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Low-temperature sintered magnesium lithium niobate system microwave dielectric ceramic
The invention discloses low-temperature sintered magnesium lithium niobate system microwave dielectric ceramic. The composition formula of the low-temperature sintered magnesium lithium niobate system microwave dielectric ceramic is Li3Mg2NbO6-xLBS, wherein the x is greater than or equal to 0.5 percent but is smaller than or equal to 3 percent; the LBS comprises 50 weight percent of Li2CO3, 40.24 weight percent of B2O3 and 9.76 weight percent of SiO2. Firstly, Li2CO3, MgO and Nb2O5 are mixed according to Li3Mg2NbO6, are subjected to ball grinding, drying and sieving and are pre-sintered at 1050 DEG C; the LBS with the mass fraction x being 0.5 percent to 3 percent is added; then, secondary ball grinding and drying are carried out; paraffin with the weight percentage being 8 to 10 percent is added for granulation; particles are pressed into a blank; the blank is sintered at 800 to 950 DEG C; the lithium niobate system microwave dielectric ceramic is prepared. The low-temperature sintered magnesium lithium niobate system microwave dielectric ceramic has the advantages that the sintering temperature can be successfully lowered to 875 DEG C; the dielectric constant is 14.8; the quality factor is 86,721 GHz; the resonant frequency temperature coefficient is -15.50 ppm/DEG C; the preparation process is simple; no process pollution exists; the low-temperature sintered magnesium lithium niobate system microwave dielectric ceramic belongs to an LTCC (low-temperature co-fired ceramic) microwave dielectric material with good prospects.
Low-temperature sintered magnesium lithium niobate system microwave dielectric ceramic
The invention discloses low-temperature sintered magnesium lithium niobate system microwave dielectric ceramic. The composition formula of the low-temperature sintered magnesium lithium niobate system microwave dielectric ceramic is Li3Mg2NbO6-xLBS, wherein the x is greater than or equal to 0.5 percent but is smaller than or equal to 3 percent; the LBS comprises 50 weight percent of Li2CO3, 40.24 weight percent of B2O3 and 9.76 weight percent of SiO2. Firstly, Li2CO3, MgO and Nb2O5 are mixed according to Li3Mg2NbO6, are subjected to ball grinding, drying and sieving and are pre-sintered at 1050 DEG C; the LBS with the mass fraction x being 0.5 percent to 3 percent is added; then, secondary ball grinding and drying are carried out; paraffin with the weight percentage being 8 to 10 percent is added for granulation; particles are pressed into a blank; the blank is sintered at 800 to 950 DEG C; the lithium niobate system microwave dielectric ceramic is prepared. The low-temperature sintered magnesium lithium niobate system microwave dielectric ceramic has the advantages that the sintering temperature can be successfully lowered to 875 DEG C; the dielectric constant is 14.8; the quality factor is 86,721 GHz; the resonant frequency temperature coefficient is -15.50 ppm/DEG C; the preparation process is simple; no process pollution exists; the low-temperature sintered magnesium lithium niobate system microwave dielectric ceramic belongs to an LTCC (low-temperature co-fired ceramic) microwave dielectric material with good prospects.
Low-temperature sintered magnesium lithium niobate system microwave dielectric ceramic
ZHANG PING (author) / ZHAO XINGYU (author) / ZHAO YONGGUI (author)
2016-01-20
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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