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Complex-phase giant dielectric ceramic material with high breakdown field strength and preparation method thereof

A technology of ceramic materials and composite ceramics, which is applied in the field of titanium dioxide-based giant dielectric ceramic materials and its preparation, and achieves the effects of low price, good repeatability, and excellent dielectric properties

Pending Publication Date: 2021-12-24
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these TiO 2 Base ceramics have a high dielectric constant (ε r > 10 4 ), but the problems of high dielectric loss and low breakdown field strength have not been solved (CN 110803923 A, CN 105906340 A, CN 105732020 A)

Method used

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  • Complex-phase giant dielectric ceramic material with high breakdown field strength and preparation method thereof
  • Complex-phase giant dielectric ceramic material with high breakdown field strength and preparation method thereof
  • Complex-phase giant dielectric ceramic material with high breakdown field strength and preparation method thereof

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Embodiment 1

[0025] A kind of embodiment of complex phase giant dielectric ceramic material of the present invention, the total composition expression of complex phase giant dielectric ceramic material described in the present embodiment is (A 0.5 Ta 0.5 ) x Ti 1-x o 2 +y wt%B (x=0.01,y= 1), A is Ho, B is SiO 2 .

[0026] The preparation method of the complex phase giant dielectric ceramic material described in this embodiment is as follows:

[0027] (1) (Ho 0.5 Ta 0.5 ) 0.01 Ti 0.99 o 2 +1wt%SiO 2Processing of raw material powder: holmium oxide (Ho 2 o 3 ), tantalum oxide (Ta 2 o 5 ), titanium oxide (TiO 2 ), silicon oxide (SiO 2 ) was dried at 150°C for 5 hours;

[0028] (2) Weighing and batching: press (Ho 0.5 Ta 0.5 ) 0.01 Ti 0.99 o 2 Stoichiometric ratio Weighing Ho processed in step (1) 2 o 3 (99.999%) 2.2717g, TiO 2 (99.99%)95.0716 、 Ta 2 o 5 (99.99%) 2.6567g raw material powder;

[0029] (3) Ball milling and mixing: Add the weighed raw materials into th...

Embodiment 2

[0040] A kind of embodiment of complex phase giant dielectric ceramic material of the present invention, the total composition expression of complex phase giant dielectric ceramic material described in the present embodiment is (A 0.5 Ta 0.5 ) x Ti 1-x o 2 +y wt%B (x=0.01,y=3), A is Ho, B is SiO 2 .

[0041] The preparation method of the complex phase giant dielectric ceramic material described in this embodiment is as follows:

[0042] (1) (Ho 0.5 Ta 0.5 ) 0.01 Ti 0.99 o 2 +3wt%SiO 2 Processing of raw material powder: holmium oxide (Ho 2 o 3 ), tantalum oxide (Ta 2 o 5 ), titanium oxide (TiO 2 ), silicon oxide (SiO 2 ) was dried at 150°C for 5 hours;

[0043] (2) Weighing and batching: press (Ho 0.5 Ta 0.5 ) 0.01 Ti 0.99 o 2 Stoichiometric ratio Weighing Ho processed in step (1) 2 o 3 (99.999%) 2.2717g, TiO 2 (99.99%)95.0716 、 Ta 2 o 5 (99.99%) 2.6567g raw material powder;

[0044] (3) Ball milling and mixing: Add the weighed raw materials into th...

Embodiment 3

[0055] A kind of embodiment of complex phase giant dielectric ceramic material of the present invention, the total composition expression of complex phase giant dielectric ceramic material described in the present embodiment is (A 0.5 Ta 0.5 ) x Ti 1-x o 2 +y wt%B (x=0.01,y=5), A is Ho, B is SiO 2 .

[0056] The preparation method of the complex phase giant dielectric ceramic material described in this embodiment is as follows:

[0057] (1) (Ho 0.5 Ta 0.5 ) 0.01 Ti 0.99 o 2 +5wt%SiO 2 Processing of raw material powder: holmium oxide (Ho 2 o 3 ), tantalum oxide (Ta 2 o 5 ), titanium oxide (TiO 2 ), silicon oxide (SiO 2 ) was dried at 150°C for 5 hours;

[0058] (2) Weighing and batching: press (Ho 0.5 Ta 0.5 ) 0.01 Ti 0.99 o 2 Stoichiometric ratio Weighing Ho processed in step (1) 2 o 3 (99.999%) 2.2717g, TiO 2 (99.99%)95.0716 、 Ta 2 o 5 (99.99%) 2.6567g raw material powder;

[0059] (3) Ball milling and mixing: Add the weighed raw materials into th...

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Abstract

The invention relates to a titanium dioxide based giant dielectric ceramic material and a preparation method thereof. The general formula of the titanium dioxide based giant dielectric ceramic material is (A0.5Ta0.5)xTi1-xO2+y wt% B (x=0.01-0.1, y=1-10), A is selected from at least one of Ho, Tm, Gd, Lu, La, Al, Ga and In, and B is selected from at least one of SiO2, Al3O2, Bi3O2, B3O2, ZrO2, SrTiO3 and CaTiO3. The preparation method is a solid-phase sintering method, the method is simple, the repeatability is good, the yield is high, the frequency stability of the obtained giant dielectric ceramic material within the range of 20 Hz-5 MHz is good, the dielectric constant ranges from 103 to 105, and the breakdown field strength reaches up to 322-1985 V / cm. The method has practical application value in various electronic devices such as capacitors, dynamic memories and the like.

Description

technical field [0001] The invention belongs to the technical field of electronic ceramics and its manufacture, and specifically relates to a titania-based giant dielectric ceramic material and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of microelectronics technology, the integration of electronic components and devices makes the design of miniaturized modules essential. Therefore, giant dielectric materials with low dielectric loss and high temperature stability are highly anticipated in the research and application of multi-layer dielectric ceramic capacitors (Multi-layer Ceramic Capacitors, MLCC). In order to meet the application requirements of MLCC, the development of giant dielectric ceramics with low dielectric loss and good temperature / frequency stability has become an important research direction in the field of materials. [0003] In the past ten years, a series of novel giant dielectric materials have b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/46C04B35/622C04B41/88
CPCC04B35/46C04B35/622C04B41/009C04B41/5116C04B41/88C04B2235/3251C04B2235/3224C04B2235/3418C04B2235/5427C04B2235/602C04B2235/656C04B2235/6562C04B2235/6567C04B41/4535C04B41/0072
Inventor 胡章贵樊江涛贺刚陈以蒙龙震郭帅
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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