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Stable-temperature medium-temperature-sintering microwave dielectric ceramic and preparation method thereof
The invention discloses a stable-temperature medium-temperature-sintering microwave dielectric ceramic and a preparation method thereof. The preparation method comprises the following steps: proportioning MgO, TiO2 and CaCO3 according to the stoichiometric formula 0.93MgTiO3-0.07CaTiO3, carrying out ball milling, drying, screening and presintering at 900-1150 DEG C; proportioning La2O3 and Al2O3 according to the stoichiometric formula LaAlO3, carrying out ball milling, drying, screening and presintering at 1100-1300 DEG C; and mixing the two presintered powders in a mole ratio of 99:1, adding 1-3 wt% of ZnO and 1-3 wt% of B2O3, carrying out ball milling, drying, screening, granulating, compacting into a green compact, and sintering at 1075-1175 DEG C to prepare the stable-temperature medium-temperature-sintering microwave dielectric ceramic. The Qf value is up to 33000-57000 GHz, tau reaches -9.1 to -2.6 ppm/DEG C, and the optimal sintering temperature is lowered to 1125 DEG C. The stable-temperature medium-temperature-sintering microwave dielectric ceramic has the advantages of simple preparation technique and excellent microwave dielectric properties, and has wide application prospects.
Stable-temperature medium-temperature-sintering microwave dielectric ceramic and preparation method thereof
The invention discloses a stable-temperature medium-temperature-sintering microwave dielectric ceramic and a preparation method thereof. The preparation method comprises the following steps: proportioning MgO, TiO2 and CaCO3 according to the stoichiometric formula 0.93MgTiO3-0.07CaTiO3, carrying out ball milling, drying, screening and presintering at 900-1150 DEG C; proportioning La2O3 and Al2O3 according to the stoichiometric formula LaAlO3, carrying out ball milling, drying, screening and presintering at 1100-1300 DEG C; and mixing the two presintered powders in a mole ratio of 99:1, adding 1-3 wt% of ZnO and 1-3 wt% of B2O3, carrying out ball milling, drying, screening, granulating, compacting into a green compact, and sintering at 1075-1175 DEG C to prepare the stable-temperature medium-temperature-sintering microwave dielectric ceramic. The Qf value is up to 33000-57000 GHz, tau reaches -9.1 to -2.6 ppm/DEG C, and the optimal sintering temperature is lowered to 1125 DEG C. The stable-temperature medium-temperature-sintering microwave dielectric ceramic has the advantages of simple preparation technique and excellent microwave dielectric properties, and has wide application prospects.
Stable-temperature medium-temperature-sintering microwave dielectric ceramic and preparation method thereof
LI LINGXIA (author) / LI SAI (author) / GAO ZHENGDONG (author) / LYU XIAOSONG (author) / SUN HAO (author)
2015-09-30
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
Medium/low-sintering-temperature microwave dielectric ceramic and preparation method thereof
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