Preparation method and application of low-dielectric loss piezoelectric ceramic materials
一种压电陶瓷、低介电的技术,应用在压电/电致伸缩/磁致伸缩器件、电路、电气元件等方向,能够解决机械强度不够、压电性能衰减、非线性等问题,达到介电损耗低、使用性能提高、好应用前景的效果
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Embodiment 1
[0020] (1) Mix 50 parts of silicon nitride, 25 parts of alumina, and 10 parts of molybdenum disulfide, put them into a ball mill and mill them for 3 hours at a speed of 220 r / min to obtain a ball mill mixture;
[0021] (2) Put the ball mill mixture in ethylene glycol, then add 12 parts of bisphenol A epoxy resin, 8 parts of strontium zirconate, and 3 parts of polyether propylene oxide, heat to 150 °C while stirring, and keep for 30 min , to obtain heat reaction mixture;
[0022] (3) Aging the thermal reaction mixture at room temperature for 12 h, adjusting the pH to 8.0 with 3 mol / L sodium hydroxide solution, and then drying at 80 °C for 8 h to obtain a ceramic slurry;
[0023] (4) Add the ceramic slurry into the mold for 60 minutes of solidification treatment at 250°C and 15MPa, and then demould to obtain the billet, and then send the billet into the sintering furnace for pre-sintering, the pre-sintering temperature is 950°C, and pre-sintering The time is 1.5 h, and then the...
Embodiment 2
[0026] (1) Mix 55 parts of silicon nitride, 30 parts of alumina, and 15 parts of molybdenum disulfide, put them into a ball mill and mill them for 3 h at a speed of 235 r / min to obtain a ball mill mixture;
[0027] (2) Put the ball mill mixture in ethylene glycol, then add 15 parts of bisphenol A epoxy resin, 10 parts of strontium zirconate, and 4 parts of polyether propylene oxide, heat to 150 °C while stirring, and keep for 30 min , to obtain heat reaction mixture;
[0028] (3) Aging the thermal reaction mixture at room temperature for 12 h, adjusting the pH to 8.0 with 3 mol / L sodium hydroxide solution, and then drying at 80 °C for 8 h to obtain a ceramic slurry;
[0029] (4) Add the ceramic slurry into the mold for 70 minutes of solidification treatment at 250°C and 15MPa, and then demould to obtain the billet, and then send the billet to the sintering furnace for pre-sintering, the pre-sintering temperature is 950°C, pre-sintering The time is 1.5 h, and then the pre-fire...
Embodiment 3
[0032] (1) Mix 60 parts of silicon nitride, 35 parts of alumina, and 20 parts of molybdenum disulfide, put them into a ball mill and mill them for 3 hours at a speed of 220-250 r / min to obtain a ball mill mixture;
[0033] (2) Put the ball mill mixture in ethylene glycol, then add 18 parts of bisphenol A epoxy resin, 12 parts of strontium zirconate, and 5 parts of polyether propylene oxide, heat to 150 ° C while stirring, and keep for 30 min , to obtain heat reaction mixture;
[0034] (3) Aging the thermal reaction mixture at room temperature for 12 h, adjusting the pH to 8.0 with 3 mol / L sodium hydroxide solution, and then drying at 80 °C for 8 h to obtain a ceramic slurry;
[0035] (4) Add the ceramic slurry into the mold and perform curing treatment at 250°C and 15MPa for 80 minutes, then demould to obtain the billet, and then send the billet into the sintering furnace for pre-sintering at 950°C, pre-sintering The time is 1.5 h, and then the pre-fired blank is sintered at ...
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