Porous glass ceramic material, preparation method and prepared metamaterial substrate
A technology of porous glass ceramics and substrates, which can be applied to electrical components, antennas, etc., can solve problems such as limited effects, and achieve the effects of low dielectric constant, low loss, and wide application.
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[0037] Example one
[0038] 74.5% SiO by weight 2 , 13.6%H 3 BO 3 , 7.4% (NH 4 )H 2 PO 4 Mix with 4.5% ZnO raw material and add ethanol, use alumina ball as the ball mill, ball mill in a planetary ball mill for 4 hours, then dry at 80°C for 12 hours, and pre-burn the dried powder at 400°C for 2 hours;
[0039] Add 15.5%wt of stearic acid pore-forming agent and 5.2%wt of polyvinyl alcohol binder to the pre-fired powder for secondary ball milling, spray drying, and pass through a 60 mesh sieve to granulate. The granulated powder The material is subjected to two-way compression molding under 120MPa pressure; after compression molding, it is slowly heated to 500℃ at a rate of 1℃ / min in a high-temperature electric furnace, and kept for 2 hours to ensure that the polyvinyl alcohol binder and stearic acid pore former are completely eliminated. After that, the temperature is increased rapidly at 10°C / min to the maximum firing temperature of 950°C, and kept for 3 hours, then the temperature...
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[0041] Example two
[0042] 74.5% SiO by weight 2 , 13.6%H 3 BO 3 , 11.9% (NH 4 )H 2 PO 4 Mix with 0% ZnO raw material and add ethanol, use alumina ball as a ball mill, mill it in a planetary ball mill for 4 hours, then dry it at 80°C for 12 hours, and pre-burn the dried powder at 400°C for 2 hours;
[0043] The pre-fired powder is added with 10.5%wt stearic acid pore former and 5.2%wt polyvinyl alcohol binder for secondary ball milling, spray-dried through a 60 mesh sieve to granulate, and the granulated powder The material is subjected to two-way compression molding under 120MPa pressure; after compression molding, it is slowly heated to 500℃ at a rate of 1℃ / min in a high-temperature electric furnace, and kept for 2 hours to ensure that the polyvinyl alcohol binder and stearic acid pore former are completely eliminated. After that, the temperature is increased rapidly at 10°C / min to the highest firing temperature of 950°C, and kept for 2 hours, then the temperature is reduced to ...
Example Embodiment
[0045] Example three
[0046] 74.5% SiO by weight 2 , 13.6%H 3 BO 3 , 2.1% (NH 4 )H 2 PO 4 Mix with 9.8% ZnO raw material and add ethanol, use alumina ball as the ball mill, ball mill in a planetary ball mill for 4 hours, then dry at 80°C for 12 hours, and pre-burn the dried powder at 400°C for 2 hours;
[0047] Add 12.5%wt stearic acid pore-forming agent and 5.2%wt polyvinyl alcohol binder to the pre-fired powder for secondary ball milling, spray drying, and pass through a 60 mesh sieve to granulate. The granulated powder The material is subjected to two-way compression molding under 120MPa pressure; after compression molding, it is slowly heated to 500℃ at a rate of 1℃ / min in a high-temperature electric furnace, and kept for 2 hours to ensure that the polyvinyl alcohol binder and stearic acid pore former are completely eliminated. Then, the temperature was increased rapidly at 10°C / min to the highest firing temperature of 950°C, and kept for 4 hours, then the temperature was lowe...
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