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Preparation methods for copper calcium titanate based ceramic material and ceramic capacitor with giant dielectric constant

A copper-calcium titanate-based, ceramic capacitor technology is applied in the field of dielectric ceramic materials and giant dielectric ceramic dielectric capacitor technology development, which can solve the problems of complex process, fail to improve the overall performance of CCTO materials, etc. Short laser action time and good compactness

Inactive Publication Date: 2019-05-03
SHANGHAI LANGYAN OPTOELECTRONICS TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these doping studies did not achieve the purpose of improving the overall performance of CCTO materials. Usually, it reduces the dielectric loss while also reducing the dielectric constant, or brings more technological advantages while improving the dielectric properties. complexity problem

Method used

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  • Preparation methods for copper calcium titanate based ceramic material and ceramic capacitor with giant dielectric constant
  • Preparation methods for copper calcium titanate based ceramic material and ceramic capacitor with giant dielectric constant
  • Preparation methods for copper calcium titanate based ceramic material and ceramic capacitor with giant dielectric constant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Copper oxide (CuO), calcium oxide (CaO), titanium oxide (TiO 2 ), copper powder as raw material, according to Cu:CuO:CaO:TiO 2 = 2:1:1:4 ratio (molar ratio), high-energy ball milling with absolute ethanol as the ball milling medium, then drying, grinding evenly, adding PVA binder with a mass fraction of 5% for granulation and compaction , in a muffle furnace at 550°C for debonding, the heating rate is controlled at 1°C / min, the holding time is 10 hours, and the laser sintering is carried out by adjusting the appropriate laser power. The laser wavelength is 980nm, the laser power is 80W, and the spot diameter is 12mm. It is advisable to cover the molded sample, and the sintering time is 5s. Finally, a large dielectric constant CCTO ceramic dielectric material with fine particles and better compactness is obtained, and its dielectric constant can reach 10 4 As mentioned above, the obtained CCTO-based ceramic material is ground and polished to form a specific shape whose...

Embodiment 2

[0039] Copper oxide (CuO), calcium oxide (CaO), titanium oxide (TiO 2 ) as raw material, according to CuO:CaO:TiO 2 =3:1:4 proportioning (molar ratio), carry out high-energy ball milling with absolute ethanol as the ball milling medium, then dry, grind evenly, add the PVA binder that mass fraction is 7% to carry out granulation, compaction, adopt Laser irradiation is used for debonding, the laser power is 10W, the irradiation time is 30min, and then the appropriate laser power is adjusted for laser sintering. The laser wavelength is 980nm, the laser power is 80W, and the spot diameter is 12mm, which is suitable for covering the molded sample , the sintering time is 5s. Finally, a large dielectric constant CCTO ceramic dielectric material with fine particles and better compactness is obtained, and its dielectric constant can reach 10 4 As mentioned above, the obtained CCTO-based ceramic material is ground and polished to form a specific shape whose upper and lower sides are p...

Embodiment 3

[0041] Copper oxide (CuO), calcium oxide (CaO), titanium oxide (TiO 2 ), copper powder as raw material, according to Cu:CuO:CaO:TiO2 = 2:1:1:4 ratio (molar ratio), high-energy ball milling with absolute ethanol as the ball milling medium, then drying, grinding evenly, adding PVA binder with a mass fraction of 8% for granulation and compaction , in a muffle furnace at 550°C for debonding, the heating rate is controlled at 1°C / min, the holding time is 12 hours, and the laser sintering is carried out by adjusting the appropriate laser power. The laser wavelength is 980nm, the laser power is 90W, and the spot diameter is 12mm. It is advisable to cover the molded sample, and the sintering time is 5s. Finally, a large dielectric constant CCTO ceramic dielectric material with fine particles and better compactness is obtained, and its dielectric constant can reach 10 4 As mentioned above, the obtained CCTO-based ceramic material is ground and polished to form a specific shape with th...

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Abstract

The invention provides a preparation method for a copper calcium titanate based ceramic material. The preparation method comprises the following steps: uniformly mixing base materials or a mixture ofthe base materials and a doping material, and carrying out high-energy ball milling so as to obtain a ball-milled material; and adding a binder into the ball-milled material, carrying out granulationand compaction, and carrying out sintering or laser irradiation so as to obtain the copper calcium titanate based ceramic material; wherein the base materials comprise copper oxide, calcium oxide, titanium dioxide and copper powder. The preparation method provided by the invention has the following advantages: laser sintering of a medium material is highly-efficient and energy-saving; a giant-dielectric material CCTO based ceramic material with fine particles and good compactness is finally obtained; meanwhile, the preparation method for a capacitor has low cost, is rapid and highly-efficient,and is applicable to wide-range application of a CCTO giant-dielectric material in high-density memory devices.

Description

technical field [0001] The invention relates to a copper-calcium titanate-based ceramic material and a preparation method thereof for a giant dielectric constant ceramic capacitor, belonging to the technical development field of dielectric ceramic materials and giant dielectric ceramic dielectric capacitors. Background technique [0002] With the demand for miniaturization and high energy storage density devices in modern society, giant dielectric constant materials have become one of the focuses of people's attention. CCTO (copper calcium titanate) is a kind of giant dielectric constant ceramic material, in a wide Dielectric constant up to 10 over frequency range and temperature range 5 Above, with the rapid development of the electronic communication industry and the new energy industry, the research and development of the giant dielectric properties of CCTO has attracted more and more attention, especially in high-density storage devices, which has a broad application pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/46C04B35/622C04B35/64C04B41/88
Inventor 曾和平黄延伟
Owner SHANGHAI LANGYAN OPTOELECTRONICS TECH
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