CN108689711A - A kind of thermostable type sodium niobate based leadless piezoelectric ceramics and preparation method thereof - Google Patents

A kind of thermostable type sodium niobate based leadless piezoelectric ceramics and preparation method thereof Download PDF

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CN108689711A
CN108689711A CN201810607081.XA CN201810607081A CN108689711A CN 108689711 A CN108689711 A CN 108689711A CN 201810607081 A CN201810607081 A CN 201810607081A CN 108689711 A CN108689711 A CN 108689711A
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oxide
piezoelectric ceramics
sodium niobate
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ceramics
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左如忠
祁核
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Hefei University of Technology
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Abstract

The present invention relates to a kind of thermostable type sodium niobate based leadless piezoelectric ceramics and preparation method thereof, form with general formula (1-z)s &#91;(1-x-y)NaNbO3+xMI+yABO3]+zMIIIt indicates, and:0.08<x<0.15,0<y<0.1,0<z<0.1, MIIFor the oxide of one or more metals, belong to ceramic material field.The technology of preparing of conventional piezoelectric ceramics can be used in the ceramics of the present invention and industrial raw material obtains, sodium niobate based leadless piezoelectric ceramics composition obtained has good piezoelectric property and good temperature stability, and good technology stability, the replacement to parts of traditional lead piezoelectric ceramics can be achieved, there is practicability.

Description

A kind of thermostable type sodium niobate based leadless piezoelectric ceramics and preparation method thereof
Technical field
The present invention relates to a kind of thermostable type sodium niobate based leadless piezoelectric ceramics and preparation method thereof, belong to function ceramics material Material field.
Background technology
Piezoelectric ceramics is a kind of informational function ceramic material that can convert mechanical energy and electric energy mutually, except with piezoelectricity Property outside, also there is dielectricity, elasticity etc., be widely used in medical imaging, sonic transducer, sonic transducer, ultrasonic motor etc.. Prevailing currently on the market is lead zirconate titanate based piezoelectric ceramic materials, this is because it coexists with rhombohedral-tetragonal phase Quasi- homotype phase boundary so that these lead base phase boundary materials have temperature stablize excellent piezoelectric property.However, these materials Use usually all can use a large amount of lead, to bring serious problem of environmental pollution, including China, European Union, Japan etc. to exist Relevant laws and regulations have been put into effect to limit use of the lead in electronic industrial products in interior countries in the world, therefore research and develop performance and be mutually equal to Beautiful alternative lead-free ceramics material is extremely urgent and is worth with great society and economy.
At present most study and to be considered most potential lead-free systems be mainly bismuth-sodium titanate, barium titanate and potassium niobate Sodium-based material.Although each mainstream system room temperature piezoelectric property is having prodigious breakthrough or even the lead zirconate titanate body that can match in excellence or beauty in recent years System, however, there is also this many problems to be solved for the large area industrial applications of leadless piezoelectric ceramics.With most potential tool For the potassium niobate sodium-based leadless piezoelectric ceramic for having high pressure electroresponse and high-curie temperature, grown rapidly in recent years, and The piezoelectric property almost to compare favourably with lead zirconate titanate base ceramics is obtained at room temperature, but can not still realize extensive work at present Industry application.Due to these unleaded essential attributes of the composition with polymorphic phase boundary, potassium-sodium niobate system piezoelectricity and mechanical-electric coupling The problem of performance temperature stability deficiency cannot get always effective solution.In addition, the grain shaped of potassium niobate sodium base leadless ceramics Looks are mostly polygon particle, are different from traditional lead piezoelectric ceramics, to affect the surface quality of thick-film technique and tile. In recent years, there is document report in NaNbO3The middle tetragonal phase and the stabilizer of tripartite's phase of adding respectively can be obtained with P4mm and R3c The lead-free ceramics of the quasi- homotype phase boundary coexisted, and the quasi- homotype phase boundary composition of the system can obtain within the scope of very wide temperature Stable and good piezoelectricity and electromechanical properties.Based on the above reason, by NaNbO3Different tetragonal phases of middle addition and different Tripartite's phase stabiliser, and by adding suitable additive, be expected to further regulate and control structure with performance, be had The quasi- homotype phase boundary of better piezoelectric property is formed to accelerate the practicalization of the system lead-free ceramics.
Invention content
The present invention be by overcome the prior art deficiency, a kind of sodium niobate based leadless piezoelectric ceramics and its preparation side are provided Method.Quasi- homotype phase boundary of the ceramics composition with tripartite's ferroelectric phase and tetragonal ferroelectric phase of the system, and there is good piezoelectricity Performance and temperature-insensitive characteristic.
To achieve the above objectives, the technical solution adopted in the present invention is as follows:
A kind of thermostable type sodium niobate based leadless piezoelectric ceramics, it is characterised in that:The sodium niobate based leadless piezoelectric ceramics It forms expressed by the following formula:
(1-z)[(1-x-y)NaNbO3+xMI+yABO3]+zMII;
X in the general formula, y, z are each element atomic percent shared in material component, 0.08<x<0.15,0<y< 0.1,0<z<0.1;
M in the general formulaISelected from BaTiO3(Bi0.5K0.5)TiO3In one kind or when being selected as two kinds, molar fraction it Be 1;
ABO in the general formula3A be selected from Ba2+,Ca2+,Sr2+,La3+,Bi3+,Na+, at least one of Li+, B is selected from Zr4+,Ti4+,Sn4+,Hf4+,Mg2+,Zn2+,Al3+,Fe3+,Ta5+,Sb5+,W6+At least one of;
ABO in the general formula3Being different from M for one kindIPerovskite compound;
M in the general formulaIIOne kind in oxide selected from Na, Li, Ag, Cu, Fe, La, Mn, Nd, Sm metal is selected from When a variety of, the sum of molar fraction is 1.
A kind of preparation method of thermostable type sodium niobate based leadless piezoelectric ceramics, it is characterised in that specifically include following step Suddenly:
A, raw material is pressed into general formula (1-z)s &#91;(1-x-y)NaNbO3+xMI+yABO3]+zMIIThe stoichiometric ratio of shown chemical composition It carries out weighing chemical pure or analytically pure carbonate or the raw material of metal oxide carries out dispensing;
B, the raw material for preparing step a is using alcohol or water as medium, and through 4-12 hours ball mill mixings, wet-milling obtained after drying To mixed powder;
C, the obtained mixed powders of step b are positioned over to calcine in alumina crucible and are synthesized, synthesis temperature 850-1000oC, Heat preservation 2-4 hours repeats ball mill mixing and calcining, completes precalcining synthesis;
D, the pre-synthesis powder for obtaining step c after grinding still using alcohol or water as medium ball milling 6-12 hours, it is dry Powder afterwards crosses the circle of 10 mm of cold moudling diameter, thickness 0.5-2 mm under the pressure of 50-200 MPa after 100-130 mesh sieve Piece obtains ceramic body;
E, protective atmosphere sintering will be provided using burying powder method under ceramic body that step d is obtained in air normal pressure, be placed in In the double crucibles put upside down, sintering temperature 1100-1350oC, sintering time is 1-4 hours, heating rate 1-3oC/min, Obtain ceramics sample;
F, the ceramics sample that step e is obtained is coated into silver electrode in both ends of the surface after polishing treatment, is subsequently placed in 25-120oC Silicone oil in, make pottery up to the sodium niobate base leadless piezoelectricity within heat-insulation pressure keeping 5-30 minutes under the DC electric field of 2-4 kV/mm Porcelain.
The carbonate or metal oxide starting material can be selected from natrium carbonicum calcinatum, Anhydrous potassium carbonate, Carbon Dioxide lithium, carbon Sour barium, calcium carbonate, strontium carbonate, bismuth oxide, lanthanum sesquioxide, niobium pentaoxide, titanium dioxide, zirconium dioxide, titanium dioxide Tin, hafnium oxide, magnesia, zinc oxide, di-iron trioxide, alundum (Al2O3), antimony oxide, tantalum pentoxide, three oxidations Tungsten, silver oxide, copper oxide, manganese dioxide, neodymium oxide, samarium sesquioxide.
Compared with the prior art, it the features of the present invention and has the beneficial effect that:
1, ceramics composition of the invention is a kind of quasi- ternary series lead-free piezoelectric ceramic of the high tension electricity coefficient with temperature-insensitive, Good stability can be kept in room temperature to piezoelectric property between the Curie temperature of respective ceramics composition, conventional piezoelectric pottery can be used The technology of preparing of porcelain and industrial raw material obtain, and have practicability.
2, a small amount of additive metal oxide can effectively reduce piezoelectric ceramics sintering temperature and obtain finer and close pottery Porcelain, and the piezoelectric property of sodium niobate based leadless piezoelectric ceramics can be improved, the grain morphology of ceramics sample, which has, is similar to traditional lead The spherical shape of base piezoelectric ceramic.
Description of the drawings
Fig. 1 is dielectric-temperature characteristics that sample is formed in embodiment 1.
Fig. 2 is the ferroelectric hysteresis loop that sample is formed in embodiment 1.
Fig. 3 is the bipolar strain curve that sample is formed in embodiment 1.
Fig. 4 is that group becomes in embodiment 2:(1-z)&#91;0.8625NaNbO3+0.1BaTiO3+0.0375SrZrO3&#93;+ zCuO, And when z=0.0025,0.005,0.01,0.015 and 0.02 ceramics sample X ray diffracting spectrum.
Fig. 5 is that group becomes in embodiment 2:(1-z)&#91;0.8625NaNbO3+0.1BaTiO3+0.0375SrZrO3&#93;+ zCuO, Ceramics sample as z=0.005 is 1250oThe stereoscan photograph of natural surface after being sintered 2 hours under C.
Specific implementation mode
Embodiment 1
A, raw material:5.6280g Na2CO3,2.3681g BaCO3,0.4429g SrCO3,13.9550g Nb2O5,0.9585g TiO2,0.3697g ZrO2
B, by the above-mentioned raw material prepared using alcohol as medium, through 6 hours ball mill mixings;Wet-milling obtains mixed powder after drying Material;
C, obtained mixed powder is positioned over to calcine in alumina crucible and is synthesized, synthesis temperature 900oC keeps the temperature 4 hours; It repeats ball mill mixing and calcine technology is primary, complete precalcining synthesis;
D, by obtained pre-synthesis powder after grinding still using alcohol as medium ball milling 12 hours, it is dry after powder cross 100 Mesh sieve after under the pressure of 100 MPa 10 mm of cold moudling diameter, 1 mm of thickness disk, obtain ceramic body;
E, protective atmosphere sintering will be provided using burying powder method under obtained ceramic body in air normal pressure, and will be placed in and puts upside down In double crucibles, sintering temperature 1270oC, sintering time is 2 hours, heating rate 3oC/min obtains ceramics sample;
F, obtained ceramics sample is coated into silver electrode in both ends of the surface after polishing treatment, is subsequently placed in 80oIn the silicone oil of C, Heat-insulation pressure keeping 30 minutes under the DC electric field of 4 kV/mm.
Thus 0.995&#91 is obtained;0.875NaNbO3+0.1BaTiO3+0.025SrZrO3]-0.005Na2The sodium niobate base of O without Lead piezoelectric ceramics.Its dielectric-temperature characteristics such as Fig. 1, ferroelectric hysteresis loop such as Fig. 2, bipolar electroluminescent strain curve are as shown in Figure 3.
Measure other physical properties of sample:Curie temperature is 134oC, dielectric constant 1797(1kHz), piezoelectric constant For 223 pC/N, planar electromechanical coupling factor 31%, mechanical quality factor 170.
Embodiment 2
Each step is carried out successively by the above embodiment, wherein using (1-z)s &#91;0.8625NaNbO3+0.1BaTiO3+ 0.0375SrZrO3&#93;+ zCuO is the piezoelectric ceramics of composition, and precalcining temperature is 900oC, the time is 4 hours.Twice calcine after with Absolute ethyl alcohol is ball-milling medium ball milling 24 hours again.Then molding green body is in 1200-1300oSintering 2 is small in the range of C When.The X ray diffracting spectrum that sample is formed when z=0,0.0025,0.005,0.01,0.015 and 0.02 is as shown in Figure 4.
Sample as z=0.005 is 1250oStereoscan photograph such as Fig. 5 institutes of natural surface after being sintered 2 hours under C Show, the pattern of crystal grain is spherical shape.Measure other physical properties of sample:Curie temperature is 83oC, dielectric constant 2800 (1kHz), piezoelectric constant is 270 pC/N, planar electromechanical coupling factor 28%, mechanical quality factor 190.
Embodiment 3
A, raw material:5.5962g Na2CO3,3.0785g BaCO3,13.8753g Nb2O5,0.9585g TiO2,0.4436g ZrO2
B, by the above-mentioned raw material prepared using alcohol as medium, through 6 hours ball mill mixings;Wet-milling obtains mixed powder after drying Material;
C, obtained mixed powder is positioned over to calcine in alumina crucible and is synthesized, synthesis temperature 900oC keeps the temperature 4 hours; It repeats ball mill mixing and calcine technology is primary, complete precalcining synthesis;
D, by obtained pre-synthesis powder after grinding still using alcohol as medium ball milling 12 hours, it is dry after powder cross 100 Mesh sieve after under the pressure of 100 MPa 10 mm of cold moudling diameter, 1 mm of thickness disk, obtain ceramic body;
E, protective atmosphere sintering will be provided using burying powder method under obtained ceramic body in air normal pressure, and will be placed in and puts upside down In double crucibles, sintering temperature 1270oC, sintering time is 2 hours, heating rate 3oC/min obtains ceramics sample;
F, obtained ceramics sample is coated into silver electrode in both ends of the surface after polishing treatment, is subsequently placed in 80oIn the silicone oil of C, Heat-insulation pressure keeping 30 minutes under the DC electric field of 4 kV/mm.
Thus 0.995&#91 is obtained;0.87NaNbO3+0.1BaTiO3+0.03BaZrO3]-0.005Na2The sodium niobate base of O is unleaded Piezoelectric ceramics.Measure the physical property of sample:Curie temperature is 123oC, dielectric constant 2043(1kHz), piezoelectric constant is 250 pC/N, planar electromechanical coupling factor 32%, mechanical quality factor 280.

Claims (3)

1. a kind of thermostable type sodium niobate based leadless piezoelectric ceramics, it is characterised in that:The sodium niobate based leadless piezoelectric ceramics Composition it is expressed by the following formula:
(1-z)[(1-x-y)NaNbO3+xMI+yABO3]+zMII;
X in the general formula, y, z are each element atomic percent shared in material component, 0.08<x<0.15,0<y< 0.1,0<z<0.1;
M in the general formulaISelected from BaTiO3(Bi0.5K0.5)TiO3In one kind or when being selected as two kinds, molar fraction it Be 1;
ABO in the general formula3A be selected from Ba2+,Ca2+,Sr2+,La3+,Bi3+,Na+,Li+At least one of, B is selected from Zr4 +,Ti4+,Sn4+,Hf4+,Mg2+,Zn2+,Al3+,Fe3+,Ta5+,Sb5+,W6+At least one of;
ABO in the general formula3Being different from M for one kindIPerovskite compound;
M in the general formulaIIOne kind in oxide selected from Na, Li, Ag, Cu, Fe, La, Mn, Nd, Sm metal is selected from When a variety of, the sum of molar fraction is 1.
2. a kind of preparation method of thermostable type sodium niobate based leadless piezoelectric ceramics, it is characterised in that specifically include following steps:
A, raw material is pressed into general formula (1-z)s &#91;(1-x-y)NaNbO3+xMI+yABO3]+zMIIThe stoichiometric ratio of shown chemical composition into Row weighs chemical pure or analytically pure carbonate or the raw material of metal oxide carries out dispensing;
B, the raw material for preparing step a is using alcohol or water as medium, and through 4-12 hours ball mill mixings, wet-milling obtained after drying To mixed powder;
C, the obtained mixed powders of step b are positioned over to calcine in alumina crucible and are synthesized, synthesis temperature 850-1000oC is protected It is 2-4 hours warm, ball mill mixing and calcining are repeated, precalcining synthesis is completed;
D, the pre-synthesis powder for obtaining step c after grinding still using alcohol or water as medium ball milling 6-12 hours, it is dry Powder afterwards crosses the circle of cold moudling diameter 10mm, thickness 0.5-2 mm under the pressure of 50-200 MPa after 100-130 mesh sieve Piece obtains ceramic body;
E, protective atmosphere sintering will be provided using burying powder method under ceramic body that step d is obtained in air normal pressure, be placed in In the double crucibles put upside down, sintering temperature 1100-1350oC, sintering time is 1-4 hours, heating rate 1-3oC/min, Obtain ceramics sample;
F, the ceramics sample that step e is obtained is coated into silver electrode in both ends of the surface after polishing treatment, is subsequently placed in 25-120oC Silicone oil in, make pottery up to the sodium niobate base leadless piezoelectricity within heat-insulation pressure keeping 5-30 minutes under the DC electric field of 2-4 kV/mm Porcelain.
3. a kind of thermostable type sodium niobate based leadless piezoelectric ceramics according to claim 1 or 2 and preparation method thereof, special Sign is:The carbonate or metal oxide starting material can be selected from natrium carbonicum calcinatum, Anhydrous potassium carbonate, Carbon Dioxide lithium, carbon Sour barium, calcium carbonate, strontium carbonate, bismuth oxide, lanthanum sesquioxide, niobium pentaoxide, titanium dioxide, zirconium dioxide, titanium dioxide Tin, hafnium oxide, magnesia, zinc oxide, di-iron trioxide, alundum (Al2O3), antimony oxide, tantalum pentoxide, three oxidations Tungsten, silver oxide, copper oxide, manganese dioxide, neodymium oxide, samarium sesquioxide.
CN201810607081.XA 2018-06-13 2018-06-13 A kind of thermostable type sodium niobate based leadless piezoelectric ceramics and preparation method thereof Pending CN108689711A (en)

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CN109206137A (en) * 2018-11-19 2019-01-15 福州大学 A kind of preparation method of potassium-sodium niobate-zinc titanate strontium crystalline ceramics
CN109809815A (en) * 2019-03-18 2019-05-28 中国科学院上海硅酸盐研究所 A kind of unleaded sodium niobate based antiferroelectric ceramics and preparation method thereof with high saturated polarization and low residual polarization
CN110204335A (en) * 2019-07-01 2019-09-06 西安外事学院 Ceramic material and preparation method thereof a kind of while that there is high energy storage density and efficiency
CN110451958A (en) * 2019-07-24 2019-11-15 嘉兴清锋新材料有限公司 A kind of potassium niobate sodium-based leadless piezoelectric ceramic and its manufacture craft and application
CN110498682A (en) * 2019-09-12 2019-11-26 桂林理工大学 A kind of temperature-stable high-temperature ceramic capacitor dielectric material and preparation method thereof
CN110511026A (en) * 2019-07-24 2019-11-29 桂林理工大学 A kind of X8R type ceramic capacitor dielectric material and preparation method thereof
CN110981477A (en) * 2019-12-31 2020-04-10 西安理工大学 Preparation method of neodymium oxide doped silver niobate ceramic
CN111384573A (en) * 2018-12-31 2020-07-07 深圳市大富科技股份有限公司 Dielectric resonator, dielectric filter, communication equipment and method for preparing dielectric block
CN111662051A (en) * 2020-05-13 2020-09-15 河南理工大学 Lead-free cement-based piezoelectric composite material, and preparation method and application thereof
CN111925209A (en) * 2020-08-10 2020-11-13 国网河南省电力公司电力科学研究院 Lead-free sound vibration piezoelectric transduction material and preparation method thereof
CN112266246A (en) * 2020-11-02 2021-01-26 华北理工大学 Method for preparing Ha, Bi and Ca co-doped potassium-sodium niobate leadless piezoelectric ceramic by solid-phase sintering method
CN112500160A (en) * 2019-09-16 2021-03-16 桐乡清锋科技有限公司 Potassium-sodium niobate-based lead-free piezoelectric ceramic for piezoelectric atomization sheet and manufacturing process
CN112876248A (en) * 2021-02-02 2021-06-01 西北工业大学 Preparation method of 1.28% large electrostrictive strain lead-free potassium sodium niobate-based piezoelectric ceramic
CN113213930A (en) * 2021-06-22 2021-08-06 济南大学 Multi-element doped potassium-sodium niobate-based piezoelectric ceramic and preparation method thereof
CN113582681A (en) * 2021-08-26 2021-11-02 四川特锐祥科技股份有限公司 High-dielectric-constant high-dielectric-strength dielectric material and preparation method thereof
CN113956034A (en) * 2021-11-12 2022-01-21 中国电子科技集团公司第四十六研究所 Method for preparing sodium bismuth titanate piezoelectric ceramic by adopting low-granularity powder
CN114149258A (en) * 2021-12-29 2022-03-08 全球能源互联网研究院有限公司 Piezoelectric ceramic with laminated structure and preparation method and application thereof
CN114907123A (en) * 2022-06-17 2022-08-16 陕西科技大学 A-site disubstituted silver niobate-based perovskite antiferroelectric ceramic material and preparation method thereof
CN116063078A (en) * 2023-01-16 2023-05-05 陕西科技大学 Leadless antiferroelectric ceramic with high transition field and preparation method thereof
CN116082034A (en) * 2023-01-09 2023-05-09 国科大杭州高等研究院 Bismuth sodium titanate-based high-entropy ceramic material with high energy storage characteristic, and preparation method and application thereof
CN116102351A (en) * 2022-12-27 2023-05-12 广东华中科技大学工业技术研究院 Preparation and sintering method of potassium-sodium niobate-based piezoelectric ceramic
CN116768624A (en) * 2023-06-28 2023-09-19 上海工程技术大学 Sodium niobate-based phase-change-free dielectric ceramic material, preparation method and application thereof

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CN109206137A (en) * 2018-11-19 2019-01-15 福州大学 A kind of preparation method of potassium-sodium niobate-zinc titanate strontium crystalline ceramics
CN111384573A (en) * 2018-12-31 2020-07-07 深圳市大富科技股份有限公司 Dielectric resonator, dielectric filter, communication equipment and method for preparing dielectric block
CN109809815B (en) * 2019-03-18 2021-10-01 中国科学院上海硅酸盐研究所 Lead-free sodium niobate-based antiferroelectric ceramic with high saturation polarization and low residual polarization and preparation method thereof
CN109809815A (en) * 2019-03-18 2019-05-28 中国科学院上海硅酸盐研究所 A kind of unleaded sodium niobate based antiferroelectric ceramics and preparation method thereof with high saturated polarization and low residual polarization
CN110204335B (en) * 2019-07-01 2021-10-29 西安外事学院 Ceramic material with high energy storage density and efficiency and preparation method thereof
CN110204335A (en) * 2019-07-01 2019-09-06 西安外事学院 Ceramic material and preparation method thereof a kind of while that there is high energy storage density and efficiency
CN110451958A (en) * 2019-07-24 2019-11-15 嘉兴清锋新材料有限公司 A kind of potassium niobate sodium-based leadless piezoelectric ceramic and its manufacture craft and application
CN110511026B (en) * 2019-07-24 2022-01-04 桂林理工大学 X8R type ceramic capacitor dielectric material and preparation method thereof
CN110511026A (en) * 2019-07-24 2019-11-29 桂林理工大学 A kind of X8R type ceramic capacitor dielectric material and preparation method thereof
CN110498682A (en) * 2019-09-12 2019-11-26 桂林理工大学 A kind of temperature-stable high-temperature ceramic capacitor dielectric material and preparation method thereof
CN112500160A (en) * 2019-09-16 2021-03-16 桐乡清锋科技有限公司 Potassium-sodium niobate-based lead-free piezoelectric ceramic for piezoelectric atomization sheet and manufacturing process
CN110981477A (en) * 2019-12-31 2020-04-10 西安理工大学 Preparation method of neodymium oxide doped silver niobate ceramic
CN111662051A (en) * 2020-05-13 2020-09-15 河南理工大学 Lead-free cement-based piezoelectric composite material, and preparation method and application thereof
CN111925209A (en) * 2020-08-10 2020-11-13 国网河南省电力公司电力科学研究院 Lead-free sound vibration piezoelectric transduction material and preparation method thereof
CN112266246A (en) * 2020-11-02 2021-01-26 华北理工大学 Method for preparing Ha, Bi and Ca co-doped potassium-sodium niobate leadless piezoelectric ceramic by solid-phase sintering method
CN112876248A (en) * 2021-02-02 2021-06-01 西北工业大学 Preparation method of 1.28% large electrostrictive strain lead-free potassium sodium niobate-based piezoelectric ceramic
CN113213930A (en) * 2021-06-22 2021-08-06 济南大学 Multi-element doped potassium-sodium niobate-based piezoelectric ceramic and preparation method thereof
CN113582681B (en) * 2021-08-26 2022-11-29 四川特锐祥科技股份有限公司 High-dielectric-constant high-dielectric-strength dielectric material and preparation method thereof
CN113582681A (en) * 2021-08-26 2021-11-02 四川特锐祥科技股份有限公司 High-dielectric-constant high-dielectric-strength dielectric material and preparation method thereof
CN113956034A (en) * 2021-11-12 2022-01-21 中国电子科技集团公司第四十六研究所 Method for preparing sodium bismuth titanate piezoelectric ceramic by adopting low-granularity powder
CN114149258A (en) * 2021-12-29 2022-03-08 全球能源互联网研究院有限公司 Piezoelectric ceramic with laminated structure and preparation method and application thereof
CN114907123A (en) * 2022-06-17 2022-08-16 陕西科技大学 A-site disubstituted silver niobate-based perovskite antiferroelectric ceramic material and preparation method thereof
CN116102351A (en) * 2022-12-27 2023-05-12 广东华中科技大学工业技术研究院 Preparation and sintering method of potassium-sodium niobate-based piezoelectric ceramic
CN116082034A (en) * 2023-01-09 2023-05-09 国科大杭州高等研究院 Bismuth sodium titanate-based high-entropy ceramic material with high energy storage characteristic, and preparation method and application thereof
CN116082034B (en) * 2023-01-09 2023-11-10 国科大杭州高等研究院 Bismuth sodium titanate-based high-entropy ceramic material with high energy storage characteristic, and preparation method and application thereof
CN116063078A (en) * 2023-01-16 2023-05-05 陕西科技大学 Leadless antiferroelectric ceramic with high transition field and preparation method thereof
CN116768624A (en) * 2023-06-28 2023-09-19 上海工程技术大学 Sodium niobate-based phase-change-free dielectric ceramic material, preparation method and application thereof
CN116768624B (en) * 2023-06-28 2024-05-03 上海工程技术大学 Sodium niobate-based phase-change-free dielectric ceramic material, preparation method and application thereof

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