Medium-sintering temperature stable microwave dielectric ceramic material
A microwave dielectric ceramic and temperature-stabilized technology is applied in the field of novel medium-temperature sintering temperature-stabilized microwave dielectric ceramic materials, which can solve problems such as low sintering temperature, and achieve the effects of simple preparation process, no pollution in the process, and broad application prospects.
Inactive Publication Date: 2014-06-18
TIANJIN UNIV
View PDF3 Cites 8 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] 0.4Zn provided by the present invention 0.8 Mg 0.2 ZrNb 2 o 8 -0.6TiO 2 It is a composite microwave dielectric ceramic material with a monoclinic structure and a manganese-tantalite structure. Its sintering temperature is low (≤1150°C), and it has good microwave dielectric properties, especially its resonant frequency temperature coefficient is almost zero, which meets the requirements of microwave dielectric The application of ceramic materials in high-performance microwave devices, and there is no relevant report of the present invention at home and abroad
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0019] 1) ZnO, MgO, ZrO 2 , Nb 2 o 5 、TiO 2 Weigh the ingredients according to the molar ratio of 0.32:0.08:0.4:0.4:0.6, mix the raw materials into the nylon tank, and ball mill for 4 hours; put the ball milled raw materials in an infrared drying oven to dry and sieve;
[0020] 2) Calcining the sieved raw material at 850°C and keeping it warm for 6 hours to synthesize the precursor;
[0021] 3) Add 0.55% polyvinyl alcohol by mass into the precursor, put it into a ball mill jar, add zirconia balls and deionized water ball mill for 7 hours, dry and sieve; then use a powder tablet press with a pressure of 4MPa to form Φ10mm×5mm cylinder;
[0022] 4) The cylinder was sintered at 1100°C and held for 6 hours to produce a medium-temperature sintering temperature-stable microwave dielectric ceramic material;
[0023] 5) Test its microwave dielectric properties with a network analyzer, and its properties are as follows:
[0024] The dielectric constant is: 47.1
[0025] The qual...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| sintering temperature | aaaaa | aaaaa |
| quality factor | aaaaa | aaaaa |
| quality factor | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses a medium-sintering temperature stable microwave dielectric ceramic material. The chemical formula of the medium-sintering temperature stable microwave dielectric ceramic material is 0.4Zn0.8Mg0.2ZrNb2O8-0.6TiO2; firstly, ZnO, MgO, ZrO2, Nb2O5 and TiO2 are weighed and prepared according to a stoichiometric ratio, respectively; secondly, a precursor is synthesized through ball-milling, drying, siveving and calcining at 850 DEG C; thirdly, the precursor is pressed into a blank by virtue of pressure, and the blank is sintered at a temperature ranging from 1040 to 1120 DEG C, and finally, the temperature stable microwave dielectric ceramic material is obtained. The dielectric constant of the medium-sintering temperature stable microwave dielectric ceramic material ranges from 45 to 48, the quality factor of the same ranges from 40,421 to 43,935 GHz, and the temperature coefficient of resonance frequency of the same ranges from minus 13.7*10<-6> to 5.5*10<-6> / DEG C. The preparation process of the medium-sintering temperature stable microwave dielectric ceramic material is simple, is pollution-free in process, and has wide application prospect.
Description
technical field [0001] The invention belongs to a ceramic composition characterized by components, in particular to a novel medium-temperature sintering temperature-stable microwave dielectric ceramic material. Background technique [0002] The continuous development of modern communication technology, especially the development of mobile communication towards high reliability and small size, puts forward higher requirements for microwave dielectric materials. Microwave dielectric ceramics have become one of the most active research fields of functional ceramics in recent years. Among them, the research on temperature stability has become a hot spot. Microwave devices need to work at different temperatures, and to ensure the stability of the carrier signal at different temperatures, it is necessary to require that the resonant frequency of the microwave dielectric material does not change with temperature, or changes slightly. Therefore, the near-zero resonant frequency tem...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/622
Inventor 李玲霞蔡昊成高正东孙浩吕笑松
Owner TIANJIN UNIV