarizability at 1050 ℃ of following sintering at 550 ℃.
As seen from Figure 1 the magnetic of pure phase bismuth ferric barium titanate solid solution ceramic very a little less than, saturation magnetization is a 0.03emu/ gram.The saturation magnetization of this matrix material is 1.1emu/g as seen from Figure 2.
Embodiment 2:
1) by the chemical general formula BiY that mixes bismuth ferrous acid yttrium 2Fe 5O 12, take by weighing analytically pure Bi 2O 3, Y 2O 3, and Fe 2O 3Preparation back ball milling 4 hours, oven dry is sieved then, and briquetting through 900 ℃ of pre-burnings 3 hours, was pulverized 120 mesh sieves with the gained bulk sample then and was obtained BiY 2Fe 5O 12Powder;
2) press the chemical general formula 0.7BiFeO of ferrous acid bismuth barium titanate sosoloid 3-0.3BaTiO 3, take by weighing analytically pure BaCO 3, TiO 2, Bi 2O 3And Fe 2O 3Preparation back ball milling 4 hours, oven dry is sieved then, and briquetting through 840 ℃ of pre-burnings 3 hours, is crossed 120 mesh sieves after then the gained bulk sample being pulverized and is obtained 0.7BiFeO 3-0.3BaTiO 3Powder;
3) press chemical general formula xBiY 2Fe 5O 12/ (1-x) (0.7BiFeO 3-0.3BaTiO 3) with 0.7BiFeO 3-0.3BaTiO 3Powder and BiY 2Fe 5O 12Powder mixes, and wherein x is BiY 2Fe 5O 12Mass percent, and x=0.1;
4) the PVA tackiness agent that adds mixed powder quality 10% in mixed powder obtains the mixed powder of required matrix material;
It is 5% polyvinyl alcohol water solution granulation after 60 orders and 120 eye mesh screens sieve makes that described PVA tackiness agent adopts mass concentration;
5) with the mixed powder compression moulding on demand of matrix material,, be incubated 4 hours and get rid of tackiness agent PVA, became porcelain in 1 hour, obtain the ferrous acid bismuth barium titanate sosoloid matrix material of high magnetic intensity and polarizability at 1050 ℃ of following sintering at 550 ℃.
The saturation magnetization of matrix material is the 2.1emu/ gram at this moment as seen from Figure 3.
Embodiment 3:
1) by the chemical general formula BiY that mixes bismuth ferrous acid yttrium 2Fe 5O 12, take by weighing analytically pure Bi 2O 3, Y 2O 3, and Fe 2O 3Preparation back ball milling 4 hours, oven dry is sieved then, and briquetting through 900 ℃ of pre-burnings 3 hours, was pulverized 120 mesh sieves with the gained bulk sample then and was obtained BiY 2Fe 5O 12Powder;
2) press the chemical general formula 0.7BiFeO of ferrous acid bismuth barium titanate sosoloid 3-0.3BaTiO 3, take by weighing analytically pure BaCO 3, TiO 2, Bi 2O 3And Fe 2O 3Preparation back ball milling 4 hours, oven dry is sieved then, and briquetting through 840 ℃ of pre-burnings 3 hours, is crossed 120 mesh sieves after then the gained bulk sample being pulverized and is obtained 0.7BiFeO 3-0.3BaTiO 3Powder;
3) press chemical general formula xBiY 2Fe 5O 12/ (1-x) (0.7BiFeO 3-0.3BaTiO 3) with 0.7BiFeO 3-0.3BaTiO 3Powder and BiY 2Fe 5O 12Powder mixes, and wherein x is BiY 2Fe 5O 12Mass percent, and x=0.2;
4) the PVA tackiness agent that adds mixed powder quality 12% in mixed powder obtains the mixed powder of required matrix material;
It is 5% polyvinyl alcohol water solution granulation after 60 orders and 120 eye mesh screens sieve makes that described PVA tackiness agent adopts mass concentration;
5) with the mixed powder compression moulding on demand of matrix material,, be incubated 4 hours and get rid of tackiness agent PVA, became porcelain in 2 hours, obtain the ferrous acid bismuth barium titanate sosoloid matrix material of high magnetic intensity and polarizability at 1050 ℃ of following sintering at 550 ℃.
The saturation magnetization of matrix material is the 4.4emu/ gram at this moment as seen from Figure 4.
Embodiment 4:
1) by the chemical general formula BiY that mixes bismuth ferrous acid yttrium 2Fe 5O 12, take by weighing analytically pure Bi 2O 3, Y 2O 3, and Fe 2O 3Preparation back ball milling 4 hours, oven dry is sieved then, and briquetting through 900 ℃ of pre-burnings 3 hours, was pulverized 120 mesh sieves with the gained bulk sample then and was obtained BiY 2Fe 5O 12Powder;
2) press the chemical general formula 0.7BiFeO of ferrous acid bismuth barium titanate sosoloid 3-0.3BaTiO 3, take by weighing analytically pure BaCO 3, TiO 2, Bi 2O 3And Fe 2O 3Preparation back ball milling 4 hours, oven dry is sieved then, and briquetting through 840 ℃ of pre-burnings 3 hours, is crossed 120 mesh sieves after then the gained bulk sample being pulverized and is obtained 0.7BiFeO 3-0.3BaTiO 3Powder;
3) press chemical general formula xBiY 2Fe 5O 12/ (1-x) (0.7BiFeO 3-0.3BaTiO 3) with 0.7BiFeO 3-0.3BaTiO 3Powder and BiY 2Fe 5O 12Powder mixes, and wherein x is BiY 2Fe 5O 12Mass percent, and x=0.05;
4) the PVA tackiness agent that adds mixed powder quality 15% in mixed powder obtains the mixed powder of required matrix material;
It is 5% polyvinyl alcohol water solution granulation after 60 orders and 120 eye mesh screens sieve makes that described PVA tackiness agent adopts mass concentration;
5) with the mixed powder compression moulding on demand of matrix material,, be incubated 4 hours and get rid of tackiness agent PVA, became porcelain in 1 hour, obtain the ferrous acid bismuth barium titanate sosoloid matrix material of high magnetic intensity and polarizability at 1050 ℃ of following sintering at 550 ℃.
As seen from Figure 5 the remnant polarization of pure phase bismuth ferric barium titanate solid solution ceramic be 18.7 microcoulombs/centimetre 2
As seen from Figure 6 this moment matrix material remnant polarization be 20.1 microcoulombs/centimetre 2
Embodiment 5:
1) by the chemical general formula BiY that mixes bismuth ferrous acid yttrium 2Fe 5O 12, take by weighing analytically pure Bi 2O 3, Y 2O 3, and Fe 2O 3Preparation back ball milling 4 hours, oven dry is sieved then, and briquetting through 900 ℃ of pre-burnings 3 hours, was pulverized 120 mesh sieves with the gained bulk sample then and was obtained BiY 2Fe 5O 12Powder;
2) press the chemical general formula 0.7BiFeO of ferrous acid bismuth barium titanate sosoloid 3-0.3BaTiO 3, take by weighing analytically pure BaCO 3, TiO 2, Bi 2O 3And Fe 2O 3Preparation back ball milling 4 hours, oven dry is sieved then, and briquetting through 840 ℃ of pre-burnings 3 hours, is crossed 120 mesh sieves after then the gained bulk sample being pulverized and is obtained 0.7BiFeO 3-0.3BaTiO 3Powder;
3) press chemical general formula xBiY 2Fe 5O 12/ (1-x) (0.7BiFeO 3-0.3BaTiO 3) with 0.7BiFeO 3-0.3BaTiO 3Powder and BiY 2Fe 5O 12Powder mixes, and wherein x is BiY 2Fe 5O 12Mass percent, and x=0.1;
4) the PVA tackiness agent that adds mixed powder quality 9% in mixed powder obtains the mixed powder of required matrix material;
It is 5% polyvinyl alcohol water solution granulation after 60 orders and 120 eye mesh screens sieve makes that described PVA tackiness agent adopts mass concentration;
5) with the mixed powder compression moulding on demand of matrix material,, be incubated 4 hours and get rid of tackiness agent PVA, became porcelain in 1 hour, obtain the ferrous acid bismuth barium titanate sosoloid matrix material of high magnetic intensity and polarizability at 1050 ℃ of following sintering at 550 ℃.
As seen from Figure 7 this moment matrix material remnant polarization be 17.4 microcoulombs/centimetre 2
Embodiment 6:
1) by the chemical general formula BiY that mixes bismuth ferrous acid yttrium 2Fe 5O 12, take by weighing analytically pure Bi 2O 3, Y 2O 3, and Fe 2O 3Preparation back ball milling 4 hours, oven dry is sieved then, and briquetting through 900 ℃ of pre-burnings 3 hours, was pulverized 120 mesh sieves with the gained bulk sample then and was obtained BiY 2Fe 5O 12Powder;
2) press the chemical general formula 0.7BiFeO of ferrous acid bismuth barium titanate sosoloid 3-0.3BaTiO 3, take by weighing analytically pure BaCO 3, TiO 2, Bi 2O 3And Fe 2O 3Preparation back ball milling 4 hours, oven dry is sieved then, and briquetting through 840 ℃ of pre-burnings 3 hours, is crossed 120 mesh sieves after then the gained bulk sample being pulverized and is obtained 0.7BiFeO 3-0.3BaTiO 3Powder;
3) press chemical general formula xBiY 2Fe 5O 12/ (1-x) (0.7BiFeO 3-0.3BaTiO 3) with 0.7BiFeO 3-0.3BaTiO 3Powder and BiY 2Fe 5O 12Powder mixes, and wherein x is BiY 2Fe 5O 12Mass percent, and x=0.2;
4) the PVA tackiness agent that adds mixed powder quality 13% in mixed powder obtains the mixed powder of required matrix material;
It is 5% polyvinyl alcohol water solution granulation after 60 orders and 120 eye mesh screens sieve makes that described PVA tackiness agent adopts mass concentration;
5) with the mixed powder compression moulding on demand of matrix material,, be incubated 4 hours and get rid of tackiness agent PVA, became porcelain in 2 hours, obtain the ferrous acid bismuth barium titanate sosoloid matrix material of high magnetic intensity and polarizability at 1000 ℃ of following sintering at 550 ℃.
As seen from Figure 8 this moment matrix material remnant polarization be 14.8 microcoulombs/centimetre 2
Embodiment 7:
1) by the chemical general formula BiY that mixes bismuth ferrous acid yttrium 2Fe 5O 12, take by weighing analytically pure Bi 2O 3, Y 2O 3, and Fe 2O 3Preparation back ball milling 4 hours, oven dry is sieved then, and briquetting through 900 ℃ of pre-burnings 3 hours, was pulverized 120 mesh sieves with the gained bulk sample then and was obtained BiY 2Fe 5O 12Powder;
2) press the chemical general formula 0.7BiFeO of ferrous acid bismuth barium titanate sosoloid 3-0.3BaTiO 3, take by weighing analytically pure BaCO 3, TiO 2, Bi 2O 3And Fe 2O 3Preparation back ball milling 4 hours, oven dry is sieved then, and briquetting through 840 ℃ of pre-burnings 3 hours, is crossed 120 mesh sieves after then the gained bulk sample being pulverized and is obtained 0.7BiFeO 3-0.3BaTiO 3Powder;
3) press chemical general formula xBiY 2Fe 5O 12/ (1-x) (0.7BiFeO 3-0.3BaTiO 3) with 0.7BiFeO 3-0.3BaTiO 3Powder and BiY 2Fe 5O 12Powder mixes, and wherein x is BiY 2Fe 5O 12Mass percent, and x=0.08;
4) the PVA tackiness agent that adds mixed powder quality 11% in mixed powder obtains the mixed powder of required matrix material;
It is 5% polyvinyl alcohol water solution granulation after 60 orders and 120 eye mesh screens sieve makes that described PVA tackiness agent adopts mass concentration;
5) with the mixed powder compression moulding on demand of matrix material,, be incubated 4 hours and get rid of tackiness agent PVA, became porcelain in 0.5 hour, obtain ferrous acid bismuth barium titanate sosoloid matrix material at 1030 ℃ of following sintering at 550 ℃.
Embodiment 8:
1) by the chemical general formula BiY that mixes bismuth ferrous acid yttrium 2Fe 5O 12, take by weighing analytically pure Bi 2O 3, Y 2O 3, and Fe 2O 3Preparation back ball milling 4 hours, oven dry is sieved then, and briquetting through 900 ℃ of pre-burnings 3 hours, was pulverized 120 mesh sieves with the gained bulk sample then and was obtained BiY 2Fe 5O 12Powder;
2) press the chemical general formula 0.7BiFeO of ferrous acid bismuth barium titanate sosoloid 3-0.3BaTiO 3, take by weighing analytically pure BaCO 3, TiO 2, Bi 2O 3And Fe 2O 3Preparation back ball milling 4 hours, oven dry is sieved then, and briquetting through 840 ℃ of pre-burnings 3 hours, is crossed 120 mesh sieves after then the gained bulk sample being pulverized and is obtained 0.7BiFeO 3-0.3BaTiO 3Powder;
3) press chemical general formula xBiY 2Fe 5O 12/ (1-x) (0.7BiFeO 3-0.3BaTiO 3) with 0.7BiFeO 3-0.3BaTiO 3Powder and BiY 2Fe 5O 12Powder mixes, and wherein x is BiY 2Fe 5O 12Mass percent, and x=0.15;
4) the PVA tackiness agent that adds mixed powder quality 14% in mixed powder obtains the mixed powder of required matrix material;
It is 5% polyvinyl alcohol water solution granulation after 60 orders and 120 eye mesh screens sieve makes that described PVA tackiness agent adopts mass concentration;
5) with the mixed powder compression moulding on demand of matrix material,, be incubated 4 hours and get rid of tackiness agent PVA, became porcelain in 1.5 hours, obtain ferrous acid bismuth barium titanate sosoloid matrix material at 1020 ℃ of following sintering at 550 ℃.

Claims (2)

1.一种高磁化强度和极化强度的铁酸铋钛酸钡固溶体复合材料的制备方法，其特征在于包括以下步骤：1. a preparation method of bismuth ferrite barium titanate solid solution composite material of high magnetization and polarization, is characterized in that comprising the following steps: 1)按掺铋铁酸钇的化学通式BiY2Fe5O12，称取分析纯的Bi2O3，Y2O3，和Fe2O3配制后球磨4小时，然后烘干，过筛，压块，经900℃预烧3小时，然后将所得块状样品粉碎过120目筛得到BiY2Fe5O12粉体；1) According to the general chemical formula BiY 2 Fe 5 O 12 of bismuth-doped yttrium ferrite, weigh and prepare analytically pure Bi 2 O 3 , Y 2 O 3 , and Fe 2 O 3 , ball mill for 4 hours, then dry, pass Sieve, briquette, and pre-sinter at 900°C for 3 hours, then crush the resulting block sample through a 120-mesh sieve to obtain BiY 2 Fe 5 O 12 powder; 2)按铁酸铋钛酸钡固溶体的化学通式0.7BiFeO3-0.3BaTiO3，称取分析纯的BaCO3，TiO2，Bi2O3和Fe2O3配制后球磨4小时，然后烘干，过筛，压块，经840℃预烧3小时，然后将所得块状样品粉碎后过120目筛得到0.7BiFeO3-0.3BaTiO3粉体；2) According to the general chemical formula of bismuth ferrite barium titanate solid solution 0.7BiFeO 3 -0.3BaTiO 3 , weigh and prepare analytically pure BaCO 3 , TiO 2 , Bi 2 O 3 and Fe 2 O 3 and ball mill for 4 hours, then bake Dry, sieve, briquette, and pre-calcine at 840°C for 3 hours, then crush the resulting block sample and pass through a 120-mesh sieve to obtain 0.7BiFeO 3 -0.3BaTiO 3 powder; 3)按化学通式xBiY2Fe5O12/(1-x)(0.7BiFeO3-0.3BaTiO3)将0.7BiFeO3-0.3BaTiO3粉体和BiY2Fe5O12粉体混合均匀，其中x为BiY2Fe5O12的质量百分数，且0.05≤x≤0.2；3) Mix 0.7BiFeO 3 -0.3BaTiO 3 powder and BiY 2 Fe 5 O 12 powder evenly according to the general chemical formula xBiY 2 Fe 5 O 12 /(1-x)(0.7BiFeO 3 -0.3BaTiO 3 ), wherein x is the mass percentage of BiY 2 Fe 5 O 12 , and 0.05≤x≤0.2; 4)向混合粉末中加入混合粉末质量8％～15％的PVA粘合剂得到所需复合材料的混合粉末；4) Adding 8% to 15% of the PVA binder of the mixed powder mass to the mixed powder to obtain the mixed powder of the required composite material; 5)将复合材料的混合粉末按需要压制成型，在550℃，保温4个小时排除粘合剂PVA，在1000～1050℃下烧结0.5～2个小时成瓷，得到高磁化强度和极化强度的铁酸铋钛酸钡固溶体复合材料。5) Press the mixed powder of the composite material into shape as required, heat it at 550°C for 4 hours to remove the binder PVA, and sinter at 1000-1050°C for 0.5-2 hours to form porcelain to obtain high magnetization and polarization Bismuth ferrite barium titanate solid solution composite material. 2.根据权利要求1所述的高磁化强度和极化强度的铁酸铋钛酸钡固溶体复合材料的制备方法，其特征在于：所述的PVA粘合剂采用质量浓度为5％的聚乙烯醇水溶液造粒后经60目与120目筛网过筛制成。2. the preparation method of the bismuth ferrite barium titanate solid solution composite material according to claim 1, is characterized in that: described PVA binder adopts the polyethylene that mass concentration is 5% The alcohol aqueous solution is granulated and sieved through 60-mesh and 120-mesh sieves.
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