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Method for preparing microwave dielectric glass ceramics

A glass ceramic and microwave dielectric technology, applied in ceramics, inorganic insulators, etc., can solve the problems of difficult market-oriented production, small product batches, and large production costs, and achieve the effects of reliable parameters, convenient operation and control, and optimized raw material formula.

Inactive Publication Date: 2008-03-12
QINGDAO UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When products with multiple temperature coefficients are to be produced, multiple recipes are required. Sometimes, the batch size of a product with a certain temperature drift is small, and its preparation cost is too high to be suitable for market production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] According to the above implementation steps to produce a batch of drift temperature coefficient τ f The product with a value of 0 has the largest demand and requires a very stable operating frequency. The parameter range in the process can be taken as the lower limit, and the nuclear heat treatment time is 7 hours.

Embodiment 2

[0029] According to the above implementation steps to produce a batch of drift temperature coefficient τ f For products with a temperature coefficient of +5ppm / ℃, in order to compensate for the negative temperature characteristics of the overall circuit, sometimes the resonator needs to have positive temperature characteristics; the parameter range in the process takes the upper limit value, and the nucleation heat treatment time is 6.5 hours.

[0030] The product that above-mentioned two embodiments make measures its characteristic parameter value under 10GHz condition: Relative permittivity ε r is 14.8, and f×Q is 12800GHz.

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Abstract

The present invention relates to a preparation technique technology for glass ceramic materials, in particular to a preparation method for microwave dielectric glass ceramics in which the temperature feature of the materials can be effectively controlled. The preparation method comprises the steps such as raw material preparation, material mixing, glass melting, nuclearization heat treatment, crystallization treatment, etc. The same formula is adopted for products of different temperature drift parameters and the processes before the melting in the process of preparation are the same and the time for applying the heat treatment to products of different temperature drifts is different. The nucleation time of the glass ceramic is utilized to control the positive-negative of the dielectric constant and the magnitude of the temperature coefficient and change the temperature drift of the glass ceramic. Comparing the present invention with the prior art, the formula of the raw materials is optimized, the preparation technique is simple, the operation and control are convenient, the parameters of the prepared glass ceramics products are reliable and the glass ceramics can be widely applied in multiple fields of microwave dielectric materials.

Description

Technical field: [0001] The invention relates to the technical field of preparation technology of glass ceramic materials, in particular to a preparation method of microwave dielectric glass ceramics which can effectively control the temperature characteristics of materials during heat treatment. Background technique: [0002] Although glass-ceramic has been widely used in various dielectric materials, it is not an ideal microwave dielectric material, and its three indicators reflecting the dielectric properties are not ideal. First of all, the dielectric constant is not large, generally not more than 10. Secondly, the dielectric loss is too large, and the Q value is only 200-500. Another important point is that the temperature coefficient of the dielectric constant is very high and unstable. Therefore, there are not many practical glass ceramics as microwave dielectric materials, and they are still in the stage of discussion and research. More research is on glass-cerami...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/00C03B32/02H01B3/12
Inventor 戚凭何丽珠戴培赟
Owner QINGDAO UNIV
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