Low-Loss Microwave Dielectric Ceramic

There is provided a low-loss microwave dielectric ceramic having a composition represented by xCaO.yLn2O3.zAl2O3.mTiO2 wherein Ln is Nd or Sm, 25.0 mole %<=x<=75.0 mole %, 10.0 mole %<=y<=30.0 mole %, 10.0 mole %<=z<=30.0 mole %, 0.8 mole %<=m<=20.0 mole %, x+y+z+m=100 mole %...

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Bibliographic Details
Main Authors FAN XIECHENG, CHEN XIANGMING
Format Patent
LanguageEnglish
Published 29.10.2009
Subjects
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
LIME, MAGNESIA
METALLURGY
REFRACTORIES
SLAG
TREATMENT OF NATURAL STONE
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Summary:There is provided a low-loss microwave dielectric ceramic having a composition represented by xCaO.yLn2O3.zAl2O3.mTiO2 wherein Ln is Nd or Sm, 25.0 mole %<=x<=75.0 mole %, 10.0 mole %<=y<=30.0 mole %, 10.0 mole %<=z<=30.0 mole %, 0.8 mole %<=m<=20.0 mole %, x+y+z+m=100 mole %. It has a dielectric constant in the range from 18 to 25, an extremely large Qf value ranging from 80,000 to 200,000 GHz, and a temperature coefficient of resonant frequency tunable in the vicinity of 0. It can make the applications of dielectric resonators, filters, and antennas extended to higher frequency and larger power; it can also be applied to microwave capacitors, temperature-compensated capacitors, microwave substrates, et al.
Bibliography:Application Number: US20080186479