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Synthetic beta-spodumene solid solution, microcrystalline glass prepared from synthetic beta-spodumene solid solution and preparation method of microcrystalline glass

A technology of glass-ceramic and manufacturing method, which is applied in the field of inorganic materials, and can solve problems such as the reduction of the thermal expansion coefficient and the reduction of the solid solution capacity of β-spodumene

Active Publication Date: 2021-03-26
胡勇波
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, due to the higher amount of Na in the natural spodumene mineral + 、K + Oxide, excess sodium, potassium replacement lithium reduces Li 2 The content of O changes the lattice structure of β-spodumene generated at the transition temperature, and absorbs free SiO 2 and additional SiO 2 The ability to form β-spodumene solid solution decreases, and the excess K 2 O, Na 2 The additive effect of the high thermal expansion coefficient of O makes the excess Na + 、K + Impurity of natural spodumene reduces the effect of lowering the thermal expansion coefficient

Method used

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  • Synthetic beta-spodumene solid solution, microcrystalline glass prepared from synthetic beta-spodumene solid solution and preparation method of microcrystalline glass
  • Synthetic beta-spodumene solid solution, microcrystalline glass prepared from synthetic beta-spodumene solid solution and preparation method of microcrystalline glass
  • Synthetic beta-spodumene solid solution, microcrystalline glass prepared from synthetic beta-spodumene solid solution and preparation method of microcrystalline glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] A kind of synthetic β-spodumene solid solution, according to β-spodumene solid solution chemical formula Li 2 OAl 2 o 3 nSiO 2 Li in 2 O and Al 2 o 3 and nSiO 2 The theoretical weight ratio of , where n>4, will synthesize the required ratio of Li-containing 2 O and Al 2 o 3 and SiO 2 The corresponding raw materials are prepared, and the synthetic Li obtained by sintering at the sintering temperature 2 OAl 2 o 3 nSiO 2 , that is, β-spodumene solid solution, part of SiO with n>4 2 Excess free SiO absorbed into the β-spodumene lattice 2 or additional SiO 2 .

[0061] Preferably, the firing temperature is 1300°C-1400°C.

[0062] Preferably, the β-spodumene solid solution molecular formula Li 2 OAl 2 o 3 nSiO 2 Wherein n>4 means 4<n≤8, and the mass number of crystalline material accounts for more than 90% in the synthesized β-spodumene solid solution.

[0063] Further preferably, the chemical composition of the β-spodumene solid solution material compri...

Embodiment 2

[0071] A kind of manufacture method of above-described embodiment 1 synthetic β-spodumene solid solution, comprising:

[0072] According to the chemical formula Li of β-spodumene solid solution 2 OAl 2 o 3 nSiO 2 Li in (42 O and Al 2 o 3 and SiO 2 The proportion of the weight percentage will be the corresponding Li 2 O, Al 2 o 3 , SiO 2 The precursor raw material is made into a batch material, which is ground through a 200-mesh sieve, and the obtained dry powder material is sintered at a sintering temperature to obtain a β-spodumene solid solution.

[0073] Preferably, the Li 2 O and Al 2 o 3 and SiO 2 Among the precursor raw materials, Li 2 The O source is LiCO 3 , the source of alumina is 1000 mesh alumina powder, SiO 2 The source adopts 1000 mesh high-purity stone super fine powder.

[0074] According to the chemical composition in the 8 preparation examples of example 1 in embodiment 1, obtain the raw material batch formula of 8 preparation examples listed...

Embodiment 3

[0090] A kind of synthetic β-spodumene solid solution, according to β-spodumene solid solution chemical formula Li 2 OAl 2 o 3 nSiO 2 Li in 2 O and Al 2 o 3 and nSiO 2 Theoretical weight ratio, where n>4, in the ratio of Li 2 O and Al 2 o 3 and SiO 2 Among the corresponding raw materials, spodumene concentrate was used as the introduction of Li 2 OAl 2 o 3 4SiO 2 source, n>4 parts SiO 2 The source uses high-purity quartz powder, plus TiO 2 1%-2%. It is further preferred that in the spodumene concentrate, Na 2 O content≤0.3%, K 2 O content ≤ 0.3%. Synthesize the spodumene concentrate and high-purity quartz powder raw materials with the required ratio, plus TiO 2 Fine powder raw materials, prepared and sintered at the sintering temperature to obtain synthetic Li 2 OAl 2 o 3 nSiO 2 , that is, β-spodumene solid solution, part of SiO with n>4 2 Excess free SiO absorbed into the β-spodumene lattice 2 or additional SiO 2 . Its reaction equation is:

[009...

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Abstract

The invention belongs to the technical field of inorganic materials, and relates to a synthetic beta-spodumene solid solution, microcrystalline glass prepared from the synthetic beta-spodumene solid solution and a preparation method of the microcrystalline glass In the synthetic beta-spodumene solid solution, according to the theoretical mass ratio of Li2O to Al2O3 to nSiO2 in the chemical formulaLi2OAl2O3nSiO2 of the beta-spodumene solid solution, n is larger than 4 and smaller than or equal to 8, corresponding raw materials containing Li2O, Al2O3 and SiO2 are prepared according to the ratiorequired by synthesis and sintered at the sintering temperature, and the synthesized Li2OAl2O3nSiO2 is obtained, wherein the part of SiO2 of which n is greater than 4 is excessive free SiO2 absorbedin beta spodumene crystal lattices or added SiO2 to form the beta-spodumene solid solution. The microcrystalline glass is prepared from the synthesized beta spodumene solid solution and matrix glass.The microcrystalline glass comprises the following chemical components in percentage by weight: 68%-78% of SiO2, 14.0%-22.0% of Al2O3, 2%-5.5% of Li2O, 0.3%-1.8% of MgO, 1%-3% of ZnO, 1%-3% of B2O3, 0%-3% of BaO, 0.2%-0.4% of ZrO2, 0-1.5% of TiO2, 0%-0.3% of K2O and 0%-0.3% of Na2O.

Description

technical field [0001] The invention belongs to the technical field of inorganic materials, and relates to a synthetic β-spodumene solid solution, a glass-ceramic made from the synthetic β-spodumene solid solution and a manufacturing method thereof. Background technique [0002] Spodumene is a mineral raw material whose chemical formula is Li 2 O·Al 2 o 3 4SiO2 2 , chemical composition LiAl[Si 2 o 6 ], where Li 2 The theoretical content of O is as high as 8.03%. Spodumene concentrate generally contains Li 2 O is 6.3 to 7.5%. In fact, the content usually ranges from 2.91 to 7.66%, which may be the natural spodumene minerals always contain Na + , Mg 2+ 、K + , Ca 2+ , Fe 2+ 、Cr 3+ , Mn 2+ Wait for a small amount of ions, due to the replacement of lithium by sodium and potassium. When spodumene is roasted to about 1000 °C, it rapidly transforms into β-type spodumene, and its lattice structure can absorb free SiO 2 and additional SiO 2 , forming a solid solution...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/19C04B35/622C04B35/64C03C10/12C03C3/093C03C3/089C03C6/04C03B25/00C03B32/02
CPCC04B35/19C04B35/622C04B35/64C03C10/0027C03C3/089C03C3/093C03C1/00C03B25/00C03B32/02C04B2235/3203C04B2235/5436C04B2235/6562C04B2235/6565C04B2235/6567Y02P40/57
Inventor 胡勇波何庆衍罗悦
Owner 胡勇波
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