Niobate glass ceramic with alkali metal oxide substitute, low dielectric loss and high energy storage density as well as preparation method and application thereof

An alkali metal oxide, high energy storage density technology, applied in glass manufacturing equipment, glass molding, manufacturing tools, etc., can solve the problem of low utilization of raw materials, complex raw materials, and little research on potassium sodium niobate glass ceramic materials, etc. problem, to achieve the effect of simplifying the glass formula, uniform grain size and good compactness

Active Publication Date: 2021-01-15
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, niobate glass ceramics is a hot research topic of energy storage glass ceramics, most of which focus on strontium barium niobate glass powder or ceramics. Not high defects; and little research on potassium sodium niobate glass-ceramic materials

Method used

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  • Niobate glass ceramic with alkali metal oxide substitute, low dielectric loss and high energy storage density as well as preparation method and application thereof
  • Niobate glass ceramic with alkali metal oxide substitute, low dielectric loss and high energy storage density as well as preparation method and application thereof
  • Niobate glass ceramic with alkali metal oxide substitute, low dielectric loss and high energy storage density as well as preparation method and application thereof

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Embodiment 1

[0033] The crystallization treatment of glass sample in the present embodiment: at 800 o C insulation 2h.

[0034] The preparation method of the glass-ceramic material of the present embodiment comprises the following steps:

[0035] 1) The glass-ceramic material of this embodiment is made of mole percentage (1- x ): x ( x =0.000), take K 2 CO 3 , Na 2 CO 3 , Nb 2 o 5 , and SiO 2 Mix evenly by ball milling, then dry and sieve to obtain the mixture;

[0036] 2) Heat the quartz crucible from room temperature to 1100 with the furnace o C, start adding the mixture and continue heating to 1450 o C, and at 1450 o C under insulation 60min to make the mixture melt evenly, to obtain the mixed molten material; mix the molten material at 600 o C preheated copper plate forming, and then quickly put into the furnace at 500 o C under annealing 4h, obtain the glass matrix after the annealing;

[0037] 3) at 800 o C kept for 2h and then cooled to room temperature with the fu...

Embodiment 2

[0040] The formula of glass sample in the present embodiment is (1- x ): x ( x = 0.125), and at 1450 o C feed was melted and kept warm for 60 min, and other conditions were the same as in Example 1.

Embodiment 3

[0042] The formula of glass sample in the present embodiment is (1- x ): x ( x = 0.250), other conditions are the same as in Example 2.

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Abstract

The invention relates to a glass ceramic material which substitutes K2ONb2O5SiO2 with alkali metal oxide Na2O and has low dielectric loss and high energy storage density. A preparation method of the material comprises the following steps: firstly, taking K2CO3, Na2CO3, Nb2O5 and SiO2 as raw materials according to a chemical formula of 40[(1-x)K2O-xNa2O]-40Nb2O5-20SiO2 (the x is less than or equalto 0.500), uniformly mixing the powder through mechanical ball milling, and performing annealing; and performing melting, cooling molding and annealing to obtain a glass block, and performing heat preservation at 800 DEG C for 2 h, and performing crystallization treatment to obtain the glass ceramic material. The method is simple in preparation process, the raw materials are low in price, the manufacturing cost is low, a linear hysteresis loop can be obtained at the room temperature, the energy storage density reaches 2.44 J / cm<3> to the maximum, the dielectric loss is lower than 0.02, and theenergy storage efficiency is guaranteed to be 94% or above at the high temperature of 200 DEG C.

Description

technical field [0001] The invention relates to the field of glass ceramic materials and a preparation method thereof, in particular to an alkali metal oxide Na 2 O replaces K 2 O-Nb 2 o 5 -SiO 2 A glass-ceramic material with low dielectric loss and high energy storage density, its preparation method and application. Background technique [0002] In recent years, the rapid development of pulse technology in the fields of hybrid electric vehicles, aerospace and oil drilling has put forward the requirements of "high temperature, high energy density and high reliability" for energy storage dielectric capacitors. Glass-ceramics composed of crystal phase and dense glass phase are favored by researchers in the field of energy storage dielectric materials due to the high breakdown field strength of the internal dense glass phase and the good dielectric properties of the ferroelectric crystal phase. [0003] According to the calculation formula of energy storage density of line...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/00C03B32/02C03B25/00C03B19/02
CPCC03C10/00C03B19/02C03B25/00C03B32/02
Inventor 蒲永平杜欣怡彭鑫李润张倩雯陈敏张金波
Owner SHAANXI UNIV OF SCI & TECH
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