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

Preparation method for copper calcium titanate multiphase ceramic with high potential gradient

A technology of calcium copper titanate and multiphase ceramics is applied in the field of electrical insulating ceramic materials, which can solve the problems of large dielectric loss and direct current conductance, limited application, low breakdown strength, etc., and achieves increased energy storage density and excellent comprehensive performance. , the effect of convenient operation

Inactive Publication Date: 2012-12-12
XI AN JIAOTONG UNIV
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the other hand, the dielectric loss and DC conductance of CCTO ceramics are large and the breakdown strength is low, which limits its application. Therefore, it is urgent to reduce the loss and DC conductance and improve the breakdown strength while maintaining its high dielectric constant. Wear field strength

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
  • Preparation method for copper calcium titanate multiphase ceramic with high potential gradient
  • Preparation method for copper calcium titanate multiphase ceramic with high potential gradient
  • Preparation method for copper calcium titanate multiphase ceramic with high potential gradient

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Prepare CCTO calcined powder, the steps are:

[0032] Analytical pure (purity>99.0%) CaCO 3 , CuO and TiO 2 Powder, as CaCO 3 :CuO:TiO 2 =1:3:4 molar ratio into the ball mill tank (CaCO 3 Powder 15.20g, CuO powder 36.26g, TiO 2 48.53g of powder, about 100g of the three powders in total), then add 100ml of ethanol to the ball mill jar, and then put the ball mill jar on a planetary ball mill for 6 hours (frequency is 20Hz), after ball milling, dry at 80°C and pass through 100 mesh Sieve the powder, put the powder into a crucible and place it in a muffle furnace for pre-firing. The pre-firing procedure is as follows: heat up from room temperature at 200°C / h to 950°C and keep it warm for 10 hours, then cool down to room temperature with the furnace after keeping warm , to get CCTO calcined powder.

[0033]2) Mill the CCTO calcined powder in a planetary ball mill for 12h (frequency 20Hz) and then dry it at 80°C to obtain the milled CCTO calcined powder. Weigh 30g of...

Embodiment 2

[0041] According to the metering ratio of alumina is 8wt%, the 17.65g Al(NO 3 ) 3 9H 2 O is formulated into Al(NO 3 ) 3 aqueous solution; other steps are the same as in Example 1.

Embodiment 3

[0043] According to the metering ratio of alumina is 10wt%, the 22.06gAl(NO 3 ) 3 9H 2 O is formulated into Al(NO 3 ) 3 aqueous solution; other steps are the same as in Example 1.

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 provides a preparation method for a copper calcium titanate multiphase ceramic with high potential gradient. The method comprises the following steps: preparing uniformly mixed powder of aluminum hydroxide and copper calcium titanate by using a liquid phase precipitation method, controlling the pH value of a reaction to be in a range of 8 to 9 by using an aluminum nitrate solution as a titrant and an ammonia water solution as a precipitating agent and stirring copper calcium titanate suspension with an electromagnetic mixer so as to allow aluminum hydroxide to be uniformly distributed; filtering the suspension, carrying out washing with distilled water, carrying out drying in a baking oven at a temperature of 120 DEG C and then successively carrying out grinding, sieving and calcining so as to obtain uniformly mixed powder; and preparing a ceramic sample by using a traditional solid phase method so as to obtain a multiphase ceramic composed of cupric aluminate and copper calcium titanate, wherein a copper calcium titanate multiphase ceramic sample which contains 8 wt% of alumina and is sintered at a temperature of 1100 DEG C for 4 h has a potential gradient as high as 2063 V / mm, more than 9 times higher than that of a pure copper calcium titanate sample. The preparation method provided by the invention is simple; and the prepared multiphase ceramic has the characteristics of high potential gradient, great energy storage density and small low-frequency loss.

Description

technical field [0001] The invention belongs to the field of electrical insulating ceramic materials, and in particular relates to a method for preparing mixed powder by a liquid-phase precipitation method, and then using a traditional solid-phase method to prepare high-potential gradient copper calcium titanate (CCTO) composite ceramics. Background technique [0002] Due to the further improvement of the component market's requirements for the miniaturization and high integration of devices, the application of high dielectric constant materials to ceramic capacitors has become a hot spot at present. [0003] CaCu 3 Ti 4 o 12 (CCTO), as a new type of dielectric material, has attracted great attention for its good comprehensive properties. It has the characteristics of high dielectric constant and stable performance. Its dielectric constant value at room temperature is as high as 10 5 , remained almost unchanged in the temperature range of 100K-380K, and no structural pha...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/462C04B35/622
Inventor 李建英唐娴贾然李盛涛
Owner XI AN JIAOTONG 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