Titanium dioxide-based giant dielectric ceramic material and preparation method thereof

A technology of titanium dioxide and ceramic materials, which is applied in the field of titanium dioxide-based giant dielectric ceramic materials and its preparation, can solve the problems of insufficient comprehensive dielectric properties and restrictions on the development of the electronic material industry, and achieve excellent temperature and frequency stability, large Practical value, effect of improving insulation resistivity

Pending Publication Date: 2021-10-29
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
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Problems solved by technology

[0003] In the past ten years, it has been discovered that CaCu 3 Ti 4 o 12 , Ba(Fe 0.5 m 0.5 )O 3 (M=Nb, Ta, Sb) Li-doped NiO, RFe 2 o 4 (R=Lu, Er) and La 2-x Sr x NiO 4 (x = 1 / 3 and 1 / 8) and a series of novel giant dielectric materials, although the discovery of these new materials has greatly promoted the experimental research and related theoretical development of giant dielectric materials, but the comprehensive dielectric properties of these systems The performance cannot meet the requirements of practical applications (Y. Wang, W. Jie, C. Yang, etal. Adv. Funct. Mater. , 29(27):1808118, 2019)
Usually high dielectric constant is always accompanied by high dielectric loss, this phenomenon greatly limits the development of electronic materials industry

Method used

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  • Titanium dioxide-based giant dielectric ceramic material and preparation method thereof
  • Titanium dioxide-based giant dielectric ceramic material and preparation method thereof
  • Titanium dioxide-based giant dielectric ceramic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) (Tm 0.5 Nb 0.5 ) x (Ti 1-y B y ) 1-x o 2 (x=0.01, y = 0) Processing of raw material powder: thulium oxide (Tm 2 o 3 ), niobium oxide (Nb 2 o 5 ), titanium oxide (TiO 2 ) was dried at 150°C for 5 hours;

[0027] (2) Weighing and batching: Press (Tm 0.5 Nb 0.5 ) 0.01 Ti 0.99 o 2 Stoichiometric ratio Weighing Tm processed in step (1) 2 o 3 (99.999%) 2.3435g, TiO 2 (99.99%)96.0421g, Nb 2 o 5 (99.99%) 1.6144g raw material powder;

[0028] (3) Ball milling and mixing: Add the weighed raw materials into the ball milling tank, use zirconia balls as the balls and absolute ethanol as the ball milling medium, and the mass ratio of raw material mixture to zirconia balls and absolute ethanol is 1:3 : 2, fully ball milled for 24 hours, separated the zirconia balls, put the raw material mixture into a drying oven and dried at 75°C to obtain (Tm 0.5 Nb 0.5 ) 0.01 Ti 0.99 o 2 ceramic powder;

[0029] (4) (Tm 0.5 Nb 0.5 ) 0.01 Ti 0.99 o 2 Synthesis o...

Embodiment 2

[0038] (1) (Tm 0.5 Nb 0.5 ) x (Ti 1-y B y ) 1-x o 2 (x=0.02, y = 0) Processing of raw material powder: thulium oxide (Tm 2 o 3 ), niobium oxide (Nb 2 o 5 ), titanium oxide (TiO 2 ) was dried at 150°C for 5 hours;

[0039] (2) Weighing and batching: Press (Tm 0.5 Nb 0.5 ) 0.02 Ti 0.98 o 2 Stoichiometric ratio Weighing Tm processed in step (1) 2 o 3 9(9.999%) 4.5511g, TiO 2 (99.99%)92.3138g, Nb 2 o 5 (99.99%) 3.1351g raw material powder;

[0040] (3) Ball milling and mixing: Add the weighed raw materials into the ball milling tank, use zirconia balls as the balls and absolute ethanol as the ball milling medium, and the mass ratio of raw material mixture to zirconia balls and absolute ethanol is 1:3 : 2, fully ball milled for 24 hours, separated the zirconia balls, put the raw material mixture into a drying oven and dried at 75°C to obtain (Tm 0.5 Nb 0.5 ) 0.02 Ti 0.98 o 2 ceramic powder;

[0041] (4) (Tm 0.5 Nb 0.5 ) 0.02 Ti 0.98 o 2 Synthesis o...

Embodiment 3

[0049] (1) (Tm 0.5 Nb 0.5 ) x (Ti 1-y B y ) 1-x o 2 (x=0.04, y = 0) Processing of raw material powder: thulium oxide (Tm 2 o 3 ), niobium oxide (Nb 2 o 5 ), titanium oxide (TiO 2 ) was dried at 150°C for 5 hours;

[0050] (2) Weighing and batching: Press (Tm 0.5 Nb 0.5 ) 0.04 Ti 0.96 o 2 Stoichiometric ratio Weighing Tm processed in step (1) 2 o 3 (99.999%) 8.6031g, TiO 2 (99.99%)85.4706g, Nb 2 o 5 (99.99%) 5.9263g raw material powder;

[0051](3) Ball milling and mixing: Add the weighed raw materials into the ball milling tank, use zirconia balls as the balls and absolute ethanol as the ball milling medium, and the mass ratio of raw material mixture to zirconia balls and absolute ethanol is 1:3 : 2, fully ball milled for 24 hours, separated the zirconia balls, put the raw material mixture into a drying oven and dried at 75°C to obtain (Tm 0.5 Nb 0.5 ) 0.04 Ti 0.96 o 2 ceramic powder;

[0052] (4) (Tm 0.5 Nb 0.5 ) 0.04 Ti 0.96 o 2 Synthesis of...

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Abstract

The invention discloses a method for preparing a titanium dioxide-based giant dielectric ceramic material by adopting a solid-phase sintering method. The general formula of the titanium dioxide-based giant dielectric ceramic material is (Tm0.5Nb0.5)x(Ti<1-y>By)<1-x>O2 (x is equal to 0 to 0.1, y is equal to 0 to 0.1), and B represents Zr, Sn, Hf or Ge. The 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 titanium dioxide-based giant dielectric ceramic material within the range of 20 Hz-1 MHz is good, the dielectric constant is 104-105, and the insulation resistivity is 108-1013 [omega]cm. In addition, the material has excellent temperature stability at the temperature ranging from -150 DEG C to 260 DEG C. The titanium dioxide-based giant dielectric ceramic material has practical application value in various electronic devices such as capacitors and dynamic memories.

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] With the miniaturization, integration and intellectualization of ceramic capacitors and microwave dielectric components in the microelectronics technology market, giant dielectric materials with low dielectric loss and high temperature stability are used in multilayer dielectric ceramic capacitors (Multi- LayerCeramic Capacitors, MLCC) research applications are highly anticipated. In order to meet the application requirements of MLCCs, giant dielectric ceramics (>10 3 ) has become an important research direction in the field of materials. [0003] In the past ten years, it has been discovered that CaCu 3 Ti 4 o 12 , Ba(Fe 0.5 m 0.5 )O 3 (M=Nb, Ta, Sb) Li-doped NiO, RFe 2 o 4 (R=Lu, Er) and La 2-x Sr x NiO 4 (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/462C04B35/50C04B35/49C04B35/622C04B41/88
CPCC04B35/462C04B35/50C04B35/49C04B35/622C04B41/88C04B41/009C04B41/5111C04B2235/5436C04B2235/3251C04B2235/3293C04B2235/3287C04B2235/3244C04B2235/96C04B41/4539
Inventor 胡章贵樊江涛贺刚龙震郭帅陈以蒙
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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