Temperature frequency characteristic regulator of microwave medium ceramic and LTCC material thereof

Abstract

The invention discloses a microwave dielectric ceramic, a temperature frequency characteristic regulator of the microwave medium ceramic and an LTCC material thereof. The microwave dielectric ceramic comprises a principal crystalline phase. The chemical formula of the principal crystalline phase is BaSixO2(x+1)(x is greater than or equal to 1.56 but less than or equal to 1.85). The ceramic has a low dielectric constant (epsilon r is equal to 7.1-7.9), a relatively high quality factor (Q*f is equal to 10973-20350GHz) and a relatively wide sintering temperature (750-1250 DEG C). Meanwhile, the principle crystalline phase which is sintered in a reductive atmosphere N2-1vol%H2 still has an excellent microwave dielectric property and is the microwave dielectric material with good reduction resistance. The microwave dielectric material can be used as the temperature frequency characteristic regulator of the microwave medium ceramic and can keep a stable phase structure and a good microwave dielectric property (reduction resistance) in the reductive atmosphere. Compared with a conventional adjustor, the microwave dielectric ceramic has an obvious advantage and is a novel temperature frequency characteristic regulator which can be applied to BME-MLCC.

Description

technical field

[0001] The invention belongs to the technical field of microwave dielectric ceramics, and more specifically relates to a microwave dielectric ceramic and can be used as an anti-reduction microwave ceramic temperature-frequency characteristic regulator and an LTCC material modified by the same. Background technique

[0002] Microwave dielectric ceramics refer to ceramic materials used as dielectric materials in microwave frequency band (300MHz ~ 30GHz) circuits. As the operating frequency of communication equipment continues to increase, the signal delay phenomenon will become more obvious, the system loss and heat will also increase, and the system stability will gradually deteriorate. The low dielectric constant can reduce the interaction coupling loss between the material and the electrode, and increase the transmission rate of electrical signals. Therefore, research on microwave dielectric ceramics with low dielectric constant is particularly important. ...

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