CN113773060A - 一种高q值陶瓷材料及其制备方法和应用 - Google Patents
一种高q值陶瓷材料及其制备方法和应用 Download PDFInfo
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- 229910010293 ceramic material Inorganic materials 0.000 title claims abstract description 58
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 71
- 239000000843 powder Substances 0.000 claims abstract description 56
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 53
- 229910001845 yogo sapphire Inorganic materials 0.000 claims abstract description 53
- 229910002974 CaO–SiO2 Inorganic materials 0.000 claims abstract description 28
- 239000000919 ceramic Substances 0.000 claims abstract description 16
- 238000000498 ball milling Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 239000002245 particle Substances 0.000 claims description 13
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 claims description 12
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 6
- 238000001354 calcination Methods 0.000 claims description 6
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 6
- 239000000920 calcium hydroxide Substances 0.000 claims description 6
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 6
- 238000000151 deposition Methods 0.000 claims description 6
- 238000002309 gasification Methods 0.000 claims description 6
- 229910052681 coesite Inorganic materials 0.000 claims description 5
- 229910052906 cristobalite Inorganic materials 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 229910052682 stishovite Inorganic materials 0.000 claims description 5
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- 238000001878 scanning electron micrograph Methods 0.000 description 2
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- 239000004925 Acrylic resin Substances 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
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- 230000003595 spectral effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
本发明公开了一种高Q值陶瓷材料及其制备方法和应用。本发明的高Q值陶瓷材料的组成包括MgO‑CaO‑SiO2包覆改性Al2O3粉末和Y2O3包覆改性Al2O3粉末,其制备方法包括以下步骤:1)制备MgO‑CaO‑SiO2包覆改性Al2O3粉末;2)MgO‑CaO‑SiO2包覆改性Al2O3粉末和Y2O3包覆改性Al2O3粉末的混合球磨。本发明通过改进氧化铝陶瓷材料的组成和调控助烧成分的分布,有效避免了助烧成分不均匀引起的晶粒聚集长大为异常晶粒的问题,晶粒更加细密均匀,得到的氧化铝陶瓷材料具有更高的Q值和更低的介电损耗,更加适合用于制备射频绕线器件中的瓷芯。
Description
技术领域
本发明涉及陶瓷材料技术领域,具体涉及一种高Q值陶瓷材料及其制备方法和应用。
背景技术
随着现代通信系统中的射频系统向低功耗、高效率和小体积的方向发展,无线通讯技术也朝着大容量、多电平、多载波方向飞速发展,宽带数字传输技术和高频谱效率的调制方式得到越来越广泛的应用,同时对射频系统的性能也提出了更为苛刻的要求,而作为阻抗匹配和滤波用途的绕线型陶瓷电感也向着高Q值的方向发展。
为了满足绕线型陶瓷电感的性能要求,并同时实现小型化,目前绕线型陶瓷电感中主要采用的是氧化铝瓷芯。然而,现有的氧化铝瓷芯虽然频率特性可以满足应用要求,但高频下的介电损耗大,易导致射频电路性能劣化。此外,由于氧化铝瓷芯主要是由氧化铝粉末和助烧组分通过机械混合、成型和烧结制成,且通常是通过增加瓷体密度的方式来提高Q值和减少介电损耗,而助烧成分容易引起偏聚现象,导致晶粒聚集长大成为异常晶粒,最终导致氧化铝瓷芯的性能劣化。综上可知,现有的氧化铝瓷芯难以完全满足实际应用需求,亟需开发性能更加优异的氧化铝陶瓷材料和氧化铝瓷芯。
以上陈述仅仅是提供与本发明有关的背景信息,而不必然构成现有技术。
发明内容
本发明的目的之一在于克服现有氧化铝陶瓷材料所存在的缺陷,提供一种高Q值、低介电损耗的氧化铝陶瓷材料。
本发明的目的之二在于提供一种上述氧化铝陶瓷材料的制备方法。
本发明的目的之三在于提供一种上述氧化铝陶瓷材料的应用。
本发明所采取的技术方案是:
一种高Q值陶瓷材料,其组成包括MgO-CaO-SiO2包覆改性Al2O3粉末和Y2O3包覆改性Al2O3粉末,MgO-CaO-SiO2包覆改性Al2O3粉末的组成由内至外依次为Al2O3内核、MgO层、CaO层和SiO2层。
优选的,所述MgO-CaO-SiO2包覆改性Al2O3粉末、Y2O3包覆改性Al2O3粉末的质量比为1:0.05~1:0.10。
优选的,所述MgO-CaO-SiO2包覆改性Al2O3粉末中MgO的质量百分含量为1%~3%,CaO的质量百分含量为1%~2%,SiO2的质量百分含量为1%~2%。
优选的,所述MgO-CaO-SiO2包覆改性Al2O3粉末的平均粒径为0.3μm~0.6μm,且最大粒径≤1.2μm。
优选的,所述Y2O3包覆改性Al2O3粉末中Y2O3的质量百分含量为0.1%~0.3%。
优选的,所述Y2O3包覆改性Al2O3粉末的平均粒径为0.3μm~0.6μm。
上述高Q值陶瓷材料的制备方法包括以下步骤:
1)将Al2O3粉末加入流化床,再在3个不同的气化室内使硝酸镁、氢氧化钙和正硅酸乙酯气化后用空气依次带入流化床,在Al2O3粉末表面依次沉积MgO层、CaO层和SiO2层,得到MgO-CaO-SiO2包覆改性Al2O3粉末;
2)将MgO-CaO-SiO2包覆改性Al2O3粉末煅烧后进行破碎,再与Y2O3包覆改性Al2O3粉末混合后进行球磨,即得高Q值陶瓷材料。
优选的,步骤2)所述煅烧在900℃~1100℃下进行,煅烧时间为1h~3h。
优选的,步骤2)所述球磨的时间为1h~3h。
一种陶瓷部件,其由上述高Q值陶瓷材料制成。
一种瓷芯,其由上述高Q值陶瓷材料制成。
本发明的有益效果是:本发明通过改进氧化铝陶瓷材料的组成和调控助烧成分的分布,有效避免了助烧成分不均匀引起的晶粒聚集长大为异常晶粒的问题,晶粒更加细密均匀,得到的氧化铝陶瓷材料具有更高的Q值和更低的介电损耗,更加适合用于制备射频绕线器件中的瓷芯。
附图说明
图1为实施例1的高Q值陶瓷材料的SEM图。
图2为对比例1的陶瓷材料的SEM图。
具体实施方式
下面结合具体实施例对本发明作进一步的解释和说明。
实施例1:
一种高Q值陶瓷材料,其制备方法包括以下步骤:
1)将平均粒径0.6μm、最大粒径<1.2μm的Al2O3粉末加入流化床,再在3个不同的气化室内使硝酸镁、氢氧化钙和正硅酸乙酯气化后用空气依次带入流化床,在Al2O3粉末表面依次沉积MgO层、CaO层和SiO2层,得到MgO-CaO-SiO2包覆改性Al2O3粉末(MgO的质量百分含量为3%,CaO的质量百分含量为2%,SiO2的质量百分含量为2%);
2)将MgO-CaO-SiO2包覆改性Al2O3粉末置于1100℃下处理1h后进行破碎,再将MgO-CaO-SiO2包覆改性Al2O3粉末和Y2O3包覆改性Al2O3粉末(Y2O3的质量百分含量为0.3%,平均粒径为0.6μm)按照质量比1:0.1混合后球磨2h,干燥,即得高Q值陶瓷材料。
瓷环和瓷片的制备:
将本实施例的高Q值陶瓷材料和水性丙烯酸树脂按照质量比1:0.02混合,再在喷雾塔内喷雾造粒,制得粒径35μm~150μm的颗粒,再在200MPa的压力下成型得到瓷环坯体和瓷片坯体,瓷环坯体的外径为14.6mm,内径为9mm,高度为3.5mm,瓷片坯体(饼状)的直径为16mm,高度为2mm,再在空气气氛中1400℃处理3h,即得瓷环和瓷片。
实施例2:
一种高Q值陶瓷材料,其制备方法包括以下步骤:
1)将平均粒径0.3μm、最大粒径<1.2μm的Al2O3粉末加入流化床,再在3个不同的气化室内使硝酸镁、氢氧化钙和正硅酸乙酯气化后用空气依次带入流化床,在Al2O3粉末表面依次沉积MgO层、CaO层和SiO2层,得到MgO-CaO-SiO2包覆改性Al2O3粉末(MgO的质量百分含量为2%,CaO的质量百分含量为1%,SiO2的质量百分含量为1%);
2)将MgO-CaO-SiO2包覆改性Al2O3粉末置于900℃下处理3h后进行破碎,再将MgO-CaO-SiO2包覆改性Al2O3粉末和Y2O3包覆改性Al2O3粉末(Y2O3的质量百分含量为0.1%,平均粒径为0.3μm)按照质量比1:0.05混合后球磨2h,干燥,即得高Q值陶瓷材料。
瓷环和瓷片的制备:
参照实施例1的方法制备瓷环和瓷片。
实施例3:
一种高Q值陶瓷材料,其制备方法包括以下步骤:
1)将平均粒径0.45μm、最大粒径<1.2μm的Al2O3粉末加入流化床,再在3个不同的气化室内使硝酸镁、氢氧化钙和正硅酸乙酯气化后用空气依次带入流化床,在Al2O3粉末表面依次沉积MgO层、CaO层和SiO2层,得到MgO-CaO-SiO2包覆改性Al2O3粉末(MgO的质量百分含量为2.5%,CaO的质量百分含量为1.5%,SiO2的质量百分含量为1.5%);
2)将MgO-CaO-SiO2包覆改性Al2O3粉末置于1000℃下处理2h后进行破碎,再将MgO-CaO-SiO2包覆改性Al2O3粉末和Y2O3包覆改性Al2O3粉末(Y2O3的质量百分含量为0.15%,平均粒径为0.45μm)按照质量比1:0.08混合后球磨2h,干燥,即得高Q值陶瓷材料。
瓷环和瓷片的制备:
参照实施例1的方法制备瓷环和瓷片。
实施例4:
一种高Q值陶瓷材料,其制备方法包括以下步骤:
1)将平均粒径0.5μm、最大粒径<1.2μm的Al2O3粉末加入流化床,再在3个不同的气化室内使硝酸镁、氢氧化钙和正硅酸乙酯气化后用空气依次带入流化床,在Al2O3粉末表面依次沉积MgO层、CaO层和SiO2层,得到MgO-CaO-SiO2包覆改性Al2O3粉末(MgO的质量百分含量为1.5%,CaO的质量百分含量为1.6%,SiO2的质量百分含量为1.2%);
2)将MgO-CaO-SiO2包覆改性Al2O3粉末置于1000℃下处理2h后进行破碎,再将MgO-CaO-SiO2包覆改性Al2O3粉末和Y2O3包覆改性Al2O3粉末(Y2O3的质量百分含量为0.18%,平均粒径为0.5μm)按照质量比1:0.08混合后球磨2h,干燥,即得高Q值陶瓷材料。
瓷环和瓷片的制备:
参照实施例1的方法制备瓷环和瓷片。
对比例1:
一种陶瓷材料,其制备方法包括以下步骤:
将95质量份的Al2O3、2.4质量份的MgO、1.5质量份的CaO和1.1质量份的SiO2混合加入球磨机,球磨5h,再120℃干燥8h,即得陶瓷材料。
瓷环和瓷片的制备:
参照实施例1的方法制备瓷环和瓷片。
对比例2:
一种陶瓷材料,其制备方法包括以下步骤:
将95质量份的Al2O3、2.5质量份的MgO和2.5质量份的Y2O3混合加入球磨机,球磨5h,再120℃干燥8h,即得陶瓷材料。
瓷环和瓷片的制备:
参照实施例1的方法制备瓷环和瓷片。
性能测试:
1)实施例1的高Q值陶瓷材料和对比例1的陶瓷材料的扫描电镜(SEM)图依次如图1和图2所示。
由图1和图2可知:实施例1的高Q值陶瓷材料与对比例1的陶瓷材料相比,晶粒更加细密均匀,充分说明实施例1通过改进氧化铝陶瓷材料的组成和调控助烧成分的分布,有效避免了助烧成分不均匀引起的晶粒聚集长大为异常晶粒的问题。
此外,采用同样的方法对实施例2~4的高Q值陶瓷材料的微观形貌进行测试,测试发现:实施例2~4的高Q值陶瓷材料的晶粒同样细密均匀,微观形貌与实施例1的高Q值陶瓷材料十分接近。
2)对实施例1~4和对比例1~2中的瓷环和瓷片进行性能测试,测试结果如下表所示:
表1瓷环和瓷片的性能测试结果
测试项目 | 实施例1 | 实施例2 | 实施例3 | 实施例4 | 对比例1 | 对比例2 |
Q值 | 314 | 325 | 319 | 318 | 270 | 285 |
tanδ | 8.9×10<sup>-5</sup> | 8.6×10<sup>-5</sup> | 9.2×10<sup>-5</sup> | 9.2×10<sup>-5</sup> | 9.8×10<sup>-4</sup> | 9.5×10<sup>-4</sup> |
密度(g/cm<sup>3</sup>) | 3.91 | 3.81 | 3.83 | 3.86 | 3.65 | 3.72 |
注:
Q值:测试对象是瓷环,使用阻抗分析仪E4991进行测试,测试频率为100MHz;
tanδ(介电损耗角正切):测试对象是瓷片,使用网络分析仪E5071进行测试,测试频率为10GHz;
密度:测试对象是瓷片。
由表1可知:本发明通过改进氧化铝陶瓷材料的组成和调控助烧成分的分布,制备得到的陶瓷材料的Q值增大、介电损耗大幅下降,在实际的射频电路应用中更具优势。
上述实施例为本发明较佳的实施方式,但本发明的实施方式并不受上述实施例的限制,其他的任何未背离本发明的精神实质与原理下所作的改变、修饰、替代、组合、简化,均应为等效的置换方式,都包含在本发明的保护范围之内。
Claims (10)
1.一种高Q值陶瓷材料,其特征在于:所述高Q值陶瓷材料的组成包括MgO-CaO-SiO2包覆改性Al2O3粉末和Y2O3包覆改性Al2O3粉末;所述MgO-CaO-SiO2包覆改性Al2O3粉末的组成由内至外依次为Al2O3内核、MgO层、CaO层和SiO2层。
2.根据权利要求1所述的高Q值陶瓷材料,其特征在于:所述MgO-CaO-SiO2包覆改性Al2O3粉末、Y2O3包覆改性Al2O3粉末的质量比为1:0.05~1:0.10。
3.根据权利要求1或2所述的高Q值陶瓷材料,其特征在于:所述MgO-CaO-SiO2包覆改性Al2O3粉末中MgO的质量百分含量为1%~3%,CaO的质量百分含量为1%~2%,SiO2的质量百分含量为1%~2%。
4.根据权利要求1或2所述的高Q值陶瓷材料,其特征在于:所述MgO-CaO-SiO2包覆改性Al2O3粉末的平均粒径为0.3μm~0.6μm,且最大粒径≤1.2μm。
5.根据权利要求1或2所述的高Q值陶瓷材料,其特征在于:所述Y2O3包覆改性Al2O3粉末中Y2O3的质量百分含量为0.1%~0.3%。
6.根据权利要求1或2所述的高Q值陶瓷材料,其特征在于:所述Y2O3包覆改性Al2O3粉末的平均粒径为0.3μm~0.6μm。
7.权利要求1~6中任意一项所述的高Q值陶瓷材料的制备方法,其特征在于,包括以下步骤:
1)将Al2O3粉末加入流化床,再在3个不同的气化室内使硝酸镁、氢氧化钙和正硅酸乙酯气化后用空气依次带入流化床,在Al2O3粉末表面依次沉积MgO层、CaO层和SiO2层,得到MgO-CaO-SiO2包覆改性Al2O3粉末;
2)将MgO-CaO-SiO2包覆改性Al2O3粉末煅烧后进行破碎,再与Y2O3包覆改性Al2O3粉末混合后进行球磨,即得高Q值陶瓷材料。
8.根据权利要求7所述的高Q值陶瓷材料的制备方法,其特征在于:步骤2)所述煅烧在900℃~1100℃下进行,煅烧时间为1h~3h。
9.根据权利要求7或8所述的高Q值陶瓷材料的制备方法,其特征在于:步骤2)所述球磨的时间为1h~3h。
10.权利要求1~6中任意一项所述的高Q值陶瓷材料在制备陶瓷部件中的应用。
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