A multifunctional lead-free ceramic with high electrostrain, high energy storage density and high stable dielectric properties and its preparation method
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A technology with high energy storage density and electrostrain, applied in the field of piezoelectric, dielectric and energy storage ceramic materials, can solve problems such as difficult to meet, high working temperature, etc., to reduce production costs, high electrostrain, and simplify sintering The effect of craft
Inactive Publication Date: 2016-09-14
GUILIN UNIV OF ELECTRONIC TECH
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While the currently studied BaTiO 3 It is difficult for the base X9R capacitor ceramic dielectric material to meet such a high operating temperature
[0005] So far, there have been no reports on the multifunctional lead-free electronic ceramic materials and their preparation methods with high electrostrain, high energy storage density and high temperature stable dielectric.
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Embodiment 1
[0028] The preparation ingredients are: (1- u - v ) (Bi 0.5 Na 0.5 ) 1-x( Ca 0.65 Mg 0.35 ) x TiO 3 - u BaTiO 3 - v (Li 0.5 SM 0.5 ) Ti 1-y Zr y o 3 + 0.05(0.5CeO 2 -0.4Y 2 o 3 -0.1MnO 2 )
[0029] in x =0.25, y =0.1, u =0.18; v =0.15.
[0030] Preparation:
[0031] To analyze pure Bi 2 o 3 、Na 2 CO 3 , CaCO 3 , MgO, TiO 2 , Li 2 CO3 、Sm 2 o 3 , ZrO 2 , CeO 2 , Y 2 o 3 , MnO 2 , La 2 o 3 、Eu 2 o 3 and Nd 2 o 3 As raw materials, according to the chemical formula (Bi 0.5 Na 0.5 ) 1-x (Ca 0.65 Mg 0.35 ) x TiO 3 with (Li 0.5 SM 0.5 ) Ti 1-y Zr y o 3 Carry out batching, use anhydrous ethanol as medium wet grinding 24 hours, dry.
[0032] After drying, (Bi 0.5 Na 0.5 ) 1-x (Ca 0.65 Mg 0.35 ) x TiO 3 In the crucible, 850 ℃ of insulations synthesized powder for 2 hours; (Li 0.5 SM 0.5 ) Ti 1-y Zr y o 3 Synthesize powder in a crucible at 800°C for 4 hours;
[0033] The synthesized (Bi 0.5 Na 0.5 ) 1-x (Ca...
Embodiment 2
[0042] Composition expression is the same as embodiment 1:
[0043] The composition is: (1- u - v ) (Bi 0.5 Na 0.5 ) 1-x( Ca 0.65 Mg 0.35 ) x TiO 3 - u BaTiO 3 - v (Li 0.5 Nd 0.5 ) Ti 1-y Zr y o 3 +0.05 (0.5CeO 2 -0.4Y 2 o 3 -0.1MnO 2 )
[0044] in x =0.25, y =0.1, u =0.12; v =0.12.
[0045] The preparation method is the same as in Example 1, and the properties are shown in Table 1.
Embodiment 3
[0047] Composition expression is the same as embodiment 1:
[0048] The composition is: (1- u - v ) (Bi 0.5 Na 0.5 ) 1-x( Ca 0.65 Mg 0.35 ) x TiO 3 - u BaTiO 3 - v (Li 0.5 La 0.5 ) Ti 1-y Zr y o 3 + 0.05(0.5CeO 2 -0.4Y 2 o 3 -0.1MnO 2 )
[0049] in x =0.1, y =0.1, u =0.10; v =0.12.
[0050] The preparation method is the same as in Example 1, and the properties are shown in Table 1.
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Abstract
The invention discloses a multi-functional lead-free electronic ceramic material having the high electrostrictive strain, the high energy density, the high-temperature stable dielectric constant and the like and a preparation method thereof. The general formula of components of the material is as follows: (1-u-v)(Bi0.5Na0.5)1-x(Ca0.65Mg0.35)xTiO3-uBaTiO3-v(A0.5Ln0.5)Ti1-yZryO3+0.05(0.5CeO2-0.4Y2O3-0.1MnO2), wherein A is a monovalent metal element and is selected from one or two of Li, Na, K and Ag, and Ln is a trivalent metal element and is selected from one or two of Nd, La, Sm and Eu; x, y, u and v represent mole fractions, the x is larger than or equal to 0.001 and smaller than or equal to 0.3, the y is larger than or equal to 0.001 and smaller than or equal to 0.4, the u is larger than or equal to 0.02 and smaller than or equal to 0.2, and the v is larger than or equal to 0.08 and smaller than or equal to 0.3. Partial components of the material take single-crystal nanoparticle BaTiO3 powder as a raw material, and the material is prepared with an electronic ceramic preparation technology. The preparation technology is simple, stable and suitable for industrial popularization and application. The multi-functional lead-free electronic material comprises environment-friendly ceramic and is high in electrostrictive strain, high in energy density and good in high-temperature dielectric property.
Description
technical field [0001] The invention relates to piezoelectric, dielectric and energy storage ceramic materials, in particular to a multifunctional lead-free ceramic material with high electric strain, high stable dielectric and high energy storage density and a preparation method thereof. Background technique [0002] Electrostrain materials are functional materials that convert electrical energy to mechanical energy. In recent years, with the increasing demand for precision micro-movers, actuators, etc., lead-based electrostrainable ceramics occupy a dominant position in the field of piezoelectric materials due to their excellent performance. [0003] On the other hand, capacitors with high energy storage density are widely used in pulse power supplies, hybrid electric vehicles, new energy power generation and other fields. With the increasing human demand for energy, the development of electronic information control technology towards miniaturization and high integration,...
Claims
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