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Ceramic Composition And Ceramic Injection-molding Process

A technology of ceramics and materials, used in the field of manufacturing combustion chamber pressure sensors, can solve problems such as joints, and achieve the effects of reducing cooling shrinkage, high shape accuracy, clean and efficient combustion

Active Publication Date: 2014-07-16
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these systems may have good rheological properties during die casting, they may cause joint seams during casting distribution.

Method used

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  • Ceramic Composition And Ceramic Injection-molding Process
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  • Ceramic Composition And Ceramic Injection-molding Process

Examples

Experimental program
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Embodiment Construction

[0070] exist figure 1 A partial area of ​​the combustion chamber pressure sensor 10 is shown in . Such a combustion chamber pressure sensor 10 comprises two insulators 12 serving as pressure stamps. In this case, the pressure stamp acts on the piezoelectric element 14 (for example a quartz crystal). If a force (as indicated by arrow 18 ) is exerted on pressure stamp or insulator 12 , piezoelectric element 14 can emit a signal, which can be transmitted, for example, via conductive structure 16 to an evaluation unit. One force can be formed, for example, by a sliding pin displaced by the pressure in the combustion chamber, and the other force can be formed by a fixed stop.

[0071] Such an insulator 12 is in particular a ceramic body with a purely exemplary and non-limiting content of ceramic phases greater than or equal to 50% by weight and a purely exemplary and non-limiting content of glass phases of less than or equal to 50% by weight, wherein the ceramic phase with alumi...

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Abstract

A ceramic composition for an injection-molding process for producing a combustion chamber pressure sensor (10), in particular for producing an insulation punch (12) of a combustion chamber pressure sensor (10), includes a ceramic component in a proportion of greater than or equal to 50% by weight and a glass component in a proportion of less than or equal to 50% by weight. The ceramic component includes aluminum oxide. The glass component includes silicon dioxide or a silicon dioxide precursor. The ceramic composition further includes an alkaline earth metal oxide or an alkaline earth metal oxide precursor. The ceramic composition allows production of an insulation punch having a particularly good insulation capability. The invention further relates to a ceramic injection-molding process.

Description

technical field [0001] The invention relates to a ceramic material for a die-casting method for producing a combustion chamber pressure sensor, in particular for an insulating punch for producing a combustion chamber pressure sensor, and to a ceramic die-casting method. Background technique [0002] Due to their specific material-specific properties, different ceramics are increasingly being used in mechanical engineering as well as in the automotive, chemical, electronics, consumer goods and generally microsystems and process technology fields. A defect-free microstructure is advantageous for maximum load-carrying and reliability of such materials. It is particularly advantageous, especially in the automotive sector, that the components can be produced as far as possible without rework, with tight tolerances and at low cost. [0003] Increasingly, functionally integrated components are provided here. This means, for example, that special functional layers, such as heaters...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/634C04B35/622G01L23/26C03C10/02
CPCB28B1/24C03C14/00C03C2214/20C04B35/117C04B35/634C04B2235/3206C04B2235/3208C04B2235/3213C04B2235/349C04B2235/36C04B2235/6022C03C10/0036C04B35/64
Inventor M.舒贝特A.莫克T.洛伊布尔I.赫伦
Owner ROBERT BOSCH GMBH