High frequency porcelain with low dielectric constant and preparation method

A technology of low dielectric constant and ceramic material, applied in the field of high frequency and low dielectric constant ceramic material and its preparation, can solve the problems of high sintering temperature, large loss of ceramic material, unsuitable production, etc. Effect of sintering temperature

Inactive Publication Date: 2005-01-12
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] (1) Talc porcelain and alumina porcelain: the advantage is that it has high mechanical strength, and the dielectric constant is as small as 6, but the disadvantage is that the sintering temperature is high, which brings great difficulties in the process
[0007] (2) Glass-ceramic system: Porcelain with a relatively small dielectric constant can be obtained. However, on the one hand, because the preparation process of glass-ceramic is difficult to control, it is not suitable for large-scale production; Sometimes it also contains more glass phase, which makes the loss of ceramic material larger, and is not suitable for making MLC

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Mg 2 TiO 4 : 58g, Mg 2 SiO 4 : 15g, ball milled for 220 minutes after mixing, and synthesized at 800°C for 200 minutes to form a frit. Glass: 25g, Co 2 o 3 : 2g, added to the above-mentioned frit, ball milled for 320 minutes, then added 6g of paraffin wax to granulate, weighed 0.45g for each piece, pressed into tablets, and finally sintered: the sintering system was: after 200 minutes, the temperature was raised to 550°C, and then The temperature was raised to 1160° C. over 50 minutes and kept for 100 minutes.

Embodiment 2

[0033] Mg 2 TiO 4 : 68g, Mg 2 SiO 4 : 19g, ball milled for 260 minutes after mixing, and synthesized at 1100°C for 240 minutes to form a frit. Glass: 10g, Co 2 o 3 : 3g, added to the above-mentioned frit, ball milled for 380 minutes, then added 7g of polyvinyl alcohol to granulate, weighed 0.55g for each piece, pressed into tablets, and finally sintered: the sintering system was: heated to 550°C in 240 minutes, After 70 minutes, the temperature was raised to 1360° C., and the temperature was maintained for 120 minutes.

Embodiment 3

[0035] Mg 2 TiO 4 : 60g, Mg 2 SiO 4 : 20g, ball milled for 240 minutes after mixing, and synthesized at 1000°C for 220 minutes to form a frit. Glass: 17g, Co 2 o 3 : 3g, added to the above frit, ball milled for 360 minutes, then added 6g of paraffin wax to granulate, weighed 0.50g for each tablet, and finally sintered: the sintering system was: after 220 minutes, the temperature was raised to 550°C, and then The temperature was raised to 1260° C. over 60 minutes and kept for 110 minutes.

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Abstract

The invention provides a kind of high-frequency low-dielectric constant porcelain with good dielectrical performance and prodn. method. It is composed by following compound according to weight percentage ratio: Mg2TiO4 58-68, Mg2SiO4 10-20, glass 10-25, CO2O3 0.2-4.2. By the invention, firing temp. of system can be reduced effectively to about 1200 deg.C. Said porcelain has smaller dielectric constant, sigma<12 minus or plus 1, less system loss tg delta< 1X10 to the power -4 (1MH2), higher insulation resistivity Pv>10 to the power 3 omega.cm, temp. coefficient of electric capacity Uc<(100 minus or plus 20) ppm/deg.C.

Description

technical field [0001] The invention relates to the field of electronic materials, and more specifically relates to a high-frequency low-dielectric constant ceramic material and a preparation method thereof. Background technique [0002] With the development and application of high-frequency radio wave resources and the rapid development of microwave, mobile communication, and satellite communication, higher requirements are put forward for the miniaturization, high performance, and low cost of microwave devices. The development of monolithic capacitors depends on the development of materials (including dielectric materials, electrode pastes, adhesives, etc.) It has important application value. Therefore, in the experimental research of high-frequency dielectric ceramic capacitors, how to improve the Q value has become an important content in determining the high-frequency dielectric properties of capacitors. [0003] Among them, the low-die...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/462C04B35/465C04B35/622
Inventor 吴霞宛李玲霞林曼红
Owner TIANJIN UNIV
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