ca‑nd‑ti microwave dielectric ceramic material and preparation method thereof

Abstract

The present invention provides a high quality factor microwave dielectric ceramic material substituted by B position and its preparation method. The B position is substituted to achieve the purpose of controlling the microwave properties of the system; M represents Nb whose valence is higher than tetravalent, N represents one or several other elements whose valence is lower than tetravalent and the ionic radius is similar to Ti, and M and N are simultaneously Substituted or replaced alone; the preparation method is to determine the respective mass percentages according to the general chemical formula, mix by ball milling, pre-calcine at 1050-1150°C, and then sinter at 1350-1450°C; the dielectric constant of the prepared material ( 70~100) and frequency temperature coefficient are adjustable while maintaining excellent Q×f value (9000GHz~16000GHz), the formula does not contain volatile or heavy metals such as Pb and Cd, and the performance is greatly improved compared with other systems. Raw materials The domestic supply is sufficient, and the price is relatively low compared to other systems, which makes it possible to reduce the cost of high-performance microwave ceramics.

Description

technical field [0001] The invention relates to the field of electronic component materials, in particular to a method for preparing a B-site substituted Ca-Nd-Ti microwave dielectric ceramic material with high quality factor. Background technique [0002] In recent years, with the rapid development of mobile communication technology and Internet of Things technology, radio frequency identification technology (radiofrequency identification, RFID) develops rapidly. Radio frequency identification technology is not only one of the core technologies of the sensing layer of the Internet of Things, but also a wireless communication technology. Its system consists of readers, antennas and electronic tags, and many of the components need to use microwave dielectric ceramics. Therefore, the microwave dielectric ceramic is the core basic material of the system, and the dielectric constant of the microwave dielectric ceramic material is generally required to be 60-100. With the develo...

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Problems solved by technology

Both have high dielectric constant and Q×f value, but the excessive frequency temperature coefficient hinders the promotion of the two systems in practical applications

CaTi was reported by Zhao Fei et al. 1-x (Mg 1 / 3 Nb 2 / 3 ) x o 3 performance, but the dielectric constant of the obtained material is generally low

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