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Ultralow-dielectric loss high-dielectric constant ceramic dielectric material and preparation method thereof

A technology of ceramic dielectric materials and high dielectric constant, applied in the field of electronic ceramics, can solve the problems of large dielectric loss, etc., and achieve the effect of reducing dielectric loss, increasing dielectric constant, and rich resource content

Active Publication Date: 2018-11-02
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the present invention provides a ceramic dielectric material with ultra-low dielectric loss and high dielectric constant and its preparation method, which solves the problem of relatively large dielectric loss of ceramic dielectric materials

Method used

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  • Ultralow-dielectric loss high-dielectric constant ceramic dielectric material and preparation method thereof
  • Ultralow-dielectric loss high-dielectric constant ceramic dielectric material and preparation method thereof
  • Ultralow-dielectric loss high-dielectric constant ceramic dielectric material and preparation method thereof

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preparation example Construction

[0026] Its preparation method comprises the following steps:

[0027] (1) According to the chemical formula (Eu 0.5 Nb 0.5 ) 0.01 Ti 0.99 o 2 , Europium oxide, niobium oxide and titanium dioxide were wet ball milled, dried and kept at 1200°C for 2 hours to obtain (Eu 0.5 Nb 0.5 ) 0.01 Ti 0.99 o 2 Ceramic powder.

[0028] (2) will Bi 2 o 3 powder and (Eu0.5 Nb 0.5 ) 0.01 Ti 0.99 o 2 Ceramic powder xwt% Bi according to the chemical formula 2 o 3 -(100-x)wt%(Eu 0.5 Nb 0.5 ) 0.01 Ti 0.99 o 2 For batching, among them, 0<x≤3, after wet ball milling, drying, pre-firing and molding, heat preservation at 1350-1500°C for 2-6h and sinter into porcelain to obtain ultra-low dielectric loss and high dielectric constant ceramic dielectric materials.

[0029] The ball milling medium of the wet ball milling in the step (1) and the step (2) is absolute ethanol, and the ball stone is zirconia ball stone.

[0030] The ball milling time of the wet ball milling in the step (...

specific Embodiment

[0035] (Eu 0.5 Nb 0.5 ) 0.01 Ti 0.99 o 2 The preparation method is as example 1. .

[0036] xwt%Bi 2 o 3 -(100-x)wt%(Eu 0.5 Nb 0.5 ) 0.01 Ti 0.99 o 2 The preparation is as in example 2-8.

example 1

[0038] in Eu 2 o 3 , Nb 2 o 5 and TiO 2 As a raw material, according to the chemical formula (Eu 0.5 Nb 0.5 ) 0.01 Ti 0.99 o 2 Perform batching, wet ball milling for 4 hours, dry at 50°C, pre-calcine at 1200°C for 2 hours, and grind to obtain (Eu 0.5 Nb 0.5 ) 0.01 Ti 0.99 o 2 The ceramic powder is then molded and sintered at 1400°C for 2 hours (Eu 0.5 Nb 0.5 ) 0.01 Ti 0.99 o 2 Ceramic, tested by silver.

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Abstract

The invention provides a (Eu0.5Nb0.5)0.01Ti0.99O2 ultralow-dielectric loss high-dielectric constant ceramic dielectric material added with Bi2O3 and a preparation method thereof. The stoichiometric equation is xwt%Bi2O3-(100-x)wt%(Eu0.5Nb0.5)0.01Ti0.99O2, wherein x is more than 0 and less than or equal to 3. The preparation method comprises the following steps: batching according to the chemical composition, mixing, drying, screening, pre-sintering, performing secondary wet milling, cold isostatic pressing, sintering into ceramics, silver firing and performing other processes, so as to obtainthe ultralow-dielectric loss high-dielectric constant ceramic dielectric material. The dielectric material prepared in the invention has the dielectric constant of more than 25000 and minimum dielectric loss of 0.015, and has excellent frequency (20-106Hz) and temperature stability (150 DEG C below zero to 200 DEG C). The dielectric material prepared in the invention has high practicality, and canbe applied to the microelectronic industry, particularly dynamic random access memory and high dielectric ceramic capacitors.

Description

technical field [0001] The invention belongs to the field of electronic ceramics, is applied to electronic components, and relates to an ultra-low dielectric loss high dielectric constant ceramic dielectric material and a preparation method thereof. Background technique [0002] With the rapid development of the microelectronics industry, the requirements for the miniaturization, integration and intelligence of ceramic capacitors are getting higher and higher. Ceramic capacitors are widely used in dynamic random access memory (DRAM) because of their advantages such as wide operating temperature range, long life, and reliable performance. DRAM is the most widely used semiconductor memory in computers. Dielectric materials with high dielectric constant can further enhance the storage density of DRAM, thereby increasing the degree of integration. Codoping TiO using trivalent and pentavalent ions 2 at 20-10 6 Hz frequency and high dielectric constant in the temperature range...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/462C04B35/622
CPCC04B35/462C04B35/622C04B2235/3224C04B2235/3234C04B2235/3251C04B2235/3298
Inventor 王卓陈浩楠念雯雯范家豪王枭颖李银博
Owner SHAANXI UNIV OF SCI & TECH
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