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Multiphase giant dielectric ceramic material and preparation method thereof

A ceramic material and giant dielectric technology, which is applied in the field of complex-phase giant dielectric ceramic materials and their preparation, can solve the problems of high dielectric loss, large dielectric constant, etc., and achieves good frequency and temperature stability, high resistance to high voltage Breakdown ability, effect of high insulation resistivity

Active Publication Date: 2020-07-14
GUANGDONG FENGHUA ADVANCED TECH HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Numerous studies have shown that ferroelectric materials such as BaTiO 3 , to meet the requirements of high dielectric constant, but its dielectric constant varies greatly with temperature; other non-ferroelectric materials, such as CaCuTi 3 o 12 (CCTO)﹑doped with NiO and La 2x Sr x NiO 4 (x=1 / 3, 1 / 8), etc., the dielectric constant can reach 10 in a wide temperature range 5 above, but with high dielectric loss (>0.1)

Method used

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  • Multiphase giant dielectric ceramic material and preparation method thereof
  • Multiphase giant dielectric ceramic material and preparation method thereof
  • Multiphase giant dielectric ceramic material and preparation method thereof

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Embodiment 1

[0034]An embodiment of the complex phase giant dielectric ceramic material of the present invention, the total composition expression of the complex phase giant dielectric ceramic material described in this embodiment is A x B nx Ti 1-(n+1)x o 2 , wherein A is Nb, B is In, x=0.0125, n=2.

[0035] The preparation method of the complex phase giant dielectric ceramic material described in this embodiment is as follows:

[0036] (1) Weigh 0.2492g Nb 2 o 5 ﹑0.5206g In 2 o 3 and 11.5312g TiO 2 ;

[0037] (2) Place the above-mentioned reactants in a ball milling tank, use ethanol or acetone as a dispersant, and yttrium-stabilized zirconia balls as a ball milling medium, mill for more than 12 hours, and mix evenly; after drying, a uniform mixture powder is obtained;

[0038] (3) The mixture powder obtained in step (2) is granulated, and the specific granulation process is as follows: the mixed powder is placed in a mortar, and the pure water accounting for 5% of the weight of...

Embodiment 2

[0042] An embodiment of the complex phase giant dielectric ceramic material of the present invention, the total composition expression of the complex phase giant dielectric ceramic material described in this embodiment is A x B nx Ti 1-(n+1)x o 2 , wherein A is Nb, B is In, x=0.075, n=2.

[0043] The preparation method of the complex phase giant dielectric ceramic material described in this embodiment is as follows:

[0044] (1) Weigh 1.4952g Nb 2 o 5 ﹑3.1233g In 2 o 3 and 9.2849 g TiO 2 ;

[0045] (2) Place the above-mentioned reactants in a ball milling tank, use ethanol or acetone as a dispersant, and yttrium-stabilized zirconia balls as a ball milling medium, mill for more than 12 hours, and mix evenly; after drying, a uniform mixture powder is obtained;

[0046] (3) The mixture powder obtained in step (2) is granulated, and the specific granulation process is as follows: the mixed powder is placed in a mortar, and pure water accounting for 10% of the weight of th...

Embodiment 3

[0050] An embodiment of the complex phase giant dielectric ceramic material of the present invention, the total composition expression of the complex phase giant dielectric ceramic material described in this embodiment is A x B nx Ti 1-(n+1)x o 2 , wherein A is Nb, B is In, x=0.0125, n=3.

[0051] The preparation method of the complex phase giant dielectric ceramic material described in this embodiment is as follows:

[0052] (1) Weigh 0.2492g Nb 2 o 5 ﹑0.7809g In 2 o 3 and 11.3809 g TiO 2 ;

[0053] (2) Place the above-mentioned reactants in a ball milling tank, use ethanol or acetone as a dispersant, and yttrium-stabilized zirconia balls as a ball milling medium, mill for more than 12 hours, and mix evenly; after drying, a uniform mixture powder is obtained;

[0054] (3) The mixture powder obtained in step (2) is granulated, and the specific granulation process is as follows: the mixed powder is placed in a mortar, and the pure water accounting for 5% of the weight ...

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Abstract

The invention discloses a multiphase giant dielectric ceramic material. The total component expression of the multiphase giant dielectric ceramic material is AxBnxTi(1-(n+1)xO2, wherein A is selectedfrom at least one of Nb, Ta, V, Mo and Sb, and B is selected from at least one of In, Ga, Al, Co, Cr, Sc, Fe (III) and trivalent rare earth cations; n is the molar ratio of B to A, n is greater than 1and less than or equal to 5, and x is greater than 0 and less than or equal to 0.1. The multiphase giant dielectric ceramic material prepared by the invention has excellent performances of giant dielectric, low loss and good frequency and temperature stability, has high insulation resistivity and high-voltage breakdown resistance, has insulation resistivity higher than 1011 [ohm]cm, and can be applied to high-energy storage devices and supercapacitors. The invention also discloses a preparation method of the multiphase giant dielectric ceramic material.

Description

technical field [0001] The invention relates to a complex-phase giant dielectric ceramic material and a preparation method thereof. Background technique [0002] Research on high-energy storage devices, supercapacitors, and equipment miniaturization shows that, as an indispensable dielectric material, it needs to have giant dielectric, low loss, excellent temperature and frequency stability, and excellent high-voltage breakdown resistance. The energy storage capacity of the device is proportional to the square of the working voltage of the dielectric material used, which shows that it is necessary to study the breakdown resistance of dielectric ceramic materials. [0003] Numerous studies have shown that ferroelectric materials such as BaTiO 3 , to meet the requirements of high dielectric constant, but its dielectric constant varies greatly with temperature; other non-ferroelectric materials, such as CaCuTi 3 o 12 (CCTO)﹑doped with NiO and La 2x Sr x NiO 4 (x=1 / 3, 1 / 8)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/462C04B35/50
CPCC04B35/462C04B35/50C04B2235/96C04B2235/6562C04B2235/6567C04B2235/662C04B2235/3251C04B2235/3239C04B2235/3256C04B2235/3294C04B2235/3286C04B2235/3217C04B2235/3241C04B2235/3272C04B2235/3224C04B2235/449C04B2235/443C04B2235/448C04B2235/442C04B35/6261H01B3/12C04B35/46C04B2235/3409C04B2235/3284C04B2235/3275C04B2235/80C04B35/6263C04B35/645C04B35/6325C04B35/622C04B35/6264C04B35/62655C04B35/62695C04B35/64C04B2235/3234C04B2235/6021C04B2235/604C04B2235/606C04B2235/612C04B2235/762
Inventor 曹秀华刘建梅陈德宏任海东刘芸特里·詹姆士·弗朗科姆付振晓沓世我
Owner GUANGDONG FENGHUA ADVANCED TECH HLDG
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