Low-cost microwave dielectric ceramic material and preparation method thereof

Abstract

The invention particularly relates to a low-cost microwave dielectric ceramic material and a preparation method thereof, wherein the chemical composition is xCaTiO3+(1-x)LaAlO3+ywt%Co2O3, x is more than or equal to 0.35 and is less than or equal to 0.65, and y is more than or equal to 0 and is less than equal to 1. According to the present invention, the product is a low-cost CaTiO3-LaAlO3-based microwave dielectric ceramic capable of replacing CaTiO3-NdAlO3-based ceramics, has the greatly-reduced production cost, has characteristics of low cost and medium dielectric constant, is suitable fordielectric resonators, wave filters, duplexes and other microwave devices, and further has characteristics of adjustable dielectric constant, high Q.f and excellent resonance frequency temperature coefficient [tau]f. The invention further provides a preparation method of the low-cost microwave dielectric ceramic material, wherein the preparation method has characteristics of low raw material priceand simple and easy-performing process route.

Description

technical field [0001] The invention belongs to the technical field of electronic information functional materials and devices, and specifically relates to a low-cost medium dielectric constant, high Q f and a resonant frequency temperature coefficient τ f A microwave dielectric ceramic material with excellent characteristics and a preparation method thereof. It can be used to make microwave devices such as dielectric resonators, filters and duplexers. Background technique [0002] With the rapid development of modern communication technology, especially the rapid advancement of 4G and 5G networks, miniaturization, integration and low cost have become the development direction of mobile communication and mobile terminals. The way to achieve miniaturization, high stability and low cost of communication equipment is the integration of microwave circuits. Traditional metal resonators and metal waveguides are too bulky and heavy, which limits the development of microwave integ...

AI Technical Summary

Problems solved by technology

CaTiO used in domestic industrial production 3 -NdAlO 3 The series of ceramics are mainly purchased from Japan for the synthesis of ceramic powder, which costs a lot of foreign exchange and is not conducive to independent technological progress

In addition, the rare earth oxide Nd 2 o 3 The raw material is expensive, the price is for CaTiO 3 -NdAlO 3 Commercial application promotion of microwave dielectric ceramics is a very big limiting factor

Images