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AssigneeElectronics and Telecommunications Research Institute
InventorsJin Woo Hahn, Dong Young Kim, Sang Seok Lee, Tae Goo Choy
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The present invention relates to a ceramic dielectric material for communication components, which can be used in the microwave and millimeter wave frequency band. More particularly, the present invention relates to a dielectric ceramic composition for the microwave/millimeter wave frequency band having a very high quality factor and a low dielectric constant, and a method of manufacturing the dielectric ceramic using the same. The dielectric ceramic composition consists of spinel (MgAl2O4) as a major component and a small amount of lithium carbonate (Li2CO3) as a sub composition with a specific composition formula. The dielectric ceramic is manufactured from magnesia (MgO), alumina (Al2O3) and lithium carbonate (Li2CO3) as raw materials and through the ceramic processing of calcination, shaping and sintering. The obtained dielectric ceramic has the quality factor (Q×f) of 160,000 and the dielectric constant (εr) of 8.5. Composition formula: MgAl2O4+xLi2CO3(mol %) where, 0<x≦5 (mol %).
A spinel (MgAl2O4) system dielectric ceramic composition comprising spinel (MgAl2O4) as a major component and lithium carbonate (Li2CO3) as a sub component, wherein the composition formula of the spinel and the lithium carbonate is represented as the following equation;
A manufacturing method for the dielectric ceramic composition comprising spinet (MgAl2O4) as a major component and lithium carbonate (Li2CO3) as a sub component according to the composition formula written below, the method comprising:
Dependencies are inferred from the claim text.