Temperature-stable high-Q-value niobium tantalite microwave dielectric ceramic and preparation method thereof

A microwave dielectric ceramic and temperature-stable technology, applied in the field of niobium tantalate microwave dielectric ceramics and their preparation, can solve problems such as poor temperature stability, and achieve the effects of no pollution in the process, broad application prospects and simple preparation process.

Inactive Publication Date: 2015-12-16
TIANJIN UNIV
View PDF2 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome ZnZr(Nb, Ta)O 8 The shortcomings of poor temperature stability of niobium tantalate microwave dielectric ceramics, the quality factor of the system can be improved by micro-doping CoO, and by adding a certain amount of TiO 2 To obtain a resonant frequency temperature coefficient close to zero, to provide a new type of niobium tantalate microwave dielectric ceramic with high quality factor, which can be used in the manufacture of microwave devices such as intermediate high-Q microwave resonators, microwave dielectric substrates, and microwave antennas

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Temperature-stable high-Q-value niobium tantalite microwave dielectric ceramic and preparation method thereof
  • Temperature-stable high-Q-value niobium tantalite microwave dielectric ceramic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0018] The present invention is further illustrated by specific examples below. The raw materials used in the examples are all commercially available analytical reagents (purity greater than 99.9%). Specific examples are as follows.

[0019] (1) The raw materials ZnO, CoO, ZrO 2 , Nb 2 O 5 , Ta 2 O 5 Respectively weigh the ingredients by massaging ratio 0.85:0.15:1:1:1;

[0020] (2) Mix the powders prepared above and put them in a ball milling tank, add zirconia balls and deionized water, and mill them on a planetary ball mill for 6 hours. The mass ratio of powder, zirconia balls and deionized water is 1 :1:1.5; Place the ball milled raw materials in an infrared drying oven at 100°C and dry them, and then pass through a 40-mesh sieve after drying to obtain a powder with uniform particles;

[0021] (3) Pre-fire the above-mentioned uniformly mixed powder at 950°C for 2 hours to synthesize frit;

[0022] (4) Add 2.05% polyvinyl alcohol by mass to the pre-fired frit, and then press 0.43 (Zn

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

No PUM Login to view more

Abstract

The invention discloses a temperature-stable high-Q-value niobium tantalite microwave dielectric ceramic and a preparation method thereof. The temperature-stable high-Q-value niobium tantalite microwave dielectric ceramic has a chemical formula 0.43(Zn 0.85Co0.15)ZrNbTaO8+0.57TiO2. The preparation method comprises the following steps: respectively weighing and batching chemical raw materials ZnO, CoO, ZrO2, Nb2O5 and Ta2O5 according to a stoichiometric ratio; carrying out ball milling, drying and sieving, and presintering at 950 DEG C, so as to synthesize clinkers; and carrying out secondary ball milling and compression forming to obtain blanks, sintering at 1160-1240 DEG C, and preserving the temperature for 2-6 hours, so as to prepare a temperature-stable high-Q-value niobium tantalite microwave dielectric ceramic material. According to the preparation method, the temperature coefficient of resonance frequency approximates to zero (tauf-0*10<-10>/DEG C), the niobium tantalite microwave dielectric ceramic belongs to a microwave dielectric material with a medium dielectric constant (35-40), the quality factor is higher than 35,000GHz, and the sintering temperature is relatively low; the process is simple, and the pollution is avoided in the preparation process; the niobium tantalite microwave dielectric ceramic has wide application prospect.

Description

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

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
no application Login to view more
Owner TIANJIN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap