Dielectric ceramic for high-frequency section and preparation method thereof

A technology of dielectric ceramics and high-frequency bands, applied in the field of dielectric ceramics and its preparation, can solve the problems of complex material composition, unstable amplification process, and dielectric constant value lower than 25, and achieve easy process amplification, good chemical stability, The effect of reducing the production cost

Inactive Publication Date: 2011-08-31
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the disadvantages in the prior art that contain zinc metatitanate phase, the composition of the material is complex, resulting in unstabl...

Method used

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  • Dielectric ceramic for high-frequency section and preparation method thereof
  • Dielectric ceramic for high-frequency section and preparation method thereof
  • Dielectric ceramic for high-frequency section and preparation method thereof

Examples

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Embodiment 1

[0019] In this example, a chemical method is used to obtain nano-zinc oxide and nano-magnesium oxide as starting materials for preparing a ceramic composition. The ratio of raw materials in this embodiment is: 1 part of zinc oxide, 0.92 part of nano anatase titanium dioxide, 0.08 part of tin dioxide, and 1.00 wt % of additives. Zinc oxide is produced by the decomposition of basic zinc carbonate. The additive is based on the total weight of the base material as 100.

[0020] The preparation process of this embodiment is:

[0021] In the first step, the raw material is heated to decompose it. Analytical pure basic zinc carbonate is heated to decompose it into zinc oxide. The heating temperature is 350° C., the holding time is 3 hours, and the heating rate is 5° C. / min. The particle diameter of the obtained zinc oxide is 50-80 nm.

[0022] The second step is to prepare calcined powder. Mix zinc oxide, nano-anatase titanium dioxide and tin dioxide in a ratio of 1 part zinc o...

Embodiment 2

[0030] In this example, a chemical method is used to obtain nano-zinc oxide and nano-magnesium oxide as starting materials for preparing a ceramic composition. The ratio of raw materials in this embodiment is: 0.7 parts of zinc oxide, 0.3 parts of magnesium oxide, 0.88 parts of nano-anatase titanium dioxide, 0.12 parts of tin dioxide, plus 1.10 weight percent additives. Among them, zinc oxide is generated by the decomposition of basic zinc carbonate, and magnesium oxide is generated by the decomposition of basic magnesium carbonate. The additive is based on the total weight of the base material as 100.

[0031] The preparation process of this embodiment is:

[0032] In the first step, the raw material is heated to decompose it. Heat analytically pure basic zinc carbonate and basic magnesium carbonate to decompose them into zinc oxide and magnesium oxide. The heating temperature is 350°C, the holding time is 3 hours, and the heating rate is 5°C / min. The diameter is 50-80nm; ...

Embodiment 3

[0041] In this example, a chemical method is used to obtain nano-zinc oxide and nano-magnesium oxide as starting materials for preparing a ceramic composition. The ratio of raw materials in this embodiment is: 0.2 part of zinc oxide, 0.8 part of magnesium oxide, 0.8 part of nano-anatase titanium dioxide, 0.2 part of tin dioxide, plus 1.20% by weight of additives. Among them, zinc oxide is generated by the decomposition of basic zinc carbonate, and magnesium oxide is generated by the decomposition of basic magnesium carbonate. The additive is based on the total weight of the base material as 100.

[0042] The preparation steps are:

[0043] In the first step, the raw material is heated to decompose it. The analytically pure basic zinc carbonate is heated to decompose it into zinc oxide, the heating temperature is 350°C, the holding time is 3 hours, the heating rate is 5°C / min, the particle size of the obtained zinc oxide is 50-80nm; the analytically pure The basic magnesium ...

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Abstract

The invention discloses dielectric ceramic for a high-frequency section and a preparation method thereof. The dielectric ceramic comprises basic zinc carbonate, nanoanatase titanium dioxide, basic magnesium carbonate, tin dioxide and additives, and specifically comprises the following raw materials in parts/percentage by weight: 1-x parts of generated zinc oxide, x parts of generated magnesium oxide, 1-y parts of nanoanatase titanium dioxide, y parts of tin dioxide and 1.0-2.0 percent of additives, wherein x is more than or equal to 0 and less than or equal to 0.8; y is more than or equal to 0.08 and less than or equal to 0.2; and the molar ratio of the additives is 3:1. The preparation method comprises the following steps of: heating the raw materials for decomposing; pre-burning; preparing mixed powder; molding; and sintering to obtain the dielectric ceramic for the high-frequency section. The dielectric ceramic for the high-frequency section is derived on the basis of doping and modification of a system, has high chemical stability, and is suitable for making a flaky element taking a sputtered metal such as silver, copper or silver/copper alloy and the like as an inner electrode. By adopting the dielectric ceramic, the manufacturing cost of the flaky element is effectively lowered.

Description

technical field [0001] The invention relates to the field of high-frequency dielectric ceramics in the subject of materials, and relates to a dielectric ceramic and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of mobile communications and satellite communications, there is a great demand for high-frequency dielectric ceramics as materials for high-frequency integrated circuits or dielectric resonators. [0003] There are many types of high-frequency dielectric ceramics, among which zinc metatitanate, magnesium metatitanate and their solid solution zinc-magnesium titanate ceramics have excellent high-frequency dielectric properties and can be sintered at low temperature. However, the phase structure of zinc metatitanate and magnesium metatitanate system dielectric ceramics is extremely sensitive to the preparation process, and the performance is very unstable after the scale-up process due to many influencing factors....

Claims

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Application Information

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IPC IPC(8): C04B35/453C04B35/04C04B35/622
Inventor 刘向春
Owner XIAN UNIV OF SCI & TECH
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