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Barium-lanthanum-titanium high-entropy microwave dielectric ceramic with tungsten bronze structure and preparation method of barium-lanthanum-titanium high-entropy microwave dielectric ceramic
The invention discloses a barium-lanthanum-titanium high-entropy microwave dielectric ceramic with a tungsten bronze structure and a preparation method of the barium-lanthanum-titanium high-entropy microwave dielectric ceramic, and belongs to the field of microwave dielectric ceramics. The chemical formula of the microwave dielectric ceramic is Ba4 (La1/5Pr1/5Nd1/5Sm1/5Eu1/5) 28/3Ti18O54, and the preparation method of the microwave dielectric ceramic comprises the following steps: proportioning raw materials BaCO3, La2O3, Pr6O11, Nd2O3, Sm2O3, Eu2O3 and TiO2 according to the chemical formula, carrying out ball milling, drying, and presintering at 1100-1200 DEG C; carrying out secondary ball milling, drying, granulation and sieving, pressing into a green body, and sintering at 1350-1500 DEG C to obtain the barium-lanthanum-titanium system high-entropy microwave dielectric ceramic with the tungsten bronze structure. According to the invention, the high-entropy concept is introduced into the barium-lanthanum-titanium microwave dielectric ceramic with the tungsten bronze structure for the first time, and the high-entropy microwave dielectric ceramic with the single-phase tungsten bronze structure is successfully prepared by regulating and controlling the process parameters such as the pre-sintering temperature, the sintering temperature and the sintering time. The prepared high-entropy ceramic is excellent in microwave dielectric property, has a high dielectric constant, a high quality factor and a relatively low temperature coefficient of resonance frequency, and is expected to be widely applied to the field of mobile communication.
本发明公开了一种钨青铜结构钡镧钛系高熵微波介质陶瓷及其制备方法，属于微波介质陶瓷领域。所述微波介质陶瓷的化学式为Ba4(La1/5Pr1/5Nd1/5Sm1/5Eu1/5)28/3Ti18O54，其制备方法包括：将原料BaCO3、La2O3、Pr6O11、Nd2O3、Sm2O3、Eu2O3、TiO2按化学式进行配料，经过球磨、烘干后于1100~1200℃预烧；再经二次球磨、烘干、造粒和过筛后压制成坯体，于1350～1500℃烧结得到钨青铜结构钡镧钛系高熵微波介质陶瓷。本发明首次将高熵概念引入钨青铜结构钡镧钛系微波介质陶瓷，通过调控预烧温度、烧结温度及烧结时间等工艺参数成功制备了具有单相钨青铜结构的高熵微波介质陶瓷。本发明制备的高熵陶瓷微波介电性能优异，具有高介电常数，高品质因数以及较低的谐振频率温度系数，有望广泛应用于移动通信领域。
Barium-lanthanum-titanium high-entropy microwave dielectric ceramic with tungsten bronze structure and preparation method of barium-lanthanum-titanium high-entropy microwave dielectric ceramic
The invention discloses a barium-lanthanum-titanium high-entropy microwave dielectric ceramic with a tungsten bronze structure and a preparation method of the barium-lanthanum-titanium high-entropy microwave dielectric ceramic, and belongs to the field of microwave dielectric ceramics. The chemical formula of the microwave dielectric ceramic is Ba4 (La1/5Pr1/5Nd1/5Sm1/5Eu1/5) 28/3Ti18O54, and the preparation method of the microwave dielectric ceramic comprises the following steps: proportioning raw materials BaCO3, La2O3, Pr6O11, Nd2O3, Sm2O3, Eu2O3 and TiO2 according to the chemical formula, carrying out ball milling, drying, and presintering at 1100-1200 DEG C; carrying out secondary ball milling, drying, granulation and sieving, pressing into a green body, and sintering at 1350-1500 DEG C to obtain the barium-lanthanum-titanium system high-entropy microwave dielectric ceramic with the tungsten bronze structure. According to the invention, the high-entropy concept is introduced into the barium-lanthanum-titanium microwave dielectric ceramic with the tungsten bronze structure for the first time, and the high-entropy microwave dielectric ceramic with the single-phase tungsten bronze structure is successfully prepared by regulating and controlling the process parameters such as the pre-sintering temperature, the sintering temperature and the sintering time. The prepared high-entropy ceramic is excellent in microwave dielectric property, has a high dielectric constant, a high quality factor and a relatively low temperature coefficient of resonance frequency, and is expected to be widely applied to the field of mobile communication.
本发明公开了一种钨青铜结构钡镧钛系高熵微波介质陶瓷及其制备方法，属于微波介质陶瓷领域。所述微波介质陶瓷的化学式为Ba4(La1/5Pr1/5Nd1/5Sm1/5Eu1/5)28/3Ti18O54，其制备方法包括：将原料BaCO3、La2O3、Pr6O11、Nd2O3、Sm2O3、Eu2O3、TiO2按化学式进行配料，经过球磨、烘干后于1100~1200℃预烧；再经二次球磨、烘干、造粒和过筛后压制成坯体，于1350～1500℃烧结得到钨青铜结构钡镧钛系高熵微波介质陶瓷。本发明首次将高熵概念引入钨青铜结构钡镧钛系微波介质陶瓷，通过调控预烧温度、烧结温度及烧结时间等工艺参数成功制备了具有单相钨青铜结构的高熵微波介质陶瓷。本发明制备的高熵陶瓷微波介电性能优异，具有高介电常数，高品质因数以及较低的谐振频率温度系数，有望广泛应用于移动通信领域。
Barium-lanthanum-titanium high-entropy microwave dielectric ceramic with tungsten bronze structure and preparation method of barium-lanthanum-titanium high-entropy microwave dielectric ceramic
一种钨青铜结构钡镧钛系高熵微波介质陶瓷及其制备方法
WANG GENG (Autor:in) / WANG HUIFENG (Autor:in) / LI ZEPING (Autor:in)
20.08.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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