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Low-dielectric microwave dielectric ceramic material for wireless passive temperature sensor and preparation method of low-dielectric microwave dielectric ceramic material
The invention relates to the technical field of electronic ceramics, and provides a low-dielectric microwave dielectric ceramic material for a wireless passive temperature sensor and a preparation method of the low-dielectric microwave dielectric ceramic material in order to solve the problem that the dielectric constant of an existing ceramic material is not suitable for preparing a dielectric resonator antenna type wireless passive temperature sensor. The ceramic material is of a tetragonal scheelite structure, the chemical composition of the ceramic material is CaRNbWO8, and R is one of Ce, La, Nd, Sm and Y. The material is prepared from CaO, Nb2O5, WO3 and rare earth oxide with the particle size of less than or equal to 2 mu m as raw materials through a solid-phase sintering method. The microwave dielectric property of the material is excellent, the dielectric constant epsilon r is equal to 12-14, the quality factor Q * f is equal to 20,000-60,000 GHz, the absolute value TCF of the temperature coefficient of resonance frequency is smaller than 20 ppm/DEG C, and meanwhile the microwave dielectric property of the material is excellent due to the characteristics that the dielectric constant is low and the dielectric constant is sensitive to temperature change. The microwave dielectric ceramic material meets the requirement of a dielectric resonator antenna type wireless passive temperature sensor on the principle that the dielectric constant of the ceramic material is linearly and monotonically changed along with the temperature to test the environment temperature, and is a microwave dielectric ceramic material which has great potential in the field of wireless passive temperature sensing.
本发明涉及电子陶瓷技术领域，为解决现有陶瓷材料介电常数不适于制备介质谐振器天线型无线无源温度传感器的问题，提供一种无线无源温度传感器用低介微波介质陶瓷材料及其制备方法。所述陶瓷材料为四方白钨矿结构，化学组成为CaRNbWO8，其中R为Ce、La、Nd、Sm、Y中的一种。其是以粒径均≤2μm的CaO、Nb2O5、WO3和稀土氧化物为原料，通过固相烧结法制备获得。材料的微波介电性能优异：介电常数εr=12‑14，品质因数Q×f=20,000‑60,000 GHz，谐振频率温度系数绝对值|TCF|＜20 ppm/℃，同时因具有低介电常数、介电常数对温度变化敏感的特点，符合介质谐振器天线型无线无源温度传感器利用陶瓷材料的介电常数随温度呈线性单调变化实现对环境温度测试的原理的要求，是一类在无线无源温度传感领域非常有潜力的微波介质陶瓷材料。
Low-dielectric microwave dielectric ceramic material for wireless passive temperature sensor and preparation method of low-dielectric microwave dielectric ceramic material
The invention relates to the technical field of electronic ceramics, and provides a low-dielectric microwave dielectric ceramic material for a wireless passive temperature sensor and a preparation method of the low-dielectric microwave dielectric ceramic material in order to solve the problem that the dielectric constant of an existing ceramic material is not suitable for preparing a dielectric resonator antenna type wireless passive temperature sensor. The ceramic material is of a tetragonal scheelite structure, the chemical composition of the ceramic material is CaRNbWO8, and R is one of Ce, La, Nd, Sm and Y. The material is prepared from CaO, Nb2O5, WO3 and rare earth oxide with the particle size of less than or equal to 2 mu m as raw materials through a solid-phase sintering method. The microwave dielectric property of the material is excellent, the dielectric constant epsilon r is equal to 12-14, the quality factor Q * f is equal to 20,000-60,000 GHz, the absolute value TCF of the temperature coefficient of resonance frequency is smaller than 20 ppm/DEG C, and meanwhile the microwave dielectric property of the material is excellent due to the characteristics that the dielectric constant is low and the dielectric constant is sensitive to temperature change. The microwave dielectric ceramic material meets the requirement of a dielectric resonator antenna type wireless passive temperature sensor on the principle that the dielectric constant of the ceramic material is linearly and monotonically changed along with the temperature to test the environment temperature, and is a microwave dielectric ceramic material which has great potential in the field of wireless passive temperature sensing.
本发明涉及电子陶瓷技术领域，为解决现有陶瓷材料介电常数不适于制备介质谐振器天线型无线无源温度传感器的问题，提供一种无线无源温度传感器用低介微波介质陶瓷材料及其制备方法。所述陶瓷材料为四方白钨矿结构，化学组成为CaRNbWO8，其中R为Ce、La、Nd、Sm、Y中的一种。其是以粒径均≤2μm的CaO、Nb2O5、WO3和稀土氧化物为原料，通过固相烧结法制备获得。材料的微波介电性能优异：介电常数εr=12‑14，品质因数Q×f=20,000‑60,000 GHz，谐振频率温度系数绝对值|TCF|＜20 ppm/℃，同时因具有低介电常数、介电常数对温度变化敏感的特点，符合介质谐振器天线型无线无源温度传感器利用陶瓷材料的介电常数随温度呈线性单调变化实现对环境温度测试的原理的要求，是一类在无线无源温度传感领域非常有潜力的微波介质陶瓷材料。
Low-dielectric microwave dielectric ceramic material for wireless passive temperature sensor and preparation method of low-dielectric microwave dielectric ceramic material
一种无线无源温度传感器用低介微波介质陶瓷材料及其制备方法
ZHANG BO (author) / LI WENYUAN (author) / CHANG AIMIN (author)
2024-06-07
Patent
Electronic Resource
Chinese
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