Dielectric ceramic material and preparation method thereof
Inactive Publication Date: 2018-12-18
上海金赞陶瓷材料有限公司
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The sintering temperature of the existing microwave dielectric materials is relatively high, generally above 1500°C, which is much higher than the melting temperature of the conductive paste, and the existing technology is to add glass such as boron oxide
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[0019] The preparation method of the above-mentioned dielectric ceramic material comprises the following steps: (a) stirring and mixing the aluminum oxide, zinc oxide, calcium oxide, tungsten oxide and magnesium oxide in the formula amount, pulverizing to nanometer level, drying and granulating;
[0020] (b) pre-calcining the product of step (a) at 900-1100° C., crushing to nano-scale, drying and granulating;
[0021] (c) Pressing the product of step (b) into shape, and sintering at 1200-1350°C for 4-8 hours.
[0022] Preferred embodiment of the present invention will be described in detail below:
Embodiment 1
[0024] This embodiment provides a dielectric ceramic material, which contains the following components: 300g of aluminum oxide, 200g of zinc oxide, 350g of calcium oxide, 100g of tungsten oxide, and 50g of magnesium oxide; the preparation method is as follows:
[0025] (a) Stir and mix the aluminum oxide, zinc oxide, calcium oxide, tungsten oxide and magnesium oxide in the formula quantity, pulverize to the nanometer level (you can also pulverize each and mix uniformly, adopt the Chinese utility model whose application number is 201721295493.1 equipment; or a commercially available horizontal sand mill), sampling and testing to ensure that the product is within the nanometer size range (if the test fails, the above operations can be repeated); granulate after drying at 120 ° C;
[0026] (b) pre-calcining the product of step (a) at 900-1100° C., crushing to nano-scale, drying and granulating;
[0027] (c) Pressing the product of step (b) into shape, and sintering at 1200-1350°C...
Embodiment 2
[0029] This embodiment provides a dielectric ceramic material, which is basically the same as that in Embodiment 1, except that it contains the following components: 400 g of aluminum oxide, 180 g of zinc oxide, 270 g of calcium oxide, 120 g of tungsten oxide, and magnesium oxide 30g.
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Abstract
The invention relates to a dielectric ceramic material and a preparation method thereof. The dielectric ceramic material is prepared fromcomprises the following ingredients in percentage by mass: 30 to 40 percent of aluminum oxide, 15 to 20 percent of zinc oxide, 25 to 35 percent of calcium oxide, 10 to 15 percent of tungsten oxide and 2 to 6 percent of magnesium oxide. The specific content of aluminum oxide, zinc oxide, calcium oxide, tungsten oxide and magnesium oxide are used for compounding and mixing; high-temperature sintering is performed, so that the sintering temperature of the dielectric ceramic material can be lowered; in addition, the dielectric ceramic material has the smaller dielectric constant (about 9.6) and higher Q*f value.
Description
technical field [0001] The invention belongs to the field of ceramic materials, and in particular relates to a dielectric ceramic material and a preparation method thereof. Background technique [0002] Digital microwave communication is a kind of multi-channel digital communication system based on time-division multiplexing technology, which can be used to transmit telephone signals, and can also be used to transmit data signals and image signals. Corresponding to digital microwave communication is its predecessor - analog microwave communication, which is a type of multiplex communication system based on frequency division multiplexing technology, mainly used to transmit telephone signals and pictures, video TV and GPS signals, etc. Early digital microwave communication refers specifically to digital microwave relay communication, that is, a wireless communication method that uses line-of-sight and relay methods to transmit digital information in the microwave frequency ba...
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