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A kind of compound for preparing ceramic material and its preparation method and ceramic capacitor

A technology of ceramic capacitors and ceramic materials, applied in capacitors, fixed capacitors, multilayer capacitors, etc., can solve the problems of limitation, high residual polarization, low breakdown field strength, etc. The effect of ordering and high energy storage density

Active Publication Date: 2022-02-08
XIAN TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Among the mainstream environment-friendly lead-free ferroelectric material systems currently researched, sodium bismuth titanate-based materials have relatively high Curie temperature and low depolarization temperature, which ensures that energy storage materials and devices have good temperature Stability, and the saturation polarization is high, but the remnant polarization is also high, and the breakdown field strength is not high, which limits the application of this material system in energy storage

Method used

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  • A kind of compound for preparing ceramic material and its preparation method and ceramic capacitor
  • A kind of compound for preparing ceramic material and its preparation method and ceramic capacitor
  • A kind of compound for preparing ceramic material and its preparation method and ceramic capacitor

Examples

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preparation example Construction

[0039] The present invention is a method for preparing the preparation of a ceramic composite material, comprising the steps of:

[0040] The dried powdered Na 2 CO 3 , SrCO 3 , MgO, Nb 2 O 5 , BI 2 O 3 And TiO 2 Stoichiometric ratio formula were weighed, mixed, milled, calcined, and drying.

[0041] To ensure powdered Na 2 CO 3 , SrCO 3 , MgO, Nb 2 O 5 , BI 2 O 3 And TiO 2 Dry, weighing error does not occur, affecting the performance of the ceramic material, prior to taking the said feedstock at 180 ~ 300 ℃ drying process 8h.

[0042] Using ball milling is yttrium-stabilized zirconia balls, in which the composite mass, yttrium-stabilized zirconia balls and the solvent may be 1: 1: 2, preferably, the ethyl alcohol as a solvent, butanone, preferred is ethanol. The use of ethanol as a solvent low cost, little harm to the human body.

[0043] An embodiment of the present invention, the calcining temperature is 850 ~ 900 ℃, burn time of 3h. At 850 ~ 900 ℃ of the complex of the present...

Embodiment 1

[0065] Method for preparing ceramic capacitor, the following steps:

[0066] A) The analytically pure anhydrous Na 2 CO 3 , SrCO 3 , MgO, Nb 2 O 5 , BI 2 O 3 And TiO 2 After drying at 180 ~ 300 ℃ treated 8h, the composite according to the formula: 0.69Bi 0.5 Na 0.5 TiO 3 -0.3Sr 0.7 Bi 0.2 TiO 3 -0.01Bi (Mg 2 / 3 NB 1 / 3 ) O 3 The stoichiometric ratio of the respective Weigh raw materials are mixed to obtain a mixture;

[0067] B) the mixture obtained in step A in absolute ethanol to yttrium-stabilized zirconia balls as milling media planetary 24h, mixture, yttrium-stabilized zirconia balls, ethanol mass ratio 1: 1: 2, after which the mixed abrasive removed 80 drying ℃ for 24h;

[0068] After C) The mixture obtained in Step B in air at 900 deg.] C prefired 3h, grinding, sieving second ball milling, the mixed powder, yttrium-stabilized zirconia balls, ethanol mass ratio 1: 1: 2 slurry removed 80 drying ℃ for 24h;

[0069] D) obtained in Step C prefired baking powder was sieved, added m...

Embodiment 2

[0075] Complex is of the general formula: 0.68Bi 0.5 Na 0.5 TiO 3 -0.3Sr 0.7 Bi 0.2 TiO 3 -0.02Bi (Mg 2 / 3 NB 1 / 3 ) O 3

[0076] Prepared as in Example 1, except that the calcining temperature 850 ℃, the sintering temperature 1200 ℃.

[0077] Properties such as figure 2 , The energy density of 2.5J / cm 3 Energy storage efficiency of 81%.

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Abstract

The invention discloses a composite for preparing ceramic materials, a preparation method thereof and a ceramic capacitor, and relates to the technical field of dielectric energy storage ceramic materials. The general chemical formula of the material is: (1‑x‑y)Bi 0.5 Na 0.5 TiO 3 -ySr 0.7 Bi 0.2 TiO 3 ‑xBi(Mg 2 / 3 Nb 1 / 3 )O 3 , where 0.0≤x≤0.1, 0.1≤y≤0.45; through the traditional solid-state reaction method and tape casting method after drying, batching, ball milling, drying, pre-calcination, secondary ball milling, secondary drying, granulation , Forming, sintering, polishing and covering gold electrodes to make ceramic capacitors and multilayer ceramic capacitors respectively. The invention has simple preparation process, low cost, no pollution and strong adaptability, the ceramic material has high energy storage density and energy storage efficiency, and the processed MLCC multilayer capacitor has extremely high charge and discharge density and short charge and discharge time.

Description

Technical field [0001] The present invention relates to the technical field storage dielectric ceramic material, particularly relates to a sodium bismuth titanate-based ceramic material, and lead-free preparation method having high energy density and high energy efficiency, and the material is processed to a high density and high charge-discharge ceramic capacitor energy storage efficiency. Background technique [0002] With the development of electronics, information and control technology towards miniaturization, high integration direction, and a safe, environmentally friendly, renewable energy power devices, such as electric vehicles, a large grid energy regulators, medical devices and other mobile energy and use of high density energy storage materials development increasingly become a hot research. Currently focused energy storage materials supercapacitor, a lithium ion battery. Due to the limited output power of the lithium ions, the slow charging speed, short life shortcom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/462C04B35/626C04B35/64H01G4/12H01G4/30
CPCC04B35/462C04B35/62675C04B35/64H01G4/1209H01G4/30C04B2235/3201C04B2235/3298C04B2235/3234C04B2235/3213C04B2235/3255C04B2235/3206C04B2235/6562C04B2235/6567
Inventor 纪红芬刘卫国马晗柯番戴中华庞利霞王欣吴春芳
Owner XIAN TECH UNIV
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