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Yttrium-excessive rare earth element-doped YAG microwave dielectric ceramic material and preparation method thereof
The invention provides an yttrium-excessive rare earth element-doped YAG microwave dielectric ceramic material and a preparation method thereof, the chemical general formula of the material is Y3.03-xRexAl5O12, Re is one or more of La < 3 + >, Ce < 3 + >, Nd < 3 + >, Sm < 3 + >, Gd < 3 + >, Er < 3 + >, Yb < 3 + > and Lu < 3 + >; 0.03 < = x < = 0.1; the preparation method comprises the following steps: burdening, ball milling, drying and sieving, pre-sintering, dry pressing, cold isostatic pressing, vacuum sintering and atmosphere controlled annealing. The material disclosed by the invention is typical YAG microwave dielectric ceramic, the obtained material captures a blade type dislocation structure at a grain boundary, the characteristic of low loss is realized, Q * f is between 160000 GHz and 200000 GHz, the relative dielectric constant epsilon r is between 10 and 16, and the frequency temperature coefficient tau f is between-36 ppm/DEG C and-25 ppm/DEG C. The formula does not contain volatile toxic metals such as Pb and Cd, the performance is stable, the application requirements of modern microwave devices can be met, the raw materials are sufficiently supplied in China, the price is low, and the low cost of the high-performance microwave ceramic becomes possible.
本发明提供钇过量的掺稀土元素的YAG微波介质陶瓷材料及其制备方法，材料化学通式为Y3.03‑xRexAl5O12，Re为La3+，Ce3+，Nd3+，Sm3+，Gd3+，Er3+，Yb3+，Lu3+多种稀土离子中的一种或多种；0.03≤x≤0.1；本发明的制备方法包括步骤：配料、球磨、烘干过筛、预烧、干压、冷等静压成型、真空烧结、气氛控制退火。本发明材料为典型YAG微波介电陶瓷，所得材料在晶界处捕获刃型位错结构，实现低损耗特征，Q×f在160000GHz～200000GHz之间，相对介电常数εr在10～16之间，频率温度系数τf在‑36ppm/℃～‑25ppm/℃之间。配方中不含Pb，Cd等挥发性有毒金属，性能稳定，能够满足现代微波器件的应用需求，原材料在国内供应充足，价格低廉，使高性能微波陶瓷的低成本化成为可能。
Yttrium-excessive rare earth element-doped YAG microwave dielectric ceramic material and preparation method thereof
The invention provides an yttrium-excessive rare earth element-doped YAG microwave dielectric ceramic material and a preparation method thereof, the chemical general formula of the material is Y3.03-xRexAl5O12, Re is one or more of La < 3 + >, Ce < 3 + >, Nd < 3 + >, Sm < 3 + >, Gd < 3 + >, Er < 3 + >, Yb < 3 + > and Lu < 3 + >; 0.03 < = x < = 0.1; the preparation method comprises the following steps: burdening, ball milling, drying and sieving, pre-sintering, dry pressing, cold isostatic pressing, vacuum sintering and atmosphere controlled annealing. The material disclosed by the invention is typical YAG microwave dielectric ceramic, the obtained material captures a blade type dislocation structure at a grain boundary, the characteristic of low loss is realized, Q * f is between 160000 GHz and 200000 GHz, the relative dielectric constant epsilon r is between 10 and 16, and the frequency temperature coefficient tau f is between-36 ppm/DEG C and-25 ppm/DEG C. The formula does not contain volatile toxic metals such as Pb and Cd, the performance is stable, the application requirements of modern microwave devices can be met, the raw materials are sufficiently supplied in China, the price is low, and the low cost of the high-performance microwave ceramic becomes possible.
本发明提供钇过量的掺稀土元素的YAG微波介质陶瓷材料及其制备方法，材料化学通式为Y3.03‑xRexAl5O12，Re为La3+，Ce3+，Nd3+，Sm3+，Gd3+，Er3+，Yb3+，Lu3+多种稀土离子中的一种或多种；0.03≤x≤0.1；本发明的制备方法包括步骤：配料、球磨、烘干过筛、预烧、干压、冷等静压成型、真空烧结、气氛控制退火。本发明材料为典型YAG微波介电陶瓷，所得材料在晶界处捕获刃型位错结构，实现低损耗特征，Q×f在160000GHz～200000GHz之间，相对介电常数εr在10～16之间，频率温度系数τf在‑36ppm/℃～‑25ppm/℃之间。配方中不含Pb，Cd等挥发性有毒金属，性能稳定，能够满足现代微波器件的应用需求，原材料在国内供应充足，价格低廉，使高性能微波陶瓷的低成本化成为可能。
Yttrium-excessive rare earth element-doped YAG microwave dielectric ceramic material and preparation method thereof
钇过量的掺稀土元素YAG微波介质陶瓷材料及制备方法
TANG BIN (author) / ZHOU MOKE (author) / SI FENG (author) / LI ENZHU (author) / ZHONG CHAOWEI (author) / ZHANG SHUREN (author)
2022-12-23
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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