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Method of making a ceramic arc discharge vessel and ceramic arc discharge vessel made by the method

A technology of ceramics and products, applied in the preparation of ceramic arc discharge tubes and the field of ceramic arc discharge tubes prepared therefrom

Inactive Publication Date: 2006-09-06
OSRAM SYLVANIA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Method of making a ceramic arc discharge vessel and ceramic arc discharge vessel made by the method
  • Method of making a ceramic arc discharge vessel and ceramic arc discharge vessel made by the method

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Embodiment Construction

[0013] see figure 1 , an embodiment of the present invention is a method of bonding two ceramic components 12, 14 to each other. The method comprises the steps of: preparing a 2 o 3 and Y(NO 3 ) 3 A water-based slurry in such an amount that when heated Al 2 o 3 and Y 2 o 3 The eutectic composite of the present invention, placing the slurry in direct contact with the two ceramic parts to be bonded to each other, and heating the slurry to a temperature at which the two ceramic parts are bonded to each other.

[0014] When one of the two ceramic components 12, 14 comprises (or consists of) polycrystalline alumina and the other comprises (or consists of) monocrystalline alumina and polycrystalline alumina (or consists of monocrystalline alumina and polycrystalline It is advantageous to use the method of this first embodiment when it consists of one of the crystalline aluminas. This method is expected to work also when one or both of the components comprise yttrium aluminu...

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Abstract

A method of bonding two ceramic parts to each other includes the steps of preparing a water-based slurry from Al 2 O 3 powder and Y(NO 3 ) 3 solution in amounts that yield a eutectic compound of Al 2 O 3 and Y 2 O 3 when heated, placing the slurry in liquid, solid or gaseous form in direct contact with two ceramic parts that are to be bonded to each other, and heating the slurry to a temperature that bonds the two ceramic parts to each other. The method is particularly useful to join two ceramic parts where one is comprised of polycrystalline alumina and the other is comprised of one of single crystal alumina and polycrystalline alumina, such as an arc discharge vessel for a high intensity discharge lamp.

Description

technical field [0001] The present invention relates to a method of interconnecting two ceramic parts and an article comprising two bonded ceramic parts, in particular to a method of manufacturing an arc discharge tube in which two ceramic parts are bonded to each other and the arc discharge tube itself. Background technique [0002] The ability to bond two ceramic parts to each other is a particularly desirable capability in many fields, especially for the production of arc discharge tubes in which at least one of the two ceramic parts is transparent or nearly transparent. Many methods of joining two ceramic parts to each other are known. [0003] For example, US Patent 6,012,303 (Axelson et al.) discloses a method of eutectically bonding two single crystal components to each other. The method joins one single-crystal sapphire component (sapphire is a transparent ceramic) to another single-crystal sapphire component. The two elements are bonded together with a slurry (or ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B37/00
CPCC04B2237/064B32B2315/02C04B2237/062C04B35/64C04B2235/665C04B2235/666C04B2235/3217C04B2235/3225H01J9/247C04B37/005C04B35/653C04B2237/343
Inventor D·卡德维尔A·赫卡S·科特
Owner OSRAM SYLVANIA INC