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Glass ceramic mass and use thereof

A glass ceramic and material technology, applied in the direction of circuit substrate materials, printed circuit components, etc.

Inactive Publication Date: 2007-03-28
W C HERAEUS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The quality factors and Tkf values ​​of glass-ceramic substances are also influenced by increasing the glass content in such a way that glass-ceramic substances are no longer suitable, for example, for applications in microwave technology

Method used

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  • Glass ceramic mass and use thereof
  • Glass ceramic mass and use thereof

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Embodiment Construction

[0036] According to the embodiment, the glass ceramic substance is a powder composed of powders of an oxide ceramic and a glass material. The composition form of oxidized ceramic is BaRek 2 Ti 4 O 12 . The rare earth metal Rek is neodymium. Oxide ceramics have the divalent metal Ma2+ as an additive, and its form is zinc. In order to make oxide ceramics, approximately 1% by weight of zinc oxide is added to the corresponding amounts of barium oxide, titanium dioxide and neodymium trioxide, calcined or sintered, and then ground into corresponding powders.

[0037] The glass material has the following composition: 35.0 mole percent of boron trioxide, 23.0 mole percent of lanthanum trioxide, and 42 mole percent of titanium dioxide. In addition, alkaline earth metal oxides are added to the glass material. The ratio of 5% by weight or less of zirconium dioxide between boron trioxide and the sum of oxides of tetravalent metal titanium and zirconium is about 0.7.

[0038] The 100 volume pe...

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Abstract

The invention relates to a glass ceramic mass, comprising at least one oxide ceramic, containing barium, titanium and at least one rare earth metal Rek and at least one glass material, containing at least one oxide with boron and at least one oxide of a rare earth metal Reg. The glass material further contains either an oxide of a tetravalent metal Me4+, or at least one oxide of a pentavalent metal Me5+. A compression of the glass ceramic mass occurs above all by viscous flow. A low vitrification temperature can thus be achieved. Crystallisation products are produced during and / or after the compression. The rare earth oxide and the crystallisation products can be used to pre-determine each of a dielectric material property of the glass ceramic mass in a wide range such as permittivity (15 - 80), Q (350 - 5000) and Tf value (+ / - 20 ppm / K). The glass ceramic mass is characterised by a vitrification temperature of below 850 DEG C and can thus find application in LTCC (low temperature cofired ceramics) technology for the integration of a passive electrical component in the volume of a ceramic multi-layer body. Suppression of a lateral shrinkage may be achieved in a composite with a ceramic film blank made from another ceramic material compressed at a higher temperature.

Description

Technical field [0001] The invention relates to a glass ceramic material, which has at least one oxide ceramic and at least one glass material, wherein the oxide ceramic has barium, titanium and at least one rare earth metal Rek; and the glass material has at least one boron oxide. In addition, the present invention also relates to a glass ceramic material, which has at least one oxide ceramic and at least one glass material, wherein the oxide ceramic has barium, titanium and at least one rare earth metal Rek; and the glass material has at least one Boron oxide and at least one oxide containing at least one tetravalent metal Me4+. In addition to glass ceramic materials, applications of glass ceramic materials are also given. Background technique [0002] The listed glass ceramic materials are already known from US 5 264 403. The oxide ceramic of glass ceramic material is composed of barium oxide (BaO), titanium dioxide (TiO 2 ), a rare earth metal trioxide (Rek 2 O 3 ) And possib...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C14/00C03C8/14C04B35/46H05K1/03
CPCC03C14/004C03C8/14C03C14/00
Inventor B·舒尔茨W·A·施勒W·吉特尔M·埃贝尔斯坦W·维尔辛G·普罗伊O·德尔诺夫赛克C·莫德斯
Owner W C HERAEUS GMBH
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