Grain-graded zirconium oxide toughened aluminum oxide ceramic substrate and preparation process thereof

A technology of alumina ceramics and zirconia, applied in the field of grain-graded zirconia toughened alumina ceramic substrates and its preparation technology, can solve problems such as breakdown of heating elements, reduce sintering temperature, and facilitate industrial production , the effect of saving energy

Active Publication Date: 2020-07-14
SINOCERAM TECH (ZHENGZHOU) CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the ZrO2 content exceeds a certain amount, the ZTA ceramic copper-clad ci

Method used

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  • Grain-graded zirconium oxide toughened aluminum oxide ceramic substrate and preparation process thereof
  • Grain-graded zirconium oxide toughened aluminum oxide ceramic substrate and preparation process thereof
  • Grain-graded zirconium oxide toughened aluminum oxide ceramic substrate and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: A zirconia-doped alumina ceramic substrate, using alumina powder as the main phase material, zirconia powder as the second phase material, magnesia alumina spinel powder as the sintering aid, and absolute ethanol and methyl ethyl ketone The binary azeotropic mixture is used as solvent, phosphate ester is used as dispersant, polyvinyl butyral is used as binder, and dibutyl phthalate is used as plasticizer.

[0030] Specifically, it is prepared with the following raw materials: 3.30% volume percentage of 3Y zirconia powder (particle size 0.25μm), 96.7% volume percentage content of α~alumina powder (particle size 0.7μm), plus 3Y zirconia 0.1% of the total weight of powder and alumina powder as a flux of magnesia-aluminum spinel powder to form an inorganic powder; and add a solvent composed of a binary azeotropic mixture of absolute ethanol and methyl ethyl ketone with 20% of the total weight of inorganic powder , Add 0.5% of the total weight of inorganic powder as ...

Embodiment 2

[0031] Example 2: A zirconia-doped alumina ceramic substrate, which specifically includes the following raw materials, is prepared: 8% by volume of 3Y zirconia powder (particle size 0.25μm), 92% by volume of α ~Alumina powder (particle size 0.7μm), plus 2% magnesia-aluminum spinel powder flux based on the total weight of 3Y zirconia powder and alumina powder to form an inorganic powder; and add 25% of the total weight of inorganic powder Solvent consisting of a binary azeotropic mixture of absolute ethanol and methyl ethyl ketone, adding 1.0% of the total weight of inorganic powder as a dispersant, and ball milling for 32 hours; then adding 8% of the total weight of inorganic powder as a bonding agent The total weight of polyvinyl butyral and inorganic powder 4% of the total weight of dibutyl phthalate as a plasticizer, secondary ball milling for 48 hours; discharged from the ball mill, through vacuum degassing to obtain a viscosity of 22000mPa •S casting slurry; cast on a cast...

Embodiment 3

[0032] Example 3: A zirconia-doped alumina ceramic substrate, which specifically includes the following raw materials, is prepared: 13% by volume of 3Y zirconia powder (particle size 0.25μm), 87% by volume of α ~Alumina powder (particle size 0.7μm), plus 3Y zirconia powder and 3% of the total weight of alumina powder magnesia-aluminum spinel powder flux, together to form an inorganic powder; and adding 30% of the total weight of inorganic powder A solvent consisting of a binary azeotropic mixture of absolute ethanol and methyl ethyl ketone, adding 1.5% of the total weight of inorganic powder as a dispersant, and ball milling for 40 hours; then adding 12% of the total weight of inorganic powder as a bonding agent Polyvinyl butyral and 5% of the total weight of inorganic powder as plasticizer dibutyl phthalate, secondary ball milling for 48 hours; the material is discharged from the ball mill, and the viscosity is 24000mPa through vacuum degassing •S casting slurry; cast on a cas...

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Abstract

The invention relates to a grain-graded zirconium oxide toughened aluminum oxide ceramic substrate and a preparation process thereof. Alumina powder is used as a main phase and zirconia powder is usedas a second phase material; magnesium aluminate spinel powder is used as a sintering aid; taking a binary azeotropic mixture of absolute ethyl alcohol and butanone as a solvent; phosphate esters as dispersants, polyvinyl butyral is used as an adhesive; dibutyl phthalate is used as a plasticizer; the volume ratio of the alumina powder to the zirconia powder is 82.44%-96.7%; the content of the zirconia powder is 3.30%-17.56%; the magnesium aluminate spinel powder accounts for 0.1-4.0% of the total weight of the alumina powder and the zirconia powder; the alumina powder, the zirconia powder andthe magnesium aluminate spinel powder form inorganic powder; the solvent accounts for 20-35% of the total weight of the inorganic powder; a dispersing agent accounts for 0.5-2.0% of the total weight of the inorganic powder, an adhesive accounts for 5-15% of the total weight of the inorganic powder, a plasticizer accounts for 2-6% of the total weight of the inorganic powder, wherein the particle size ratio of alumina powder to zirconia powder is 2.415-4.444, so that ZrO2 can be used as a toughening phase, no leakage current is generated, and the requirements of a ZTA ceramic copper-clad substrate and a heating element on mechanical and electrical properties can be met.

Description

Technical field [0001] The invention belongs to the technical field of electronic ceramic substrate preparation, and relates to a zirconia toughened alumina (ZTA) ceramic substrate with high bending strength, high fracture toughness and excellent electrical properties, and specifically relates to a ZrO 2 As a toughening phase, it will not cause leakage current problems. At the same time, it can also meet the mechanical and electrical performance requirements of ZTA ceramic copper-clad substrates and heating elements. The grain-graded zirconia toughened alumina ceramic substrate and its Preparation Process. Background technique [0002] Zirconia Toughened Alumina (ZTA, Zirconia Toughened Alumina) ceramic is a composite ceramic material with Al2O3 as the matrix and partially stabilized ZrO2 as the toughening phase. The mechanical properties of ZTA ceramics are between Al2O3 ceramics and ZrO2 ceramics. It not only retains the high hardness and wear resistance of Al2O3 ceramics, but ...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/622C04B35/64
CPCC04B35/10C04B35/622C04B35/64C04B2235/3244C04B2235/6025C04B2235/6567C04B2235/96C04B35/119C04B2235/3222C04B35/632C04B2235/668C04B2235/786C04B2235/785C04B2235/76C04B35/6342C04B35/6264C04B2235/765C04B2235/5445C04B2235/5436C04B35/6261C04B2235/3217C04B2235/3246
Inventor 吴崇隽段明新贺云鹏
Owner SINOCERAM TECH (ZHENGZHOU) CO LTD
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