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CaO-Al2O3-MgO-ZrO2-SiO2 series aluminum oxide electronic ceramics

A technology of aluminum oxide and electronic ceramics, applied in the field of electronic ceramics manufacturing, can solve the problems of low viscosity at high temperature, large grain size, unsightly appearance, etc., and achieve the effects of good comprehensive performance, high flexural strength, and not easy to be broken.

Inactive Publication Date: 2008-08-27
大埔县特陶科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] CaO-Al 2 o 3 -SiO 2 Because it contains a certain amount of CaO, the high-temperature viscosity of CaO (close to the metallization temperature) is relatively low, and the macroscopic performance is better adaptability. Therefore, many manufacturers use CaO-Al 2 o 3 -SiO 2 system, but relevant practical experience proves that: CaO-Al 2 o 3 -SiO 2 The crystal grains of ceramics are relatively large, and most of them are lath-like crystals. After firing, yellow and gray spots are easy to form, which is very unsightly.

Method used

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  • CaO-Al2O3-MgO-ZrO2-SiO2 series aluminum oxide electronic ceramics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The CaO-Al described in the embodiment of the present invention 2 o 3 -MgO-ZrO 2 -SiO 2 It is aluminum oxide electronic ceramics, and the electronic ceramics is composed of the following raw materials in weight percentages:

[0036] Al 2 o 3 94% SiO 2 4% ZrO 2 0.3%

[0037] CaO 0.2% MgO 0.8% BaO 0.5%

[0038] Fe 2 o 3 0.02% and the rest are impurities.

[0039] Its manufacturing process is roughly as follows:

[0040] 1. The raw material Al 2 o 3 , SiO 2 , ZrO 2 , CaO, MgO, etc. are ground into powder;

[0041] 2. Add paraffin liquid to make slurry;

[0042] 3. Forming after mixing raw materials;

[0043] 4. Carry out the wax removal process, the temperature required for the wax removal process is about 1100 °C;

[0044] 5. The sintering process is carried out in a double-hole tunnel kiln, and the temperature required for the sintering process is about 1650°C;

[0045] 6. Processing, grinding and modification;

[0046] 7. Finished product pack...

Embodiment 2

[0050] The CaO-Al described in the embodiment of the present invention 2 o 3 -MgO-ZrO 2 -SiO 2 It is aluminum oxide electronic ceramics, and the electronic ceramics is composed of the following raw materials in weight percentages:

[0051] Al 2 o 3 93.6% SiO 2 3.6% ZrO 2 0.2%

[0052] CaO 0.3% MgO 0.9% BaO 0.6%

[0053] Fe 2 o 3 0.05% and the rest are impurities.

[0054] The production process of this embodiment and the production process of Example 1 are both traditional ceramic manufacturing processes, and will not be described in detail here.

[0055] The product of this embodiment has the characteristics of expansion coefficient, crystal phase grain size, etc., which can meet the user's glazing quality requirements, especially in the metallization sealing process, which can eliminate the phenomenon of yellow and gray spots, so that the qualified rate of metal sealing quality is increased from the original 80%. To more than 96%, the product tensile streng...

Embodiment 3

[0057] The CaO-Al described in the embodiment of the present invention 2 o 3 -MgO-ZrO 2 -SiO 2 It is aluminum oxide electronic ceramics, and the electronic ceramics is composed of the following raw materials in weight percentages:

[0058] Al 2 o 3 93% SiO 2 3% ZrO 2 0.6%

[0059] CaO 0.4% MgO 1% BaO 0.2%

[0060] Fe 2 o 3 0.01% and the rest are impurities.

[0061] The production process of this embodiment and the production process of Example 1 are both traditional ceramic manufacturing processes, and will not be described in detail here.

[0062] The product of this embodiment has the advantages of good comprehensive performance, high bulk density, high air tightness, high flexural strength, good thermal stability, not easy to break and no yellow and gray spots, as shown in attached drawings 1 and 2 shown.

[0063] ZrO 2 (Zirconium dioxide) is a new type of toughened ceramic material, which has the characteristics of wear resistance, corrosion resistance...

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Abstract

The invention discloses an aluminum oxide electronic ceramic of CaO-AI<2>O<3>-MgO-ZrO<2>-SiO<2> system, which is composed of 93-94 wt% of AI<2>O<3>, 3-4 wt% of SiO<2>, 0.2-0.6 wt% of ZrO<2>, 0.2-0.4 wt% of CaO, 0.8-1 wt% of MgO, 0.2-0.6 wt% of BaO and 0.01-0.05 wt% of Fe<2>O<3>, while the left is foreign material. The invention adds zirconium material into the prior ceramic materials to satisfy the glazing demand of user at expansion factor, grain phase and granularity and eliminate yellow brown spot at metallization sealing process, to improve the pass percentage of metal sealing quality of at least 96%, improve tensile strength and acid and alkali resistant degrees, and improve all quality indexes. The inventive product has better compressive performance, high air tightness, high flexural strength, high acid and alkali resistance, high direct current breakdown strength and non yellow brown spot, which is not easy to break.

Description

technical field [0001] The invention relates to the technical field of electronic ceramics manufacturing, specifically a CaO-Al 2 o 3 -MgO-ZrO-SiO 2 It is aluminum oxide electronic ceramics. Background technique [0002] At present, Al 2 o 3 Porcelain, which is due to Al 2 o 3 Porcelain has good comprehensive properties, such as high mechanical degree, good insulation performance, excellent thermal shock resistance, matching thermal expansion coefficient, etc., especially the convenient source of raw materials, low price, and simple and feasible manufacturing process, so it is currently the most used in the vacuum electronics industry. It is a kind of structural material with the widest, largest amount and most varieties. [0003] Al 2 o 3 Porcelain has been quite mature after decades of development, research and industrialization. At present, it is still based on CaO-Al 2 o 3 -SiO 2 , MgO-Al 2 o 3 -SiO 2 , CaO-Al 2 o 3 -MgO-SiO 2 The three systems are the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10
Inventor 陈国安
Owner 大埔县特陶科技有限公司
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