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Multilayer ceramic capacitor dielectric material at super-wide working temperature range and preparation method thereof
The invention discloses a multilayer ceramic capacitor dielectric material at the super-wide working temperature range. Raw material composition and mole percentage is BaTiO3: aBi(Zn2/3Nb1/3)O3: bNaNbO3=1:a:b, wherein a is less than or equal to 0.325 and greater than or equal to 0.25, and b is less than or equal to 0.02 and greater than or equal to 0.01. A preparation method of the multilayer ceramic capacitor dielectric material comprises the following steps: firstly burdening according to the mole ratio of ZnO to Bi2O3 to Nb2O5 being 1: 4/3: 1/3, presintering at 900 DEG C to prepare Bi(Zn2/3Nb1/3)O3 solid particles, carrying out secondary ball-milling, drying, and sieving; then burdening according to the mole ratio of Na2CO3 to Nb2O5 being 1: 1, presintering at 1000 DEG C to prepare NaNbO3 solid particles, carrying out secondary ball-milling, drying, and sieving; and adding a mol% of Bi(Zn2/3Nb1/3)O3 (a is less than or equal to 0.325 and greater than or equal to 0.25) and b mol% of NaNbO3 (b is less than or equal to 0.02 and greater than or equal to 0.01) with the BaTiO3 as the base, granulating and compressing to obtain a green body, and sintering the green body at 1225-1250 DEG C so as to prepare the multilayer ceramic capacitor dielectric material. Dielectric loss of the multilayer ceramic capacitor dielectric material at the working temperature range of minus 55 DEG C to 310 DEG C is maintained at tan delta being less than or equal to 0.05, and dielectric constant epsilon r is greater than or equal to 700 +/- 19%, and insulating property Rho V is greater than or equal to 1011 Omega.cm. The preparation technology is simple, the powder obtained has homogeneous components, and the preparation process is pollution-free.
Multilayer ceramic capacitor dielectric material at super-wide working temperature range and preparation method thereof
The invention discloses a multilayer ceramic capacitor dielectric material at the super-wide working temperature range. Raw material composition and mole percentage is BaTiO3: aBi(Zn2/3Nb1/3)O3: bNaNbO3=1:a:b, wherein a is less than or equal to 0.325 and greater than or equal to 0.25, and b is less than or equal to 0.02 and greater than or equal to 0.01. A preparation method of the multilayer ceramic capacitor dielectric material comprises the following steps: firstly burdening according to the mole ratio of ZnO to Bi2O3 to Nb2O5 being 1: 4/3: 1/3, presintering at 900 DEG C to prepare Bi(Zn2/3Nb1/3)O3 solid particles, carrying out secondary ball-milling, drying, and sieving; then burdening according to the mole ratio of Na2CO3 to Nb2O5 being 1: 1, presintering at 1000 DEG C to prepare NaNbO3 solid particles, carrying out secondary ball-milling, drying, and sieving; and adding a mol% of Bi(Zn2/3Nb1/3)O3 (a is less than or equal to 0.325 and greater than or equal to 0.25) and b mol% of NaNbO3 (b is less than or equal to 0.02 and greater than or equal to 0.01) with the BaTiO3 as the base, granulating and compressing to obtain a green body, and sintering the green body at 1225-1250 DEG C so as to prepare the multilayer ceramic capacitor dielectric material. Dielectric loss of the multilayer ceramic capacitor dielectric material at the working temperature range of minus 55 DEG C to 310 DEG C is maintained at tan delta being less than or equal to 0.05, and dielectric constant epsilon r is greater than or equal to 700 +/- 19%, and insulating property Rho V is greater than or equal to 1011 Omega.cm. The preparation technology is simple, the powder obtained has homogeneous components, and the preparation process is pollution-free.
Multilayer ceramic capacitor dielectric material at super-wide working temperature range and preparation method thereof
LI LINGXIA (author) / ZHANG BOWEN (author) / CHEN JUNXIAO (author)
2016-02-03
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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