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Preparation method of neodymium calcium aluminotitanate microwave dielectric material based on reaction sintering
The invention discloses a preparation method of a neodymium calcium aluminotitanate microwave dielectric material based on reaction sintering, which comprises the following steps: proportioning CaCO3,TiO2, Nd2O3 and Al2O3 with purity of more than or equal to 99% according to Ca1.15Nd0.85Al0.85Ti0.15O4 (CNAT for short), carrying out wet ball-milling mixing on the materials for 4 hours by using ethanol as a ball-milling medium, conducting drying, conducting pressing forming by hands, and conducting sintering on the ceramic material for 6 hours at 1450-1550 DEG C. The microwave dielectric ceramic prepared by the method has a moderate dielectric constant [epsilon]r of 17.1-19.2, a high Q*f value up to 74920 GHz and a near-zero temperature coefficient [tau]f of 3.2 to -1.2 ppm/DEG C, and can be used for manufacturing microwave devices such as resonators, antennas, filters and the like.
本发明公开了一种基于反应烧结的铝钛酸钕钙微波介质材料制备方法，该方法为：将纯度≥99%的CaCO3、TiO2、Nd2O3和Al2O3按Ca1.15Nd0.85Al0.85Ti0.15O4(简称CNAT)配料，之后将物料湿式球磨混合4h，以乙醇为球磨介质，干燥之后采用手压的方式压制成型，最后将瓷料在1450~1550℃下烧结6小时；利用本方法制备的微波介质陶瓷，其介电常数适中εr=17.1~19.2，Q×f值高，高达74920GHz，谐振频率温度系数近零τf=‑3.2~‑1.2ppm/℃，可用于谐振器、天线、滤波器等微波器件的制造。
Preparation method of neodymium calcium aluminotitanate microwave dielectric material based on reaction sintering
The invention discloses a preparation method of a neodymium calcium aluminotitanate microwave dielectric material based on reaction sintering, which comprises the following steps: proportioning CaCO3,TiO2, Nd2O3 and Al2O3 with purity of more than or equal to 99% according to Ca1.15Nd0.85Al0.85Ti0.15O4 (CNAT for short), carrying out wet ball-milling mixing on the materials for 4 hours by using ethanol as a ball-milling medium, conducting drying, conducting pressing forming by hands, and conducting sintering on the ceramic material for 6 hours at 1450-1550 DEG C. The microwave dielectric ceramic prepared by the method has a moderate dielectric constant [epsilon]r of 17.1-19.2, a high Q*f value up to 74920 GHz and a near-zero temperature coefficient [tau]f of 3.2 to -1.2 ppm/DEG C, and can be used for manufacturing microwave devices such as resonators, antennas, filters and the like.
本发明公开了一种基于反应烧结的铝钛酸钕钙微波介质材料制备方法，该方法为：将纯度≥99%的CaCO3、TiO2、Nd2O3和Al2O3按Ca1.15Nd0.85Al0.85Ti0.15O4(简称CNAT)配料，之后将物料湿式球磨混合4h，以乙醇为球磨介质，干燥之后采用手压的方式压制成型，最后将瓷料在1450~1550℃下烧结6小时；利用本方法制备的微波介质陶瓷，其介电常数适中εr=17.1~19.2，Q×f值高，高达74920GHz，谐振频率温度系数近零τf=‑3.2~‑1.2ppm/℃，可用于谐振器、天线、滤波器等微波器件的制造。
Preparation method of neodymium calcium aluminotitanate microwave dielectric material based on reaction sintering
一种基于反应烧结的铝钛酸钕钙微波介质材料制备方法
ZHOU HUANFU (author) / HE SEN (author)
2020-11-17
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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