Shlyakhtin, Oleg A. Oh, Young-Jei 2024-01-21T02:04:29Z 2024-01-21T02:04:29Z 2021-09-01 2006-11 0002-7820 https://pubs.kist.re.kr/handle/201004/134997 A possibility to produce microwave (MW) dielectric materials by liquid-phase sintering of fine particles was investigated. Zn3Nb2O8 powders with a grain size 50-300 nm were obtained by the thermal decomposition of freeze-dried Zn-Nb hydroxides or frozen oxalate solutions. The crystallization of Zn3Nb2O8 from amorphous decomposition products was often accompanied by the simultaneous formation of ZnNb2O6. Maximum sintering activity was observed for single-phase crystalline Zn3Nb2O8 powders obtained at the lowest temperature. The sintering of as-obtained powders with CuO-V2O5 sintering aids results in producing MW dielectric ceramics with a density 93%-97% of the theoretical, and a Q x f product up to 36 000 GHz at sintering temperature (T-s)>= 680 degrees C. The high level of MW dielectric properties of ceramics was ensured by intensive grain growth during the densification and the thermal processing of ceramics. English WILEY MICROWAVE DIELECTRIC-PROPERTIES THERMAL-DECOMPOSITION NIOBATES V2O5 ADDITIVES MN NB Low temperature sintering of Zn3Nb2O8 ceramics from fine powders Article 10.1111/j.1551-2916.2006.01246.x 1 JOURNAL OF THE AMERICAN CERAMIC SOCIETY, v.89, no.11, pp.3366 - 3372 JOURNAL OF THE AMERICAN CERAMIC SOCIETY 89 11 3366 3372 scie scopus 000241408600007 2-s2.0-33750271582 Materials Science, Ceramics Materials Science Article MICROWAVE DIELECTRIC-PROPERTIES THERMAL-DECOMPOSITION NIOBATES V2O5 ADDITIVES MN NB Microwave dielectrics Freeze drying Sintering aids LTCC Precipitation