Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Sol-gel preparation method for copper yttrium titanate giant dielectric ceramic material

A sol-gel method and a technology for ceramic materials, which are applied in the field of preparation of giant dielectric ceramic materials, can solve the problems of difficulty in wide application and high dielectric loss, and achieve the effects of high yield, reduced dielectric loss and simple method.

Inactive Publication Date: 2014-08-20
SHAANXI NORMAL UNIV
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, studies have found that CCTO materials have a high dielectric constant and a high dielectric loss, making it difficult to be widely used in electronic devices requiring high dielectric constants such as capacitors and memories.

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
  • Sol-gel preparation method for copper yttrium titanate giant dielectric ceramic material
  • Sol-gel preparation method for copper yttrium titanate giant dielectric ceramic material
  • Sol-gel preparation method for copper yttrium titanate giant dielectric ceramic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Ingredients

[0035] According to formula Y 2 / 3 Cu 3 Ti 4 o 12 The stoichiometry of raw material Y(NO 3 ) 3 ·6H 2 O2.5537g, Cu(NO 3 ) 2 ·3H 2 O7.3212g, Ti(C 4 h 9 O) 4 13.90mL, Y(NO 3 ) 3 ·6H 2 O, Cu(NO 3 ) 2 ·3H 2 O was dissolved in 9mL of ethanol and deionized water volume ratio of 1:9 mixed solution, recorded as solution 1; Ti(C 4 h 9 O) 4 Dissolve it in 56mL of a mixed solution with a volume ratio of acetic acid and ethanol of 1:6, and record it as solution 2; slowly pour solution 1 into solution 2 with a stirring speed of 200 rpm, and the content of butyl titanate in the resulting mixed solution The concentration is 0.5mol / L, the volume fraction of acetic acid is 10%, and the volume fraction of deionized water is 11%. React in a water bath at 35°C for 6 hours to obtain a gel, which is aged for 8 hours and then placed in an oven Dry at 120°C, grind, and pass through an 80-mesh sieve to obtain xerogel powder.

[0036] 2. Pre-burning

[0037] P...

Embodiment 2

[0049] In the batching step 1 of embodiment 1, according to general formula Y 2 / 3 Cu 3 Ti 4 o 12 The stoichiometry of raw material Y(NO 3 ) 3 ·6H 2 O2.5537g, Cu(NO 3 ) 2 ·3H 2 O7.3212g, Ti(C 4 h 9 O) 4 13.90mL, Y(NO 3 ) 3 ·6H 2 O, Cu(NO 3 ) 2 ·3H 2 O dissolved in 20mL deionized water, recorded as solution 1; Ti(C 4 h 9 O) 4 Dissolve in 99mL of a mixed solution with a volume ratio of acetic acid and ethanol of 1:4, and record it as solution 2; slowly pour solution 1 into solution 2 with a stirring speed of 200 rpm, and the butyl titanate in the resulting mixed solution The concentration is 0.3mol / L, the volume fraction of acetic acid is 15%, and the volume fraction of deionized water is 15%. React in a water bath at 40°C for 4 hours to obtain a gel. The obtained gel is aged for 8 hours and then placed in an oven Dry at 120°C, grind, and pass through an 80-mesh sieve to obtain xerogel powder. The other steps are the same as in Example 1, and a copper yttrium...

Embodiment 3

[0051] In the batching step 1 of embodiment 1, according to general formula Y 2 / 3 Cu 3 Ti 4 o 12 The stoichiometry of raw material Y(NO 3 ) 3 ·6H 2 O2.5537g, Cu(NO 3 ) 2 ·3H 2 O7.3212g, Ti(C 4 h 9 O) 4 13.90mL, Y(NO 3 ) 3 ·6H 2 O, Cu(NO 3 ) 2 ·3H 2 O was dissolved in 10mL of deionized water and ethanol in a mixed solution with a volume ratio of 1:6, which was recorded as solution 1; Ti(C 4 h 9 O) 4 Dissolve in 20.5mL of a mixed solution of acetic acid and ethanol with a volume ratio of 1:8, and record it as solution 2; slowly pour solution 1 into solution 2 with a stirring speed of 200 rpm, and the butyl titanate in the resulting mixed solution The concentration is 0.9mol / L, the volume fraction of acetic acid is 5%, the volume fraction of deionized water is 3%, and react at room temperature for 8 hours to obtain a gel. Dry, grind, and pass through an 80-mesh sieve to obtain xerogel powder. The other steps are the same as in Example 1, and a copper yttrium ...

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

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Concentrationaaaaaaaaaa
Login to View More

Abstract

The invention discloses a sol-gel preparation method for a copper yttrium titanate giant dielectric ceramic material. According to the method, yttrium nitrate, copper nitrate and tetra-n-butyl titanate are used as raw materials, absolute ethyl alcohol is used as a solvent, so Y2 / 3Cu3Ti4O12 ceramic powder with high purity, uniform granularity and high activity is obtained, and the problems of low product purity and low powder activity caused by non-uniform mixing of raw materials and easy introduction of impurities during ball milling in preparation of Y2 / 3Cu3Ti4O12 ceramic powder through a solid phase reaction are overcome. The preparation method is simple and has high yield; and the prepared copper yttrium titanate giant dielectric ceramic material has low dielectric loss, a high dielectric constant, good electric constant frequency stability and wide application prospects, wherein the dielectric constant is as high as 52607 and dielectric loss is 0.10 at a frequency of 1 kHz, the dielectric constant is no less than 50000 in a wide frequency range, and dielectric loss is no more than 0.10 in a wide frequency range.

Description

technical field [0001] The invention belongs to the technical field of ceramic materials, and in particular relates to a preparation method of a giant dielectric ceramic material used for storage or capacitor devices. Background technique [0002] With the demand for miniaturization, integration and intelligence of practical devices such as ceramic capacitors and microwave dielectric components in the microelectronics technology market, research on dielectric ceramics has attracted more and more attention, especially in dynamic random storage (DRAM) DRAM) and high dielectric capacitors (MLCC) have broad application prospects. Barium titanate-based Ba with a perovskite phase structure x Sr 1-x TiO 3 and lead titanate-based PbZr x Ti 1-x o 3 materials, the dielectric constant can reach more than 1000. Domestic and foreign matchups x Sr 1-x TiO 3 and PbZr x Ti 1-x o 3 High dielectric materials have been intensively studied. At present, this material has been widel...

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
IPC IPC(8): C04B35/462C04B35/622
Inventor 晁小练李俊伟杨祖培
Owner SHAANXI NORMAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com