A kind of anti-reduction low-temperature sintering high-frequency heat-stable dielectric ceramic and its preparation method

A low-temperature sintering technology for dielectric ceramics, applied in the field of dielectric ceramics, can solve problems such as poor repeatability, and achieve the effects of promoting the sintering process, low price, and reducing concentration

Active Publication Date: 2015-08-26
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the method is less reproducible

Method used

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  • A kind of anti-reduction low-temperature sintering high-frequency heat-stable dielectric ceramic and its preparation method
  • A kind of anti-reduction low-temperature sintering high-frequency heat-stable dielectric ceramic and its preparation method
  • A kind of anti-reduction low-temperature sintering high-frequency heat-stable dielectric ceramic and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The anti-reduction low-temperature sintering high-frequency heat-stable dielectric ceramic of this embodiment includes the following steps:

[0029] (1) Synthesis of the main crystal phase: SrCO 3 , CaCO 3 , ZrO 2 、TiO 2 As a raw material, press (Sr 0.55 Ca 0.45 )(Zr 0.96 Ti 0.04 )O 3The stoichiometric ratio ingredients were mixed, planetary ball milled for 90min (with deionized water as solvent, and the speed was 300 rpm), dried and ball milled through an 80-mesh sieve, placed in a corundum crucible and pre-sintered at 1150°C in air for 4h. Planetary ball mill 90min (with deionized water as solvent, rotating speed is 300 rev / min), ball mill after drying and pass through 80 mesh sieves, obtain (Sr 0.55 Ca 0.45 )(Zr 0.96 Ti 0.04 )O 3 .

[0030] (2) Preparation of BaO-B by melt quenching method 2 o 3 -SiO 2 (30:60:10) Glass powder: with BaCO 3 、H 3 BO 3 , SiO 2 The raw materials are prepared according to the molar ratio and mixed evenly, placed in a qu...

Embodiment 2

[0040] The anti-reduction low-temperature sintering high-frequency heat-stable dielectric ceramic of this embodiment includes the following steps:

[0041] (1) Synthesis of the main crystal phase: SrCO 3 , CaCO 3 , ZrO 2 、TiO 2 As a raw material, press (Sr 0.55 Ca 0.45 )(Zr 0.96 Ti 0.04 )O 3 The stoichiometric ratio ingredients were mixed, planetary ball milled for 90min (using deionized water as solvent, the speed was 300 rpm), dried and ball milled through an 80 mesh sieve, placed in a corundum crucible and pre-sintered at 1100°C in air for 4.5h. Through planetary ball milling for 90min (with deionized water as solvent, the rotating speed is 300 rpm), after drying, ball milling is passed through 80 mesh sieves to obtain (Sr 0.55 Ca 0.45 )(Zr 0.96 Ti 0.04 )O 3 .

[0042] (2) Preparation of BaO-B by melt quenching method 2 o 3 -SiO 2 (30:60:10) Glass powder: with BaCO 3 、H 3 BO 3 , SiO 2 The raw materials are prepared according to the molar ratio and mixed ...

Embodiment 3

[0047] The anti-reduction low-temperature sintering high-frequency heat-stable dielectric ceramic of this embodiment includes the following steps:

[0048] (1) Synthesis of the main crystal phase: SrCO 3 , CaCO 3 , ZrO 2 、TiO 2 As a raw material, press (Sr 0.55 Ca 0.45 )(Zr 0.96 Ti 0.04 )O 3 The stoichiometric ratio ingredients were mixed, planetary ball milled for 90 minutes (using deionized water as solvent, the speed was 300 rpm), dried and ball milled through an 80-mesh sieve, placed in a corundum crucible and pre-sintered at 1200°C in air for 3.5 hours, Through planetary ball milling for 90min (with deionized water as solvent, the rotating speed is 300 rpm), after drying, ball milling is passed through 80 mesh sieves to obtain (Sr 0.55 Ca 0.45 )(Zr 0.96 Ti 0.04 )O 3 .

[0049] (2) Preparation of BaO-B by melt quenching method 2 o 3 -SiO 2 (30:60:10) Glass powder: with BaCO 3 、H 3 BO 3 , SiO 2 The raw materials are prepared according to the molar ratio ...

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Abstract

The invention discloses an anti-reduction low temperature-sintered high-frequency thermal stability dielectric ceramic. The composition of the dielectric ceramic is represented by (Sr0.55Ca0.45)(Zr0.96Ti0.04)O3 + a BaO-B2O3-SiO2+ b Li2CO3 + c MnCO3, wherein on the basis of the weight percentage of the principal crystalline phase (Sr0.55Ca0.45)(Zr0.96Ti0.04)O3, a is 0.5 to 8%, b is 0 to 1%, and c is 0 to 1%. The anti-reduction low temperature-sintered high-frequency thermal stability dielectric ceramic can be sintered into a compact ceramic at 1000 to 1080 DEG C in an air or reducing atmosphere and has dielectric performance meeting requirements of American EIA standards on MLCC with NP0 temperature characteristics.

Description

technical field [0001] The invention relates to the field of dielectric ceramics, in particular to an anti-reduction low-temperature sintering high-frequency heat-stable dielectric ceramic and a preparation method thereof. Background technique [0002] With the rapid development of electronic communication and technology, the market demand for high-frequency thermally stable multilayer chip ceramic capacitors (MLCC) is increasing, and base metallization of internal electrodes has become a major development direction. Using metal copper (Cu) as the internal electrode can not only reduce the production cost, but also improve the electrical quality factor of the MLCC. But the premise is that the dielectric material for MLCC can be co-fired with Cu in a low-temperature reducing atmosphere. [0003] (Sr,Ca)(Zr,Ti)O 3 Because of its good temperature stability, it is used as a temperature stable (NPO) MLCC dielectric material. Chae-I Cheon et al. (Sr 0.8 Ca 0.2 )(Zr x Ti 1-x...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/49C04B35/622C04B35/63
Inventor 凌志远林道谭
Owner SOUTH CHINA UNIV OF TECH
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