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Ion modified titanium dioxide ceramic material with high dielectric constant and preparation method thereof

A technology of high dielectric constant and ceramic materials, applied in the field of ceramic materials, high dielectric constant ion-modified titanium dioxide ceramic materials and their preparation, can solve problems such as high dielectric loss, achieve a wide range of operating temperature, increase the possibility of performance and performance optimization

Active Publication Date: 2015-04-01
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to its relatively high dielectric loss, it needs to be further improved

Method used

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  • Ion modified titanium dioxide ceramic material with high dielectric constant and preparation method thereof
  • Ion modified titanium dioxide ceramic material with high dielectric constant and preparation method thereof
  • Ion modified titanium dioxide ceramic material with high dielectric constant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] According to the general formula (A 0.5 Nb 0.5 ) x Ti 1-x o 2 The indicated ion-modified titanium dioxide ceramic component content is used for batching;

[0037] When x=0.005, A=Bi,

[0038] Its formula one is: (Bi 0.5 Nb 0.5 ) 0.005 Ti 0.995 o 2 ,

[0039] When x=0.010, A=Bi,

[0040] Its formula two is: (Bi 0.5 Nb 0.5 ) 0.01 Ti 0.99 o 2 ,

[0041] When x=0.025, A=Bi,

[0042] Its formula three is: (Bi 0.5 Nb 0.5 ) 0.025 Ti 0.975 o 2 ,

[0043] When x=0.035, A=Bi,

[0044] Its formula four is: (Bi 0.5 Nb 0.5 ) 0.035 Ti 0.965 o 2 ,

[0045] When x=0.050, A=Bi,

[0046] Its formula five is: (Bi 0.5 Nb 0.5 ) 0.05 Ti 0.95 o 2 ,

[0047] When x=0.100, A=Bi,

[0048] Its formula six is: (Bi 0.5 Nb 0.5 ) 0.1 Ti 0.9 o 2 ,

[0049] When x=0.150, A=Bi,

[0050] Its formula seven is: (Bi 0.5 Nb 0.5 ) 0.15 Ti 0.85 o 2 .

[0051] Preparation of formula 1: with analytically pure Bi 2 o 3 , Nb 2 o 5 and TiO 2 As raw materials, ...

Embodiment 2

[0059] According to the general formula (A 0.5 Nb 0.5 ) x Ti 1-x o 2 The indicated ion-modified titanium dioxide ceramic component content is used for batching;

[0060] When x=0.005, A=Ga,

[0061] Its formula one is: (Ga 0.5 Nb 0.5 ) 0.005 Ti 0.995 o 2 ,

[0062] When x=0.100, A=Ga,

[0063] Its formula two is: (Ga 0.5 Nb 0.5 ) 0.1 Ti 0.9 o 2 ,

[0064] When x=0.150, A=Ga,

[0065] Its formula three is: (Ga 0.5 Nb 0.5 ) 0.15 Ti 0.85 o 2 .

[0066] Preparation of formula 1: with analytically pure Ga 2 o 3 , Nb 2 o 5 and TiO 2As raw materials, each raw material is accurately weighed according to the stoichiometric ratio, and the weighed raw materials are ball milled with absolute ethanol as a ball milling medium, and dried after ball milling for 24 hours to obtain a mixed dry powder; the obtained dry powder is pre-calcined at 1100 ° C for 4 hours, Then add the polyvinyl alcohol aqueous solution granulation that concentration is 8wt% in the pre-fire...

Embodiment 3

[0073] According to the general formula (A 0.5 Nb 0.5 ) x Ti 1-x o 2 The indicated ion-modified titanium dioxide ceramic component content is used for batching;

[0074] When x=0.005, A=Al,

[0075] Its formula one is: (Al 0.5 Nb 0.5 ) 0.005 Ti 0.995 o 2 ,

[0076] When x=0.100, A=Al,

[0077] Its formula two is: (Al 0.5 Nb 0.5 ) 0.1 Ti 0.9 o 2 ,

[0078] When x=0.150, A=Al,

[0079] Its formula three is: (Al 0.5 Nb 0.5 ) 0.15 Ti 0.85 o 2 .

[0080] Preparation of formula 1: with analytically pure Al 2 o 3 , Nb 2 o 5 and TiO 2 As raw materials, each raw material is accurately weighed according to the stoichiometric ratio, and the weighed raw materials are ball milled with absolute ethanol as a ball milling medium, and dried after ball milling for 24 hours to obtain a mixed dry powder; the obtained dry powder is pre-calcined at 1100 ° C for 4 hours, Then add the polyvinyl alcohol aqueous solution granulation that concentration is 8wt% in the pre-fir...

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Abstract

The invention relates to an ion modified titanium dioxide ceramic material with a high dielectric constant and a preparation method thereof, and belongs to the field of environment-friendly dielectric ceramics. The ceramic material disclosed by the invention is as shown in a general formula as follows: (A0.5Nb0.5)xTi(1-x)O2, wherein A is Bi, Al, Ga, Y, Sc, Yb, Dy, Sm, Gd and Pr, and x is not smaller than 0.005 mol content and not larger than 0.150 mol content. The ceramic material is prepared by adopting a traditional solid phase sintering process; the raw materials in the general formula are added with different trivalent A elements and the same pentavalent Nb element; the obtained ceramic material is as high as 10<6> in dielectric constant and as low as 6% in dielectric loss. The ceramic prepared by the method disclosed by the invention has a relatively large practical value in the present age when electronic elements are miniaturized and lightened, and especially the elements prepared from the ceramic have practical application values in various electronic elements such as capacitors and dynamic storage.

Description

technical field [0001] The invention relates to a class of ceramic materials, in particular to an ion-modified titanium dioxide ceramic material with high dielectric constant and a preparation method thereof, belonging to the field of environment-friendly dielectric ceramics. Background technique [0002] In the past thirty years, the microelectronics industry based on the semiconductor industry has made great progress, and the microelectronics industry has become an important pillar of the national economy of various countries. The miniaturization, integration, and high density of devices have become important factors to promote the development of the microelectronics industry, and high dielectric constant materials are also playing an increasingly important role in microelectronic devices. [0003] The so-called high dielectric constant material refers to a general term for dielectric materials with a dielectric constant (ε) greater than that of silicon dioxide (ε=3.9). M...

Claims

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Application Information

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IPC IPC(8): C04B35/462C04B35/622
Inventor 吴家刚程晓静李振伟肖定全朱建国
Owner SICHUAN UNIV
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