Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Neodymium niobate ceramic having improved microwave dielectric characteristic by substituting neodymium ions with lanthanum ions
The invention discloses neodymium niobate ceramic having improved microwave dielectric characteristic by substituting neodymium ions with lanthanum ions. The formula of the neodymium niobate ceramic is (Nd1-xLax)NbO4, in the formula, x is less than or equal to 0.1. The preparation method of the neodymium niobate ceramic comprises the following steps: firstly, preparing Nd2O3, La2O3 and Nb2O5 according to the chemical formula, ball-milling, drying, screening, and calcining for 4 hours at 900-1000 DEG C; pelleting, pressing to form a blank, and sintering at 1225-1300 DEG C, thereby obtaining the neodymium niobate ceramic. As lanthanum ions are adopted to substitute Nd on the A site in NdNbO4, the microwave dielectric property can be improved, the dielectric constant of the neodymium niobate ceramic is 21.52, the quality factor of the neodymium niobate ceramic is 45600GHz, and the resonance frequency temperature coefficient of the neodymium niobate ceramic is up to 0ppm/DEG C. The neodymium niobate ceramic is simple in preparation process, environment-friendly in process and is a microwave medium material with a good application prospect.
Neodymium niobate ceramic having improved microwave dielectric characteristic by substituting neodymium ions with lanthanum ions
The invention discloses neodymium niobate ceramic having improved microwave dielectric characteristic by substituting neodymium ions with lanthanum ions. The formula of the neodymium niobate ceramic is (Nd1-xLax)NbO4, in the formula, x is less than or equal to 0.1. The preparation method of the neodymium niobate ceramic comprises the following steps: firstly, preparing Nd2O3, La2O3 and Nb2O5 according to the chemical formula, ball-milling, drying, screening, and calcining for 4 hours at 900-1000 DEG C; pelleting, pressing to form a blank, and sintering at 1225-1300 DEG C, thereby obtaining the neodymium niobate ceramic. As lanthanum ions are adopted to substitute Nd on the A site in NdNbO4, the microwave dielectric property can be improved, the dielectric constant of the neodymium niobate ceramic is 21.52, the quality factor of the neodymium niobate ceramic is 45600GHz, and the resonance frequency temperature coefficient of the neodymium niobate ceramic is up to 0ppm/DEG C. The neodymium niobate ceramic is simple in preparation process, environment-friendly in process and is a microwave medium material with a good application prospect.
Neodymium niobate ceramic having improved microwave dielectric characteristic by substituting neodymium ions with lanthanum ions
ZHANG PING (Autor:in) / ZHAO YONGGUI (Autor:in)
27.05.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
| Europäisches Patentamt | 2016
Calcium-neodymium-titanium microwave dielectric ceramic and preparation method thereof
| Europäisches Patentamt | 2021
Dielectric characteristics of gel-grown mixed neodymium-lanthanum-heptamolybdate crystals
| British Library Online Contents | 1995
Intermediate phases in lanthanum- and neodymium-cobalt systems
| Engineering Index Backfile | 1968
High-quality-factor neodymium niobate ceramic prepared by replacing niobium ion with stibium ion
| Europäisches Patentamt | 2015