Low-temperature sintering Ti-base microwave medium ceramic material and preparation thereof

Abstract

The invention discloses a Ti-based microwave medium ceramics material by low-temperature sintering. The Ti-based microwave medium ceramics material takes rutile TiO2 as a main phase. The general formula of the prescription of the invention is that: (AxM2x)(NyTi1-y)1-3xO2, (BxM3x)(NyTi1-y)1-4xO2, (CxMx)(NyTi1-y)1-2xO2 or (1-m) TiO2-mBi2Ti4O11, wherein, the A is one of bivalent ions such as Zn<2+>,Cu<2+>, Ni<2+>, the B one of univalent ions such as Li<+>, the C one of trivalent ions such as Al<3+>, Fe<3+>, M is one of pentavalent ions such as Nb<5+>, Ta<5+>, Sb<5+>, N one of quadrivalent ions such as Zr< 4+ >, Sn< 4+ >, Mn< 4+ >; the X is more than or equal to 0 and less than or equal to 0.25, the Y more than or equal to 0 and less than or equal to 0.5, the m more than or equal to 0 and less than or equal to 0.15, the n is more than or equal to 0 and less than or equal to 2. The microwave medium ceramics material by low-temperature sintering has the advantages of high dielectric constant, low dielectric loss, wide covering range of temperature coefficient of resonant frequency, low sintering temperature, simple preparation technique and adjustable temperature coefficient of resonantfrequency according to materials. The invention can be used for Low Temperature Co-fired Ceramics System (LTCC system) and used for producing microwave devices such as multi-media resonators, filters, etc.

Description

technical field

[0001] The invention belongs to the field of electronic ceramics and its preparation, in particular to a Ti-based microwave dielectric ceramic material sintered at low temperature and its preparation method. Background technique

[0002] With the development of mobile communication, portability requirements are put forward for the communication equipment system, and the whole system is moving towards integration, in order to obtain products with small size, light weight, high reliability and low cost. In the process of microwave circuit integration, the emergence of metal waveguides and microwave tubes has enabled microwave circuits to be integrated and miniaturized to a certain extent, but the bulky and bulky metal resonators traditionally used have made the integration of microstrip circuits difficult. Dielectric ceramics (microwave dielectric ceramics, MWDC) to make resonators has proposed a way out for this. Microwave dielectric ceramics used as dielectr...