Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of high energy storage density strontium niobate-based tungsten bronze ceramic with wide temperature stability and preparation method

A strontium sodium niobate-based tungsten bronze technology with high energy storage density, which is applied in the field of electronic information functional materials and devices, can solve the problems of low relaxivity, abnormal grain growth, and large remanent polarization of strontium sodium niobate ceramics. Problems, suitable for mass industrial production, smooth dielectric peak, fast charging and discharging effect

Active Publication Date: 2022-08-02
HANGZHOU DIANZI UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pure sodium strontium niobate ceramics have difficulty in sintering and abnormal grain growth, which makes its withstand voltage lower than 200kV / cm
In addition, pure sodium strontium niobate ceramics have low relaxivity, resulting in large remanent polarization and low efficiency.
These disadvantages limit its application in energy storage

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
  • A kind of high energy storage density strontium niobate-based tungsten bronze ceramic with wide temperature stability and preparation method
  • A kind of high energy storage density strontium niobate-based tungsten bronze ceramic with wide temperature stability and preparation method
  • A kind of high energy storage density strontium niobate-based tungsten bronze ceramic with wide temperature stability and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of high energy storage density strontium niobate based tungsten bronze ceramic with wide temperature stability and chemical composition is Sr 2 NaNb 5- x Ta x O 15 , where x=0.5. Specifically include the following steps:

[0037] Step 1: Select SrCO 3 Powder, NaCO 3 Powder, Nb 2 O 5 Powder and Ta 2 O 5 Powder is the raw material, according to the general formula Sr 2 NaNb 4.5 Ta 0.5 O 15 Weigh the raw materials, add the same amount of anhydrous ethanol as the powder, and mix the powder evenly to form a slurry after one ball milling;

[0038] Step 2: Bake the slurry obtained in step 1 in a constant temperature oven at 90°C, remove absolute ethanol, and grind it in a mortar to obtain powder; then put the powder in a mold and press it into a material The block is pre-fired at 1050 ° C under airtight conditions, and the holding time is 4 hours to obtain a pre-synthesized ceramic sheet;

[0039] Step 3: Crush and grind the ceramic sheet obtained in ste...

Embodiment 2

[0043] A kind of high energy storage density strontium niobate based tungsten bronze ceramic with wide temperature stability and chemical composition is Sr 2 NaNb 5- x Ta x O 15 , where x=1.0. Specifically include the following steps:

[0044] Step 1: Select SrCO 3 Powder, NaCO 3 Powder, Nb 2 O 5 Powder and Ta 2 O 5 Powder is the raw material, according to the general formula Sr 2 NaNb 4.0 Ta 1.0 O 15 Weigh the raw materials, add the same amount of anhydrous ethanol as the powder, and mix the powder evenly to form a slurry after one ball milling;

[0045] Step 2: Bake the slurry obtained in step 1 in a constant temperature oven at 90°C, remove absolute ethanol, and grind it in a mortar to obtain powder; then put the powder in a mold and press it into a material The block is pre-fired at 1050 ° C under airtight conditions, and the holding time is 4 hours to obtain a pre-synthesized ceramic sheet;

[0046] Step 3: Crush and grind the ceramic sheet obtained in ste...

Embodiment 3

[0050] A kind of high energy storage density strontium niobate based tungsten bronze ceramic with wide temperature stability and chemical composition is Sr 2 NaNb 5- x Ta x O 15 , where x=1.25. Specifically include the following steps:

[0051] Step 1: Select SrCO 3 Powder, NaCO 3 Powder, Nb 2 O 5 Powder and Ta 2 O 5 Powder is the raw material, according to the general formula Sr 2 NaNb 3.75 Ta 1.25 O 15 Weigh the raw materials, add the same amount of anhydrous ethanol as the powder, and mix the powder evenly to form a slurry after one ball milling;

[0052] Step 2: Bake the slurry obtained in step 1 in a constant temperature oven at 90°C, remove absolute ethanol, and grind it in a mortar to obtain powder; then put the powder in a mold and press it into a material The block is pre-fired at 1050 ° C under airtight conditions, and the holding time is 4 hours to obtain a pre-synthesized ceramic sheet;

[0053] Step 3: Crush and grind the ceramic sheet obtained in ...

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
particle sizeaaaaaaaaaa
energy densityaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a strontium sodium niobate-based tungsten bronze ceramic with wide temperature stability and high energy storage density and a preparation method. 2 NaNb 5 O 15 based on the incorporation of a certain amount of Ta 5+ Substitute Nb 5+ , whose chemical formula is Sr 2 NaNb 5‑x Ta x O 15 , where 0.0≤x≤2.0. The pulsed energy storage medium ceramic material obtained by the present invention has a relatively high recoverable energy storage density W rec =3.99J / cm 3 , higher energy storage efficiency η=91.7%, under the electric field of 170kV / cm, the power density P D =78.7MW / cm 3 , the current density can reach 925.8A / cm 2 , the energy storage performance is greatly improved compared with the existing products. More importantly, the energy storage density has a change rate of less than 2.5% over a wide temperature range, showing excellent temperature stability. The preparation method has a simple technological process, is suitable for industrial production, and complies with the current lead-free environmental protection requirements.

Description

technical field [0001] The invention relates to the technical field of electronic information functional materials and devices, in particular to a strontium sodium niobate-based tungsten bronze ceramic with wide temperature stability and high energy storage density and a preparation method thereof. Background technique [0002] With the increase in energy demand and the consumption of fossil fuels, the problems of improving the utilization rate of traditional energy and broadening the practical scope of new energy have become increasingly prominent, which provides an opportunity for the rapid development of energy storage devices. Among these energy storage elements, dielectric capacitors have been widely used in electromagnetic pulse weapons, hybrid vehicles, biomedical equipment and other fields due to their advantages of ultra-fast charging and discharging speed and high power density, which meet the requirements of new energy development and utilization. application. Fa...

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 Patents(China)
IPC IPC(8): C04B35/495C04B35/622C04B41/88
CPCC04B35/495C04B35/622C04B41/88C04B41/5116C04B2235/3213C04B2235/3201C04B2235/3251C04B2235/6562C04B2235/6567C04B2235/786C04B2235/96
Inventor 郑鹏张新忠白王峰郑梁张阳
Owner HANGZHOU DIANZI UNIV