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Medium-temperature sintered composite niobate high-frequency medium ceramic and preparation method thereof

A high-frequency dielectric, niobate technology, applied in ceramics, inorganic insulators, etc., can solve the problems of unadjustable temperature coefficient and dielectric constant to be further improved, and achieve low dielectric loss, no pollution in the process, and broad application prospects. Effect

Inactive Publication Date: 2013-02-27
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The disadvantage of the existing technology is that the dielectric constant needs to be further improved, and the temperature coefficient cannot be adjusted

Method used

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  • Medium-temperature sintered composite niobate high-frequency medium ceramic and preparation method thereof
  • Medium-temperature sintered composite niobate high-frequency medium ceramic and preparation method thereof
  • Medium-temperature sintered composite niobate high-frequency medium ceramic and preparation method thereof

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with embodiment.

[0020] The present invention adopts chemical raw materials ZnO and Nb with a purity greater than 99.9% 2 o 5 and TiO 2 , carry out batching and mixing according to the formula, add in the nylon ball mill jar according to the ratio of mixed raw materials: deionized water: zirconium ball mass ratio of 1: 1.6: 1.6, and ball mill on a planetary ball mill at a speed of 400r / min for 2 to 6 hours ;Dried in a 1500W infrared drying oven at 80-120°C, pre-fired at 900°C for 3 hours to obtain a frit (precursor); add paraffin wax as a binder to the frit for granulation, and sieve , and then use a powder tablet press to press a green body at a pressure of 260MPa, and sinter the green body at 1020-1170°C for 1.5-6 hours to obtain a high-frequency dielectric ceramic.

[0021] See Table 1 for details of the raw material composition relationship of specific embodiments of the present invention.

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Abstract

The invention relates to medium-temperature sintered composite niobate high-frequency medium ceramic. The raw material components of the middle-temperature sintered composite niobate high-frequency medium ceramic and the mole percentage content can be expressed by (1-x)ZnTiNb2O8-x titanium dioxide (TiO2), wherein x is more than or equal to 0 and less than or equal to 0.85. A preparation method comprises the steps of mixing the materials, performing ball milling, calcining at the temperature of 920 DEG C, synthesizing a precursor, pelleting, forming and sintering at the temperature of between 1,020 and 1,170 DEG C for 1.5 to 6 hours. The high-frequency medium ceramic is produced by compounding ZnTiNb2O8 and TiO2 two-phase ceramic, wherein the dielectric constant is 34 to 97; the dielectric loss is 0.02 to 0.57*10<-4>; and the capacitance temperature coefficient is 89 to -375*10<-6> / DEG C. The high-frequency medium ceramic and the preparation method thereof have the advantages of a serialized dielectric constant, super-low dielectric loss, adjustable capacitance temperature coefficient, simple process, pollution-free production process, medium-temperature sintering and wide application prospect.

Description

technical field [0001] The invention relates to the field of electronic information materials and components, in particular to a medium-temperature sintered high-frequency dielectric ceramic and a preparation method thereof. Background technique [0002] With the rapid development of modern communication and electronic technology, the demand for high-frequency dielectric ceramic materials and components is increasing, and the requirements are getting higher and higher. At present, the research and development of high-frequency dielectric ceramic materials are mainly carried out in the following aspects: ① Pursuit of the limit of low loss; ② Exploration of higher relative permittivity or serialization of permittivity; ③ Pursuit of near-zero or adjustable temperature coefficient. [0003] With the continuous development of electronic ceramic materials, in order to meet different applications, various new system materials with excellent performance are also emerging. Niobium / ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/495C04B35/622H01B3/12
Inventor 李玲霞廖擎玮张平王洪茹张威
Owner TIANJIN UNIV
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