Na2O-CaO-SiO2 opaque glass and preparation method thereof

A 1.na2o-cao-sio2, opaque glass technology, applied in the field of building materials, can solve the problems of large crystallization tendency, easy precipitation of large particles, poor process control, etc., to improve glass hardness, opacity, etc. The effect of improved performance and simple process

Active Publication Date: 2011-11-23
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the main oxide opacifiers mainly include phosphate, tin compound, arsenic oxide and antimony oxide, etc. Among them, phosphate is a better opacifier, but its crystallization tendency is relatively large, and large particles are easily precipitated if the process control is not good. crystallization of

Method used

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  • Na2O-CaO-SiO2 opaque glass and preparation method thereof
  • Na2O-CaO-SiO2 opaque glass and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1, a kind of Na 2 O-CaO-SiO 2 The preparation method of opal glass comprises the following steps:

[0029] 1), ingredients:

[0030] SiO 2 64.0 parts, CaO 7.0 parts, Na 2 CO 3 27.36 parts, Al 2 o 3 2.0 copies, K 2 CO 3 2.93 parts, MgO 3.0 parts, P 2 o 5 5 parts and ZrO 2 1 serving.

[0031] Namely: Na 2 CO 3 27.36 parts replaced Na 2 O16.0 parts, K 2 CO 3 2.93 copies replaced K 2 O 2 parts.

[0032] 2), fully mix all the ingredients in step 1), then place in a furnace and heat to 1450°C to melt and keep warm for 3 hours to obtain a clear and uniform molten glass;

[0033] 3) Pour the molten glass obtained in step 2) into a mold for molding and allow it to cool naturally and slowly to room temperature to finally obtain uniform milky white opalescent glass.

Embodiment 2

[0034]Embodiment 2, a kind of Na 2 O-CaO-SiO 2 The preparation method of opal glass comprises the following steps:

[0035] 1), ingredients:

[0036] SiO 2 69.0 parts, CaO 6.0 parts, Na 2 CO 3 27.36 parts, Al 2 o 3 1.0 copies, K 2 CO 3 0.73 parts, MgO 1.5 parts, P 2 o 5 4 parts and ZrO 2 2 servings.

[0037] Namely: Na 2 CO 3 27.36 parts replaced Na 2 O16.0 parts, K 2 CO 3 0.73 parts replaced K 2 O 0.5 parts.

[0038] 2), fully mix all the ingredients in step 1), then place in a furnace and heat to 1450°C to melt and keep warm for 3 hours to obtain a clear and uniform molten glass;

[0039] 3) Pour the molten glass obtained in step 2) into a mold for molding and allow it to cool naturally and slowly to room temperature to finally obtain uniform milky white opalescent glass.

Embodiment 3

[0040] Embodiment 3, a kind of Na 2 O-CaO-SiO 2 The preparation method of opal glass comprises the following steps:

[0041] 1), ingredients:

[0042] SiO 2 59.0 parts, CaO 8.0 parts, Na 2 CO 3 34.20 parts, Al 2 o 3 2 copies, K 2 CO 3 2.93 parts, MgO 3.0 parts, P 2 o 5 1.0 parts and ZrO 2 5 servings.

[0043] Namely: Na 2 CO 3 34.20 parts instead of Na 2 O 20.0 parts, K 2 CO 3 2.93 instead of 2.

[0044] 2), fully mix all the ingredients in step 1), then place in a furnace and heat to 1450°C to melt and keep warm for 3 hours to obtain a clear and uniform molten glass;

[0045] 3) Pour the molten glass obtained in step 2) into a mold for molding and allow it to cool naturally and slowly to room temperature to finally obtain uniform milky white opalescent glass.

[0046] The performance corresponding to each embodiment of table 1

[0047]

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Abstract

The invention discloses Na2O-CaO-SiO2 opaque glass, which consists of the following components in percentage by weight: 59 to 70 percent of SiO2, 6.0 to 10 percent of CaO, 16 to 24 percent of Na2O, 1 to 2 percent of Al2O3, 0.5 to 3 percent of K2O, 1 to 3 percent of MgO, 1.0 to 5.0 percent of P2O and 1.0 to 5.0 percent of ZrO. The invention also discloses a method for preparing the opaque glass, which comprises the following steps of: 1) mixing materials, wherein Na2O is replaced by Na2CO3 with equal molar weight and K2O is replaced by K2CO3 with equal molar weight; 2) heating the mixed materials in a furnace to the temperature of between 1,420 and 1,470 DEG C for melting, and keeping the temperature for 2.8 to 3.2 hours; and 3) pouring molten glass obtained in the step 2) into a mould for forming, and naturally and slowly cooling to room temperature to obtain the milky opaque glass.

Description

technical field [0001] The invention relates to the technical field of building materials, more specifically to a Na 2 O-CaO-SiO 2 Method of production of opaque glass. Background technique [0002] Opalescent glass is a kind of basic glass with specific composition, which contains a large number of highly dispersed particles, which are produced by controlling heating or heat treatment. Crystalline solid material. Highly dispersed particles can be unpenetrated sand particles, micro-bubbles, phase-separated liquid droplets, and precipitated grains. [0003] Due to its milky white appearance and excellent performance, opal glass is an ideal material for the architectural decoration industry. To make the glass opacified, a certain amount of opacifying agent needs to be added to the raw materials. The most common opacifying agent is fluoride, such as fluorite, sodium fluorosilicate, cryolite, potassium fluoride, aluminum fluoride, etc. However, during the melting and moldin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/097C03C10/00
Inventor 郭兴忠杨辉杨广跃
Owner ZHEJIANG UNIV
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