Medium-temperature sintered low-loss temperature stabilization type microwave dielectric ceramic material
A microwave dielectric ceramic and temperature-stable technology, which is applied in the field of novel medium-temperature sintering low-loss temperature-stable microwave dielectric ceramic materials, can solve the problems of large resonant frequency temperature coefficient, low sintering temperature, limited application and the like, and achieves a simple preparation process, The effect of no pollution in the process and broad application prospects
Inactive Publication Date: 2014-05-14
TIANJIN UNIV
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Problems solved by technology
At the same time, most medium-temperature sintered materials have a large temperature coefficient of resonance frequency, which limits their application
[0004] Zn 0.84 Ni 0.16 TiNb 2 o 8 -0.18TiO 2 It is a composite microwave dielectric ceramic material with manganese tantalum ore and rutile structure. Its sintering temperature is low (≤1150°C), and it has good microwave dielectric properties. There are no related reports of the invention at home and abroad.
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Embodiment 1
[0021] 1) Combine ZnO, NiO, Nb 2 O 5 , TiO 2 Weigh the ingredients with a molar ratio of 0.84:0.16:1:1.18 respectively. After mixing, add the raw materials into a nylon tank and ball mill for 7 hours; place the ball milled raw materials in an infrared drying box for drying and sieving;
[0022] 2) The sieved raw materials are calcined at 810°C and kept for 4 hours to synthesize the precursor;
[0023] 3) Add 0.55% polyvinyl alcohol by mass to the precursor, put it in a ball milling tank, add zirconia balls and deionized water ball mill for 6 hours, then dry and sieving; then use a powder tablet press at a pressure of 8MPa Press into a cylinder of Φ10mm×5mm;
[0024] 4) The cylinder is sintered at 1080°C for 6 hours to form a medium-temperature sintered low-loss and temperature-stable microwave dielectric ceramic material;
[0025] 5) Use a network analyzer to test the microwave dielectric properties of the product, and its performance is as follows:
[0026] The dielectric constant is:...
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Abstract
The invention discloses a medium-temperature sintered low-loss temperature stabilization type microwave dielectric ceramic material which has a chemical formula of Zn0.84Ni0.16TiNb2O8-0.18TiO2. The medium-temperature sintered low-loss temperature stabilization type microwave dielectric ceramic material is prepared by adopting the steps: respectively weighing and compounding ZnO, NiO, Nb2O5 and TiO2 according to a stoichiometric ratio respectively, ball-milling in a tank, drying, screening and then calcining at a temperature of 810 DEG C to synthesize a precursor; pressing the precursor into a blank body, and sintering at a temperature of 1040-1120 DEG C to prepare the medium-temperature sintered low-loss temperature stabilization type microwave dielectric ceramic material. The dielectric constant of the medium-temperature sintered low-loss temperature stabilization type microwave dielectric ceramic material is 40-46, the quality factor of the medium-temperature sintered low-loss temperature stabilization type microwave dielectric ceramic material is 37000-39500 GHz, and the temperature coefficient of resonance frequency of the medium-temperature sintered low-loss temperature stabilization type microwave dielectric ceramic material is -17-20*10<-6> / DEG C. The preparation process is simple, and is free from pollution, and wide in application prospect.
Description
Technical field [0001] The invention belongs to a ceramic composition characterized by components, and particularly relates to a novel medium-temperature sintered low-loss temperature-stable microwave dielectric ceramic material. Background technique [0002] With the development of satellite mobile communications towards high frequencies, low-loss (high-Q) materials will be an important trend in the development of microwave dielectric ceramic materials. At the same time, the miniaturization, chip and integration of microwave equipment are also the direction and trend of future development. Therefore, as one of the main components, high-frequency or microwave dielectric components also need to be lightweight and miniaturized, which places higher requirements on the performance of microwave dielectric ceramics. [0003] At present, most high-performance microwave dielectric ceramic materials have high sintering temperature, which greatly limits their wide application. The low temp...
Claims
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IPC IPC(8): C04B35/495C04B35/622
Inventor 李玲霞蔡昊成高正东孙浩吕笑松
Owner TIANJIN UNIV