CN105384436A - Titanium-rich barium strontium titanate-based dielectric medium ceramic material and preparation method thereof - Google Patents

Titanium-rich barium strontium titanate-based dielectric medium ceramic material and preparation method thereof Download PDF

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CN105384436A
CN105384436A CN201510763312.2A CN201510763312A CN105384436A CN 105384436 A CN105384436 A CN 105384436A CN 201510763312 A CN201510763312 A CN 201510763312A CN 105384436 A CN105384436 A CN 105384436A
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ceramic material
strontium titanate
barium
based dielectric
dielectric ceramic
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CN105384436B (en
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张晨
王爱成
凌志新
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Suzhou Pant Piezoelectric Tech Co ltd
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Jiangsu University of Science and Technology
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Abstract

The invention discloses a titanium-rich barium strontium titanate-based dielectric medium ceramic material and a preparation method thereof. The ceramic material comprises the following components in percentage by weight: 95.9wt%-98.1wt% of (Ba0.75Sr0.25)Ti1-1.008O3, 0.8wt%-1.2wt% of Sb2O3, 0.1wt%-0.3wt% of ZnO, 0.1wt%-0.3wt% of MnO2, 0.1wt%-0.3wt% of MgO and 0.8wt%-2.0wt% of Nd2O3. In a preparation process, (Ba0.75Sr0.25)Ti1-1.008O3 powder is pre-synthesized, then Sb2O3, ZnO, MnO2, MgO and Nd2O3 are added to prepare a green body, and the product is prepared through rubber-discharging sintering. The preparation method has the advantages that the ceramic material is a perovskite-structured fine-grain single-phase solid solution with high dielectric constant and low dielectric loss and is low in porosity, high in density and good in repeatability.

Description

Barium-strontium titanate-based dielectric ceramic material of a kind of rich titanium-type and preparation method thereof
Technical field
The present invention relates to a kind of ceramic dielectric technical field, particularly relate to barium-strontium titanate-based dielectric ceramic material of a kind of rich titanium-type and preparation method thereof.
Background technology
Strontium-barium titanate (Ba 1-xsr xtiO 3, BST) and be BaTiO 3with SrTiO 3the unlimited solid solution of composition, namely at BaTiO 3in structure, part Ba 2+by Sr 2+replacing, form A position and replace formula sosoloid, it has had BaTiO concurrently 3high dielectric property and SrTiO 3high stability, low-loss feature, can be used as ceramic capacitor dielectric material.At present, also there are problems in BST base low-frequency ceramic capacitor medium, the mutual restriction mainly between the performance index such as specific inductivity, dielectric loss.Application number be 201010100772.4 Chinese patent disclose a kind of ceramic dielectric material and preparation method thereof, its molar percentage consists of BaCO 312.50 ~ 34.50%; SrCO 314.79 ~ 37.49%; TiO 245.29 ~ 49.39%; CeO 20.01 ~ 0.99%; Dy 2o 30.02 ~ 0.89%; MnO 20.01 ~ 0.14%, its dielectric loss is only 0.2% ~ 0.25%, and specific inductivity is 3000 ~ 3500.Application number be 201310019324.5 Chinese patent disclose a kind of high-dielectric and low-loss media ceramic and preparation method thereof, its composition is Ba by mass percentage 0.68-xsr 0.32y xti 1-2xco 2xo 3: 99.2-99.9%, wherein x=0 ~ 0.012; MnO 2: 0.05-0.2%; MgO:0.1-0.4%, its specific inductivity can reach 5296, but dielectric loss higher 0.83% and formula composition be different from this patent.Application number be 201210519989.8 Chinese patent disclose a kind of Ba 1-xsm xnb yti 0.9-yzr 0.1o 3based dielectric stupalith and preparation method thereof, its mass content consists of Ba 1-xsm xnb yti 0.9-yzr 0.1o 399.6%, wherein x=0 ~ 0.01, y=0 ~ 0.016; MnO 2: 0.1-0.3%; MgO:0.1 ~ 0.3%, specific inductivity is 2863, and dielectric loss is 1.10%.
Along with uhligite structure cell A, B position ion ratio in barium strontium titanate dielectric pottery changes the understanding gradually to porcelain microtexture and macroscopic dielectric performance impact, rich titanium-type barium-strontium titanate ceramic starts the concern causing researchist." MaterialsLetters " foreign periodical twists in the Ba disclosing a kind of Ti molar excess per-cent 4% in " CompositionallyinhomogeneousTi-excessbariumstrontiumtita nateceramicswitharobustdielectrictemperaturestability " literary composition for 2014 the 135th 0.75sr 0.25tiO 3pottery, is found by X diffraction analysis, and occur rich titanium phase in its thing phase composite, its room temperature dielectric constant lower than 4000, and does not relate to dielectric loss.
Summary of the invention
Goal of the invention: the first object of the present invention is the barium-strontium titanate-based dielectric ceramic material of the rich titanium-type of thin crystalline substance providing a kind of high-k, low-dielectric loss; The present invention second object is to provide the preparation method of this dielectric ceramic material.
Technical scheme: for realizing above-mentioned technical purpose, the invention provides the barium-strontium titanate-based dielectric ceramic material of a kind of rich titanium-type, comprises the component of following mass percent:
(Ba 0.75sr 0.25) Ti 1+ δo 395.9 ~ 98.1wt%, Sb 2o 30.8 ~ 1.2wt%, ZnO0.1 ~ 0.3wt%, MnO 20.1 ~ 0.3wt%, MgO0.1 ~ 0.3wt%, Nd 2o 30.8 ~ 2.0wt%, wherein δ=0 ~ 0.008.
Wherein, as preferably, the barium-strontium titanate-based dielectric ceramic material of rich titanium-type comprises the component of following mass percent: (Ba 0.75sr 0.25) Ti 1+ δo 395.9 ~ 97.3wt%, Sb 2o 30.8 ~ 1.2wt%, ZnO0.1 ~ 0.3wt%, MnO 20.1 ~ 0.3wt%, MgO0.1 ~ 0.3wt%, Nd 2o 31.6 ~ 2.0wt%, wherein δ=0.002 ~ 0.004.
Further, specifically, the barium-strontium titanate-based dielectric ceramic material of rich titanium-type comprises the component of following mass percent: (Ba 0.75sr 0.25) Ti 1.002o 396.4wt%, Sb 2o 31.0wt%, ZnO0.2wt%, MnO 20.2wt%, MgO0.2wt%, Nd 2o 32.0wt%.
Present invention further proposes the preparation method of the barium-strontium titanate-based dielectric ceramic material of above-mentioned rich titanium-type, comprise the following steps:
(1) according to molecular formula (Ba 0.75sr 0.25) Ti 1 ~ 1.008o 3, with BaCO 3, SrCO 3, TiO 2for amount of substance first batching thing more obtained than 0.75:0.25:1 ~ 1.008 pressed by raw material, by this first batching thing through ball milling, oven dry, calcining, pre-synthesis (Ba 0.75sr 0.25) Ti 1 ~ 1.008o 3powder;
(2) by (Ba that the component ratio described in the barium-strontium titanate-based dielectric ceramic material of above-mentioned rich titanium-type obtains to step (1) 0.75sr 0.25) Ti 1 ~ 1.008o 3sb is added in powder 2o 3, ZnO, MnO 2, MgO and Nd 2o 3obtained second batching thing, by this second batching thing after ball milling, oven dry, granulation, sub-sieve, compression molding obtains base substrate, wherein, Sb 2o 3as grain growth inhibitor.
(3) base substrate step (2) obtained, after binder removal process, then obtains the barium-strontium titanate-based dielectric ceramic material of rich titanium-type at 1300 ~ 1320 DEG C of sintering 1 ~ 4h.
Preferably, ball milling described in step (1) and (2) is that the first batching thing or the second batching thing, abrading-ball and deionized water mixing are carried out wet ball grinding, wherein, the mass ratio of the first batching thing or the second batching thing, abrading-ball and deionized water is 1:5 ~ 7:2.5 ~ 3.5.
Preferably, described in step (1), the temperature of calcining is 1050 ~ 1100 DEG C, and the time of calcining is 2 ~ 6h.
Preferably, the temperature rise rate of the described calcining employing of step (1) 4 ~ 6 DEG C/min.
Preferably, granulation described in step (2) be adopt mass percent concentration be the polyvinyl alcohol water solution of 5 ~ 10wt% as binding agent, described binding agent add 3 ~ 10wt% that quality is the second batching thing.
Preferably, binder removal process described in step (3) first under 200 ~ 250 DEG C of conditions, is incubated 10 ~ 25min, then under 580 ~ 620 DEG C of conditions, is incubated 10 ~ 25min.
Preferably, the temperature rise rate of the described sintering employing of step (3) 4 ~ 6 DEG C/min.
Beneficial effect: compared with prior art, remarkable advantage of the present invention is that the barium-strontium titanate-based dielectric ceramic material of rich titanium-type is perovskite structure single phase solid solution, has the feature of high-k, low-dielectric loss, and by grain growth inhibitor Sb 2o 3effect, this dielectric ceramic material can obtain fine crystalline structure.Meanwhile, the stupalith void content that obtains of preparation method of the present invention is low, density is high, reproducible.
Accompanying drawing explanation
Fig. 1 is the surface microscopic topographic figure of the barium-strontium titanate-based dielectric ceramic material of rich titanium-type prepared by embodiment 1;
Fig. 2 is the surface microscopic topographic figure of the barium-strontium titanate-based dielectric ceramic material of rich titanium-type prepared by embodiment 2;
Fig. 3 is the surface microscopic topographic figure of the barium-strontium titanate-based dielectric ceramic material of rich titanium-type prepared by embodiment 3;
Fig. 4 is the surface microscopic topographic figure of the barium-strontium titanate-based dielectric ceramic material of rich titanium-type prepared by embodiment 4;
Fig. 5 a), 5b), 5c), 5d) be respectively the X ray diffracting spectrum of the barium-strontium titanate-based dielectric ceramic material of rich titanium-type prepared by embodiment 1,2,3,4.
Embodiment
Below in conjunction with specific embodiment, the present invention is further described, and the description of specific embodiment is only example in essence, and following examples are implemented based on technical solution of the present invention.
The invention provides the barium-strontium titanate-based dielectric ceramic material of a kind of rich titanium-type, comprise following component by mass percentage: (Ba 0.75sr 0.25) Ti 1+ δo 395.9 ~ 98.1wt%, Sb 2o 30.8 ~ 1.2wt%, ZnO0.1 ~ 0.3wt%, MnO 20.1 ~ 0.3wt%, MgO0.1 ~ 0.3wt%, Nd 2o 30.8 ~ 2.0wt%, wherein δ=0 ~ 0.008.
The invention provides a kind of method preparing the barium-strontium titanate-based dielectric ceramic material of rich titanium-type, comprise the steps:
(1) according to molecular formula (Ba 0.75sr 0.25) Ti 1 ~ 1.008o 3, weigh starting raw material BaCO according to amount of substance than 0.75:0.25:1 ~ 1.008 3, SrCO 3and TiO 2, obtained first batching thing.This first batching thing and zirconium oxide balls and deionized water are loaded ball grinder in 1:5 ~ 7:2.5 ~ 3.5 in mass ratio, obtained ball milling slurry carry out wet ball grinding 3 ~ 6h with rotating speed 250 ~ 350r/min in ball mill after, ball milling slurry is placed in charging tray, dry at 110 ~ 130 DEG C, and after being placed in crucible compacting, at 1050 ~ 1100 DEG C, calcine 2 ~ 6h, the temperature rise rate controlling calcining is 4 ~ 6 DEG C/min, pre-synthesis (Ba 0.75sr 0.25) Ti 1 ~ 1.008o 3powder.
(2) by the component ratio of the barium-strontium titanate-based dielectric ceramic material of rich titanium-type to pre-synthesis (Ba 0.75sr 0.25) Ti 1 ~ 1.008o 3sb is added in powder 2o 3, ZnO, MnO 2, MgO and Nd 2o 3obtained second batching thing, this second batching thing and zirconium oxide balls and deionized water are loaded ball grinder in 1:5 ~ 7:2.5 ~ 3.5 in mass ratio, carry out wet ball grinding 3 ~ 6h with rotating speed 250 ~ 350r/min in ball mill after, dry under 110 ~ 130 DEG C of conditions, add the polyvinyl alcohol water solution granulation being equivalent to second batch materials amount 3 ~ 10wt%, wherein the mass percent concentration of polyvinyl alcohol water solution is 5 ~ 10wt%, then cross 40 ~ 60 mesh sieves, under 150 ~ 250MPa, compression molding obtains Φ 10mm flake shaped base substrate; Base substrate is placed on zirconia ceramics backing plate, first through 200 ~ 250 DEG C again after 580 ~ 620 DEG C respectively binder removal 10 ~ 25min, then sintering 1 ~ 4h at 1300 ~ 1320 DEG C, the temperature rise rate wherein controlling to sinter is 4 ~ 6 DEG C/min, treats that stove is cooled to room temperature and obtains porcelain.
Embodiment 1
According to molecular formula (Ba 0.75sr 0.25) Ti 1.002o 3, weigh starting raw material BaCO according to amount of substance than 0.75:0.25:1.002 3, SrCO 3, TiO 2be prepared into the first batching thing, this first batching thing and zirconium oxide balls and deionized water are loaded nylon ball grinder according to mass ratio 1:6:3, in planetary ball mill, carry out wet ball grinding 4h with rotating speed 300r/min, gained ball milling slurry is placed in charging tray, dries at 130 DEG C, after oven dry powder is placed in alumina crucible compacting, putting into chamber type electric resistance furnace and controlling temperature rise rate is 5 DEG C/min, calcines 2h after being heated to 1080 DEG C, obtains pre-synthesis (Ba 0.75sr 0.25) Ti 1.002o 3powder.
In stupalith total mass for 100%, to 97.6wt% (Ba 0.75sr 0.25) Ti 1.002o 31.0wt%Sb is added in powder 2o 3, 0.2wt%MgO, 0.2wt%ZnO, 0.2wt%MnO 2and 0.8wt%Nd 2o 3preparation second batching thing, after wet ball grinding 4h, slurry is in 130 DEG C of oven dry, add the polyvinyl alcohol water solution granulation being equivalent to the second batch materials amount 5wt%, wherein the mass percent concentration of polyvinyl alcohol water solution is 5wt%, and after crossing 40 order sub-sieves, under 150MPa, compression molding obtains Φ 10mm flake shaped base substrate.
Be placed in by base substrate on zirconia ceramics backing plate, first at 200 DEG C, be incubated 15min, then carry out binder removal respectively at 600 DEG C of insulation 15min, controlling temperature rise rate is that 5 DEG C/min sinters 2h in 1300 DEG C, is cooled to after room temperature obtains porcelain until stove.The room temperature dielectric constant of the barium-strontium titanate-based dielectric ceramic material of the present invention is 3027 after tested, and dielectric loss is 0.71%, and its X ray diffracting spectrum such as Fig. 5 a) composes, and its surface microscopic topographic figure as shown in Figure 1.In the present embodiment, the barium-strontium titanate-based dielectric ceramic material of rich titanium-type is perovskite structure single phase solid solution, and its median size is less than 1 μm, has fine crystalline structure.
Embodiment 2
Step is substantially the same manner as Example 1, and difference is: (the Ba added 0.75sr 0.25) Ti 1.002o 3for 97.2wt%, Nd 2o 3for 1.2wt%.In the present embodiment, the room temperature dielectric constant of barium-strontium titanate-based dielectric medium porcelain is 3096 after tested, and dielectric loss is 0.45%, and its X ray diffracting spectrum is as Fig. 5 b) shown in, its surface microscopic topographic figure is as shown in Figure 2.In the present embodiment, the barium-strontium titanate-based dielectric ceramic material of rich titanium-type is perovskite structure single phase solid solution, and its median size is less than 1 μm, has fine crystalline structure.
Embodiment 3
Step is substantially the same manner as Example 1, and difference is: (the Ba added 0.75sr 0.25) Ti 1.002o 3for 96.8wt%, Nd 2o 3for 1.6wt%.The room temperature dielectric constant of the barium-strontium titanate-based dielectric ceramic material of the present embodiment is 3175 after tested, and dielectric loss is 0.27%, and its X ray diffracting spectrum is as Fig. 5 c) shown in, its surface microscopic topographic figure is as shown in Figure 3.In the present embodiment, the barium-strontium titanate-based dielectric ceramic material of rich titanium-type is perovskite structure single phase solid solution, and its median size is less than 1 μm, has fine crystalline structure.
Embodiment 4
Step is substantially the same manner as Example 1, and difference is: (the Ba added 0.75sr 0.25) Ti 1.002o 3for 96.4wt%, Nd 2o 3for 2.0wt%.The room temperature dielectric constant of the barium-strontium titanate-based dielectric ceramic material of the present embodiment is 3442 after tested, and dielectric loss is 0.29%, and its X ray diffracting spectrum is as Fig. 5 d) shown in, its surface microscopic topographic figure is as shown in Figure 4.In the present embodiment, the barium-strontium titanate-based dielectric ceramic material of rich titanium-type is perovskite structure single phase solid solution, and its median size is less than 1 μm, has fine crystalline structure.
Embodiment 5
Step is substantially the same manner as Example 1, and difference is: according to molecular formula (Ba 0.75sr 0.25) Ti 1.004o 3starting raw material BaCO is weighed than for 0.75:0.25:1.004 according to amount of substance 3, SrCO 3, TiO 2.The room temperature dielectric constant of the barium-strontium titanate-based dielectric ceramic material of the present embodiment is 3472 after tested, and dielectric loss is 0.69%.
Embodiment 6
Step is substantially the same manner as Example 1, and difference is: according to molecular formula (Ba 0.75sr 0.25) Ti 1.008o 3starting raw material BaCO is weighed than for 0.75:0.25:1.008 by amount of substance 3, SrCO 3, TiO 2.The room temperature dielectric constant of the barium-strontium titanate-based dielectric ceramic material of the present embodiment is 3895 after tested, and dielectric loss is 0.94%.
Embodiment 7
According to molecular formula (Ba 0.75sr 0.25) TiO 3, weigh starting raw material BaCO according to amount of substance than 0.75:0.25:1 3, SrCO 3, TiO 2obtained first batching thing, this first batching thing and zirconium oxide balls and deionized water are loaded nylon ball grinder according to mass ratio 1:5:2.5, in planetary ball mill, carry out wet ball grinding 3h with rotating speed 250r/min, gained ball milling slurry is placed in charging tray, dries at 130 DEG C, after oven dry powder is placed in alumina crucible compacting, putting into chamber type electric resistance furnace and controlling temperature rise rate is 4 DEG C/min, calcines 2h after being heated to 1050 DEG C, obtains pre-synthesis (Ba 0.75sr 0.25) TiO 3powder; In stupalith total mass for 100%, to 98.1wt% (Ba 0.75sr 0.25) TiO 30.8wt%Sb is added in powder 2o 3, 0.1wt%MgO, 0.1wt%ZnO, 0.1wt%MnO 2, 0.8wt%Nd 2o 3obtained second batching thing, after wet ball grinding 6h, slurry is in 110 DEG C of oven dry, add the polyvinyl alcohol water solution granulation being equivalent to the second batch materials amount 10wt%, wherein, the mass percent concentration of polyvinyl alcohol water solution is 5wt%, after crossing 40 order sub-sieves, under 150MPa, compression molding obtains Φ 10mm flake shaped base substrate; Be placed in by base substrate on zirconia ceramics backing plate, elder generation is at 200 DEG C again after 580 DEG C respectively binder removal 10min, and controlling temperature rise rate is that 6 DEG C/min sinters 1h in 1300 DEG C, treats that stove is cooled to room temperature and obtains stupalith.The room temperature dielectric constant of the barium-strontium titanate-based dielectric ceramic material of the present embodiment is 3127 after tested, and dielectric loss is 0.78%.
Embodiment 8
According to molecular formula (Ba 0.75sr 0.25) Ti 1.008o 3, weigh starting raw material BaCO according to amount of substance than 0.75:0.25:1.008 3, SrCO 3, TiO 2, obtained first batching thing.This first batching thing and zirconium oxide balls and deionized water are loaded nylon ball grinder according to mass ratio 1:7:3.5, wet ball grinding 6h is carried out with rotating speed 350r/min in planetary ball mill, gained ball milling slurry is placed in charging tray, dry at 110 DEG C, after oven dry powder is placed in alumina crucible compacting, putting into chamber type electric resistance furnace and controlling temperature rise rate is 6 DEG C/min, at 1100 DEG C of calcining 6h, obtains pre-synthesis (Ba 0.75sr 0.25) Ti 1.008o 3powder; In stupalith total mass for 100%, to 95.9wt% (Ba 0.75sr 0.25) Ti 1.008o 31.2wt%Sb is added in powder 2o 3, 0.3wt%MgO, 0.3wt%ZnO, 0.3wt%MnO 2and 2.0wt%Nd 2o 3obtained second batching thing, ball milling slurry is obtained after wet ball grinding 3h, slurry is in 130 DEG C of oven dry, add the polyvinyl alcohol water solution granulation being equivalent to the second batch materials amount 3wt%, wherein the mass percent concentration of polyvinyl alcohol water solution is 10wt%, and after crossing 60 order sub-sieves, under 250MPa, compression molding obtains Φ 10mm flake shaped base substrate; Be placed in by base substrate on zirconia ceramics backing plate, after first carrying out binder removal 25min respectively through 620 DEG C again through 250 DEG C, controlling temperature rise rate is that 4 DEG C/min sinters 4h in 1320 DEG C, treats that stove is cooled to room temperature and obtains stupalith.The room temperature dielectric constant of the barium-strontium titanate-based dielectric ceramic material of the present embodiment is 3264 after tested, and dielectric loss is 0.55%.
Above embodiment just plays illustrated example effect to technical conceive of the present invention; can not limit the scope of the invention with this; those skilled in the art are not departing from the spirit and scope of technical solution of the present invention; modify and be equal to replacement, all should drop within protection scope of the present invention.

Claims (10)

1. the barium-strontium titanate-based dielectric ceramic material of rich titanium-type, is characterized in that, comprises the component of following mass percent:
(Ba 0.75sr 0.25) Ti 1+ δo 395.9 ~ 98.1wt%, Sb 2o 30.8 ~ 1.2wt%, ZnO0.1 ~ 0.3wt%, MnO 20.1 ~ 0.3wt%, MgO0.1 ~ 0.3wt%, Nd 2o 30.8 ~ 2.0wt%, wherein δ=0 ~ 0.008.
2. the barium-strontium titanate-based dielectric ceramic material of rich titanium-type according to claim 1, is characterized in that, comprise the component of following mass percent:
(Ba 0.75sr 0.25) Ti 1+ δo 395.9 ~ 97.3wt%, Sb 2o 30.8 ~ 1.2wt%, ZnO0.1 ~ 0.3wt%, MnO 20.1 ~ 0.3wt%, MgO0.1 ~ 0.3wt%, Nd 2o 31.6 ~ 2.0wt%, wherein δ=0.002 ~ 0.004.
3. the barium-strontium titanate-based dielectric ceramic material of rich titanium-type according to claim 1 and 2, is characterized in that, comprise the component of following mass percent:
(Ba 0.75Sr 0.25)Ti 1.002O 396.4wt％、Sb 2O 31.0wt％、ZnO0.2wt％、MnO 20.2wt％、MgO0.2wt％，Nd 2O 32.0wt％。
4. a preparation method for the barium-strontium titanate-based dielectric ceramic material of rich titanium-type according to claim 1, is characterized in that, comprise the following steps:
(1) according to molecular formula (Ba 0.75sr 0.25) Ti 1 ~ 1.008o 3, with BaCO 3, SrCO 3, TiO 2for starting raw material presses amount of substance first batching thing more obtained than 0.75:0.25:1 ~ 1.008, by this first batching thing through ball milling, oven dry, calcining, pre-synthesis (Ba 0.75sr 0.25) Ti 1 ~ 1.008o 3powder;
(2) by component ratio according to claim 1 to above-mentioned (Ba 0.75sr 0.25) Ti 1 ~ 1.008o 3sb is added in powder 2o 3, ZnO, MnO 2, MgO and Nd 2o 3obtained second batching thing, by this second batching thing after ball milling, oven dry, granulation, sub-sieve, compression molding obtains base substrate;
(3) base substrate step (2) obtained, after binder removal process, then obtains the barium-strontium titanate-based dielectric ceramic material of rich titanium-type at 1300 ~ 1320 DEG C of sintering 1 ~ 4h.
5. the preparation method of the barium-strontium titanate-based dielectric ceramic material of rich titanium-type according to claim 4, it is characterized in that, ball milling described in step (1) and (2) is that the first batching thing or the second batching thing, abrading-ball and deionized water mixing are carried out wet ball grinding, wherein, the mass ratio of the first batching thing or the second batching thing, abrading-ball and deionized water is 1:5 ~ 7:2.5 ~ 3.5.
6. the preparation method of the barium-strontium titanate-based dielectric ceramic material of rich titanium-type according to claim 4, is characterized in that, described in step (1), the temperature of calcining is 1050 ~ 1100 DEG C, and the time of calcining is 2 ~ 6h.
7. the preparation method of the barium-strontium titanate-based dielectric ceramic material of rich titanium-type according to claim 4 or 6, is characterized in that, the temperature rise rate of the described calcining employing of step (1) 4 ~ 6 DEG C/min.
8. the preparation method of the barium-strontium titanate-based dielectric ceramic material of rich titanium-type according to claim 4, it is characterized in that, granulation described in step (2) be adopt mass percent concentration be the polyvinyl alcohol water solution of 5 ~ 10wt% as binding agent, described binding agent add 3 ~ 10wt% that quality is the second batching thing.
9. the preparation method of the barium-strontium titanate-based dielectric ceramic material of rich titanium-type according to claim 4, it is characterized in that, binder removal process described in step (3) first under 200 ~ 250 DEG C of conditions, is incubated 10 ~ 25min, then be incubated 10 ~ 25min under 580 ~ 620 DEG C of conditions.
10. the preparation method of the barium-strontium titanate-based dielectric ceramic material of rich titanium-type according to claim 4, is characterized in that, the temperature rise rate of the described sintering employing of step (3) 4 ~ 6 DEG C/min.
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CN112341187A (en) * 2020-10-08 2021-02-09 重庆三峡学院 Preparation method of barium titanate piezoelectric material for landslide displacement monitoring in three gorges reservoir area

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