Low-temperature-sintered composite microwave dielectric ceramic material and preparation method thereof

A microwave dielectric ceramic and low-temperature sintering technology is applied in the field of composite microwave dielectric ceramic materials, low-temperature sintered composite microwave dielectric ceramic materials and their preparation, which can solve problems such as restricting applications and achieve the effect of low loss

Active Publication Date: 2017-04-26
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0005] The above literature reduces the BaTi 5 o 11 sintering temperature, but the sintering temperature of 925°C is still relatively high in the application of LTCC, which will limit its application in LTCC

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  • Low-temperature-sintered composite microwave dielectric ceramic material and preparation method thereof
  • Low-temperature-sintered composite microwave dielectric ceramic material and preparation method thereof
  • Low-temperature-sintered composite microwave dielectric ceramic material and preparation method thereof

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Embodiment Construction

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] The material of the present invention is composed of BaTi with a mass percentage of 92.5% to 97.5%. 5 o 11 Composition of base material and a fever reducer with a mass percentage of 1% to 7.5%, BaTi 5 o 11 The composition of the base material is BaTi 5 o 11 -nCuO, wherein: 0.005≤n≤0.020 weight ratio, fever reducer composition is 27.25%≤Ba 2 CO 3 ≤46.74%, 4.25%≤Li 2 CO 3 ≤7.47%, 8.65%≤SiO 2 ≤9.19%, 25.59%≤B 2 o 3 ≤38.29%, 20.88%≤ZnO≤32.95%, 1.58%≤Al 2 o 3 ≤9.83%, 0.29%≤MnCO 3 ≤0.95%.

[0022]Table 1 shows the data of several specific examples of the composition content of the present invention, and Table 2 shows the microwave dielectric properties of each example.

[0023] Its preparation method is:

[0024] Step 1, the BaCO 3 , CuO, TiO 2 Raw powder by BaTi 5 o 11 -nCuO composition ingredients, wherein: 0.00...

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Abstract

The invention belongs to the field of electronic ceramics and manufacturing thereof, and particularly relates to a low-temperature-sintered composite microwave dielectric ceramic material and a preparation method thereof. The low-temperature-sintered composite microwave dielectric ceramic material uses BaTi5O11-nCuO-xM as a base material, wherein according to a weight ratio, n is greater than or equal to 0.005 and is smaller than or equal to 0.020, M is a sintering improver, and x is greater than or equal to 0.010 and is smaller than or equal to 0.075; M specifically comprises the following components in percent by weight: greater than or equal to 27.25% and smaller than or equal to 46.74% of Ba2CO3, greater than or equal to 4.25% and smaller than or equal to 7.47% of Li2CO3, greater than or equal to 8.65% and smaller than or equal to 9.19% of SiO2, greater than or equal to 25.59% and smaller than or equal to 38.29% of B2O3, greater than or equal to 20.88% and smaller than or equal to 32.95% of ZnO, greater than or equal to 1.58% and smaller than or equal to 9.83% of Al2O3, and greater than or equal to 0.29% and smaller than or equal to 0.95% of MnCO3. The low-temperature-sintered composite microwave dielectric ceramic material provided by the invention has the sintering temperature of 875-920 DEG C, has a dense system, has the dielectric constant of 30-40, the loss greater than or equal to 10-4 and the Qxf (GHz) of 20000-30000, can be co-fired with silver well in an LTCC (low temperature co-fired ceramics) process, and can be easily produced industrially; the low-temperature-sintered composite microwave dielectric ceramic material can be widely applied to low-temperature high-dielectric constant microwave dielectric core materials in dielectric resonators, filters, oscillators and other microwave devices in satellite communication, and has an important industrial application value.

Description

technical field [0001] The invention belongs to the field of electronic ceramics and its manufacture, and relates to a composite microwave dielectric ceramic material, in particular to a low-temperature sintered composite microwave dielectric ceramic material and a preparation method thereof. Background technique [0002] Microwave dielectric ceramics refer to ceramics that are used as dielectric materials in microwave (300MHz to 300GHz) frequency band circuits and perform one or more functions. They are key basic materials in modern communication technology and are widely used in dielectric resonators and filters. , dielectric substrate, dielectric waveguide circuit, microwave capacitor, duplexer, antenna and other microwave components. [0003] Dielectric ceramics used in the microwave frequency band should meet the following requirements: (1) a suitable dielectric constant to facilitate the miniaturization of the device (the size of the dielectric component and the dielec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/64
CPCC04B35/4686C04B35/64C04B2235/3203C04B2235/3217C04B2235/3262C04B2235/3281C04B2235/3284C04B2235/3409C04B2235/3418C04B2235/656C04B2235/96
Inventor 李恩竹段舒心孙成礼张树人
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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