Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Low-loss zinc-zirconium-niobium microwave dielectric ceramic
The invention discloses low-loss zinc-zirconium-niobium microwave dielectric ceramic. The composition of the ceramic is ZnZr(Nb1-xAx)2O8, wherein A is Ta5+ or Sb5+, and x is more than or equal to 0 and less than or equal to 0.1. The ceramic is prepared by comprising the following steps: firstly, carrying out batching according to a chemical formula with ZnO, ZrO2, TiO2, Nb2O5, Ta2O5 and Sb2O5 as raw materials, then carrying out ball milling, drying and sieving, and carrying out preheating at 1050 to 1150 DEG C for 4 hours; and carrying out granulation, then carrying out compression molding into a green body, and carrying out sintering at 1225 to 1275 DEG C so as to prepare the microwave dielectric ceramic. According to the invention, since Ta5+ or Sb5+ is used to replace Nb5+, microwave dielectric performances are improved, wherein dielectric constant is 25.98 to 26.27; temperature coefficient of resonant frequency reaches minus 56.02 to minus 56.99 ppm/DEG C; and a maximum value of quality factor reaches 75800 to 89400 GHz. The low-loss zinc-zirconium-niobium microwave dielectric ceramic provided by the invention has simple preparation process and environment-friendly process, and is a promising microwave dielectric material.
Low-loss zinc-zirconium-niobium microwave dielectric ceramic
The invention discloses low-loss zinc-zirconium-niobium microwave dielectric ceramic. The composition of the ceramic is ZnZr(Nb1-xAx)2O8, wherein A is Ta5+ or Sb5+, and x is more than or equal to 0 and less than or equal to 0.1. The ceramic is prepared by comprising the following steps: firstly, carrying out batching according to a chemical formula with ZnO, ZrO2, TiO2, Nb2O5, Ta2O5 and Sb2O5 as raw materials, then carrying out ball milling, drying and sieving, and carrying out preheating at 1050 to 1150 DEG C for 4 hours; and carrying out granulation, then carrying out compression molding into a green body, and carrying out sintering at 1225 to 1275 DEG C so as to prepare the microwave dielectric ceramic. According to the invention, since Ta5+ or Sb5+ is used to replace Nb5+, microwave dielectric performances are improved, wherein dielectric constant is 25.98 to 26.27; temperature coefficient of resonant frequency reaches minus 56.02 to minus 56.99 ppm/DEG C; and a maximum value of quality factor reaches 75800 to 89400 GHz. The low-loss zinc-zirconium-niobium microwave dielectric ceramic provided by the invention has simple preparation process and environment-friendly process, and is a promising microwave dielectric material.
Low-loss zinc-zirconium-niobium microwave dielectric ceramic
ZHANG PING (Autor:in) / ZHAO YONGGUI (Autor:in)
23.12.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
| Europäisches Patentamt | 2016
| Europäisches Patentamt | 2021
Low-temperature-sintered zinc-titanium-niobium-series microwave dielectric ceramic
| Europäisches Patentamt | 2016
Sintering annealing process for barium-cobalt-zinc-niobium system microwave dielectric ceramic
| Europäisches Patentamt | 2020
Barium-cobalt-zinc-niobium-based microwave dielectric ceramic and preparation method thereof
| Europäisches Patentamt | 2020