Microwave dielectric composite composition

Details Microwave dielectric composite composition Microwave dielectric composite composition

2006-05-23

2006-05-23

Group, Karl (Department: 1755)

Compositions: ceramic

Ceramic compositions

Titanate, zirconate, stannate, niobate, or tantalate or...

Reexamination Certificate

active

07049258

ABSTRACT:
Various high quality microwave dielectric composite compositions are prepared by replacing a part of Ba, La or Ti with another element in a dielectric material represented by BanLa4Ti3+nO12+3n. A first embodiment thereof comprises a ceramic composition represented by (Ba1−xAx)nLa4Ti3+nO12+3n, wherein A is an alkaline earth metal element except Ba, and 0.5<n<5 and 0<x<0.5, which is a composite composition being homologous as the former dielectric material and having a chemical formula obtained by replacing a part of Ba with an alkaline earth metal element except Ba. Similarly, a part of La and a part of Ti can be replaced with a rare earth element except La and an element except Ti, respectively. The above various microwave dielectric composite compositions can be used for adjusting microwave dielectric characteristics of a material through replacing a part of a constituent element with another element and thus increasing the variety of the material for a dielectric resonator.

REFERENCES:
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patent: 6649554 (2003-11-01), Chang et al.
patent: 6905994 (2005-06-01), Ohsato et al.
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img id="CUSTOM-CHARACTER-00001" he="2.79mm" wi="1.02mm" file="US07049258-20060523-P00001.TIF" alt="custom character" img-content="character" img-format="tif" ?EPMAH M., Kimg id="CUSTOM-CHARACTER-00002" he="2.79mm" wi="1.44mm" file="US07049258-20060523-P00002.TIF" alt="custom character" img-content="character" img-format="tif" ?OBimg id="CUSTOM-CHARACTER-00003" he="2.79mm" wi="2.46mm" file="US07049258-20060523-P00003.TIF" alt="custom character" img-content="character" img-format="tif" ?Aimg id="CUSTOM-CHARACTER-00004" he="2.79mm" wi="2.12mm" file="US07049258-20060523-P00004.TIF" alt="custom character" img-content="character" img-format="tif" ?.M.,img id="CUSTOM-CHARACTER-00005" he="2.79mm" wi="1.02mm" file="US07049258-20060523-P00001.TIF" alt="custom character" img-content="character" img-format="tif" ?EKCAimg id="CUSTOM-CHARACTER-00006" he="2.79mm" wi="1.02mm" file="US07049258-20060523-P00001.TIF" alt="custom character" img-content="character" img-format="tif" ?OHAimg id="CUSTOM-CHARACTER-00007" he="2.79mm" wi="3.13mm" file="US07049258-20060523-P00005.TIF" alt="custom character" img-content="character" img-format="tif" ?Himg id="CUSTOM-CHARACTER-00008" he="2.79mm" wi="1.78mm" file="US07049258-20060523-P00006.TIF" alt="custom character" img-content="character" img-format="tif" ?IE <<img id="CUSTOM-CHARACTER-00009" he="2.79mm" wi="2.12mm" file="US07049258-20060523-P00007.TIF" alt="custom character" img-content="character" img-format="tif" ?RPOBCKimg id="CUSTOM-CHARACTER-00010" he="2.79mm" wi="1.78mm" file="US07049258-20060523-P00008.TIF" alt="custom character" img-content="character" img-format="tif" ?THimg id="CUSTOM-CHARACTER-00011" he="2.79mm" wi="1.78mm" file="US07049258-20060523-P00006.TIF" alt="custom character" img-content="character" img-format="tif" ?IE>> φA3img id="CUSTOM-CHARACTER-00012" he="2.79mm" wi="1.78mm" file="US07049258-20060523-P00009.TIF" alt="custom character" img-content="character" img-format="tif" ?I B Cimg id="CUSTOM-CHARACTER-00013" he="2.79mm" wi="1.78mm" file="US07049258-20060523-P00008.TIF" alt="custom character" img-content="character" img-format="tif" ?CTEMAX La2O2—TiO2- MO (M=Mg, Ca, Sr, Ba), (1983), vol. 28, No. 9, pp 2377-2379.
Hitoshi Ohsato et al., “Non-linear microwave quality factor change based on the site occupancy of cations on the tungstenbronze-type Ba6-3XR8+2xTi18O54(R-Rare Earth) solid solutions”,Ceramic Transactions(1999), vol. 100 (Dielectric Ceramic Materials), pp 42-50.
Takashi Okawa et al., “Microwave dielectric properties of BanLa4Ti3+nO12+3nhomologous series”, Japanese Journal of Applied Physics, Part1, Regular Papers, Short Notes & Review Papers (2001 nen, Sep.), vol. 40, No. 9B, pp 5779-5782.

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