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High-dielectric low-loss microwave dielectric ceramic material and preparation method thereof
The invention provides a high-dielectric low-loss microwave dielectric ceramic material. The general chemical formula of the material is (Na0.5+yLn0.5)(Ti1-xCx)O3, Ln=La or Nd or Sm, wherein x is larger than or equal to 0.01 and is smaller than or equal to 0.04, y is larger than or equal to 0.05 or is smaller than or equal to 0.12, the composition of C is VW, V represents Nb with the valence state higher than four, W represents a single ion or compound ions with the valence state lower than or equal to four and the average ion radius approximating to Ti4+, and V and M achieve simultaneous replacement or independent replacement. The invention further provides a preparation method of the high-dielectric low-loss microwave dielectric ceramic material. The preparation method comprises the steps of burdening, ball grinding, drying and sieving, presintering, pelleting, compression molding and sintering. The prepared material has the high dielectric constant and high Q*f value, contains no Pb or Cd or other volatile toxic metals in the formula, and is stable in performance and capable of meeting application requirements of modern microwave devices, raw materials are sufficiently supplied in China, the cost is relatively low, and the high-performance microwave ceramic can be low in cost.
High-dielectric low-loss microwave dielectric ceramic material and preparation method thereof
The invention provides a high-dielectric low-loss microwave dielectric ceramic material. The general chemical formula of the material is (Na0.5+yLn0.5)(Ti1-xCx)O3, Ln=La or Nd or Sm, wherein x is larger than or equal to 0.01 and is smaller than or equal to 0.04, y is larger than or equal to 0.05 or is smaller than or equal to 0.12, the composition of C is VW, V represents Nb with the valence state higher than four, W represents a single ion or compound ions with the valence state lower than or equal to four and the average ion radius approximating to Ti4+, and V and M achieve simultaneous replacement or independent replacement. The invention further provides a preparation method of the high-dielectric low-loss microwave dielectric ceramic material. The preparation method comprises the steps of burdening, ball grinding, drying and sieving, presintering, pelleting, compression molding and sintering. The prepared material has the high dielectric constant and high Q*f value, contains no Pb or Cd or other volatile toxic metals in the formula, and is stable in performance and capable of meeting application requirements of modern microwave devices, raw materials are sufficiently supplied in China, the cost is relatively low, and the high-performance microwave ceramic can be low in cost.
High-dielectric low-loss microwave dielectric ceramic material and preparation method thereof
TANG BIN (Autor:in) / FANG ZIXUAN (Autor:in) / SUN CHENGLI (Autor:in) / ZHONG CHAOWEI (Autor:in) / ZHANG SHUREN (Autor:in)
27.01.2016
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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