Novel niobate-base glass ceramic energy-storing material and preparation method and application thereof

A technology for energy storage materials and glass ceramics, which is applied in the field of new niobate-based glass ceramic energy storage materials and their preparation, and can solve the problems of low breakdown field strength, uneven composition, and complexity.

Inactive Publication Date: 2016-03-23
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main crystalline phase of this system is Ba x Sr 1-x NbO 3 , the glass phase is ZnO-SiO 2 -B 2 o 3 , but because the components of the system are too complex, it is easy to cause uneven composition during the sample preparation process, and in the crystallization process, it is easy to generate many impurity phases, resulting in a low breakdown field strength of this series of samples. From the patent According to the reported breakdown strength, the breakdown strength of all samples does not exceed 200Kv / mm, which is far lower than [(Ba 1-x Sr x ) 2 NaNb 5 o 15 ] 0.6 -[SiO 2 ] 0.4 The breakdown strength value of

Method used

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  • Novel niobate-base glass ceramic energy-storing material and preparation method and application thereof
  • Novel niobate-base glass ceramic energy-storing material and preparation method and application thereof
  • Novel niobate-base glass ceramic energy-storing material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 (x=0)

[0026] Niobate Glass Ceramics 6Na with High Energy Storage Density 2 O-24BaO-30Nb 2 o 5 -40SiO 2

[0027] (1) with analytically pure BaCO 3 , NaCO 3 , Nb 2 o 5 , SiO 2 Powder as raw material, according to the designed chemical composition 6Na 2 O-24BaO-30Nb 2 o 5 -40SiO 2 The mass of each component is weighed, and the total mass of the sample is 80-100 grams.

[0028] (2) Select anhydrous ethanol as the dispersant, use agate balls to mill in a polytetrafluoroethylene ball mill tank at a speed of 50-60 rpm, and dry the evenly mixed slurry. The time of ball milling is 20~30h, and the ratio of ball to material during ball milling is (1.0~1.5):1.

[0029] (3) Put the dried glass raw material into the crucible for high-temperature melting, the heating rate of the high-temperature furnace is 1400° C., and the high-temperature melting time is 5 hours. Then the high-temperature melt is quickly poured into the preheated copper mold to obtain a tr...

Embodiment 2

[0032] Example 2 (x=0.25)

[0033] Niobate Glass Ceramics 6Na with High Energy Storage Density 2 O-18BaO-6SrO-30Nb 2 o 5 -40SiO 2

[0034] (1) with analytically pure BaCO 3 , SrCO 3 , NaCO 3 , Nb 2 o 5 , B 2 o 3 、Al 2 o 3 , SiO 2 Powder as raw material, according to the designed chemical composition 6Na 2 O-18BaO-6SrO-30Nb 2 o 5 -40SiO 2 The mass of each component is weighed, and the total mass of the sample is 80-100 grams.

[0035] (2) Select anhydrous ethanol as the dispersant, use agate balls to mill in a polytetrafluoroethylene ball mill tank at a speed of 50-60 rpm, and dry the evenly mixed slurry. The time of ball milling is 20~30h, and the ratio of ball to material during ball milling is (1.0~1.5):1.

[0036] (3) Put the dried glass raw material into the crucible for high-temperature melting, the heating rate of the high-temperature furnace is 1500° C., and the high-temperature melting time is 5 hours. Then the high-temperature melt is quickly poure...

Embodiment 3

[0039] Example 3 (x=0.50)

[0040] Niobate Glass Ceramics 6Na with High Energy Storage Density 2 O-12BaO-12SrO-30Nb 2 o 5 -40SiO 2

[0041] (1) with analytically pure BaCO 3 , SrCO 3 , NaCO 3 , Nb 2 o 5 , SiO 2 Powder as raw material, according to the designed chemical composition 6Na 2 O-12BaO-12SrO-30Nb 2 o 5 -40SiO 2 The mass of each component is weighed, and the total mass of the sample is 80-100 grams.

[0042] (2) Select anhydrous ethanol as the dispersant, use agate balls to mill in a polytetrafluoroethylene ball mill tank at a speed of 50-60 rpm, and dry the evenly mixed slurry. The time of ball milling is 20~30h, and the ratio of ball to material during ball milling is (1.0~1.5):1.

[0043] (3) Put the dried glass raw material into the crucible for high-temperature melting, the heating rate of the high-temperature furnace is 1600° C., and the high-temperature melting time is 2 hours. Then the high-temperature melt is quickly poured into the preheated c...

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Abstract

The invention relates to a novel niobate-base glass ceramic energy-storing material and a preparation method and application thereof. The chemical composition of the material is [(Ba<1-x>Sr<x>) <2>NaNb<5>O<15>] <0.6>-[SiO<2>] <0.4>, wherein 0<=x<=1. With BaCO3, SrCO3, NaCO3, Nb2O5 and SiO2 powder being raw materials, the mass of each component is weighed according to the designed chemical composition, the components are subjected to ball milling and even mixing and then added into a crucible to be molten at high temperature, and high-temperature melt is rapidly poured into a preheated copper mold for stress removal and then cut into slices with the thickness of 1.0 mm; the glass slices are placed into an annealing furnace to be subjected to controlled crystallization, and through controlling ingredients of the glass raw materials and optimizing a crystallization technology, the prepared niobate glass ceramic has high energy-storing density and reliability. Compared with the prior art, the method is simple, and through testing of experiments, the prepared glass ceramic material has high energy-storing density and charging and discharging efficiency and is expected to be used as a novel energy-storing capacitor material.

Description

technical field [0001] The invention belongs to the field of dielectric energy storage materials, and in particular relates to a novel niobate-based glass ceramic energy storage material and its preparation method and application. Background technique [0002] In order to meet the miniaturization and lightweight requirements of pulsed power systems, the development of dielectric materials as core components is facing more challenges. How to further improve the energy storage density of dielectric materials has become the focus of research. Material workers from various countries are actively exploring and researching Dielectric material with high dielectric constant, low electrical loss and high dielectric strength. Niobate ferroelectric glass-ceramics have attracted extensive attention in this field in recent years due to their excellent dielectric properties. At present, there are mainly strontium barium niobate (SrxBa1-xNb2O6, x=0.25-0.75), lead metaniobate (PbNb 2 o 6...

Claims

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Application Information

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IPC IPC(8): C04B35/495
Inventor 翟继卫薛双喜沈波
Owner TONGJI UNIV
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