Yttrium niobate solid-phase reaction synthetic sintering method capable of being used for microwave dielectric ceramic

Abstract

The invention relates to a microwave dielectric function ceramic material which is yttrium niobate and discloses a solid state reaction synthesis sintering method of the yttrium niobate which is a synthesis method with the advantages of abundant raw materials and simple and economical process. The method is: Y2O3 powder and Nb2O5 powder are weighed according to the molar ratio of 1 to 1, the purity of Nb2O5 is 99.9 percent, d50 is equal to 8.3 micrometers, the purity of the Y2O3 is 99.8 percent, and d50 is equal to 7.9 micrometers; milling balls are weighted according to the ball-material ratio of 2 to 1, and dehydrated alcohol is weighted according to the liquid-material ratio of 0.7 to 1 and is put in a ball milling tank to be milled. The mixed slurry is separated from the milling balls, dried, sieved, pressed to be molded, sintered at the temperature of 1100-1350 DEG C, cooled and sintered into the YNbO4 ceramic through the solid phase reaction. The room temperature dielectric constant of the YNbO4 is 7- 26 and the quality factor is 0.7*10<3>-27*10<4>.

Description

technical field [0001] The invention relates to a functional ceramic material. Prepared YNbO 4 The ceramic material can be used as a microwave dielectric ceramic material. Background technique [0002] Niobate materials are an important class of electronic materials and have been widely used in the manufacture of capacitors and optoelectronic devices. Later, J.Cato et al. studied their dielectric properties at microwave frequencies, and found that such materials have high dielectric constants and Q values ​​at microwave frequencies, and the temperature coefficient of resonance frequency is close to zero. interest of. Since the 1980s, due to the rapid development of mobile communication and satellite communication to the microwave frequency band, the research of new niobate microwave dielectric ceramic materials has attracted more and more attention. [0003] Similar to perovskite-type composite oxides with [TiO6] octahedron as the framework, niobate materials generally h...

AI Technical Summary

Problems solved by technology

Existing research results and structural analysis show that, because the structure is similar to the currently commonly used calcium titanate structural ceramics, and has the [NbO 6 ] Octahedron is the layered structure of the skeleton, and it also has the special properties of rare earth elements, YNbO 4 Ceramics will also have a very unique position and value in the field of microwave dielectric ceramics, but there are no special research reports on its preparation methods and dielectric properties.

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