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Low-magnesium superwhite glass

A technology of ultra-white glass and low magnesium, applied in the field of glass, can solve the problems of increased clarification difficulty, brittle glass, poor weather resistance, etc., and achieve the effects of improving chemical stability, increasing coefficient of expansion, and reducing liquidus temperature

Inactive Publication Date: 2017-12-12
CHINA LUOYANG FLOAT GLASS GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of formula has a high magnesium content, which can reduce the crystallization tendency and crystallization speed, and improve chemical stability, but it can cause difficulty in forming and homogenizing the glass, especially for ultra-clear glass, due to its high thermal conductivity Make clarification difficult, increase the difficulty of clarification, and easily cause the glass to become brittle and have poor weather resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: The composition and mass percentage of low-magnesium ultra-clear glass glass are SiO 2 72.2%, Al 2 o 3 2.8%, Na 2 O 14.5%, CaO 9%, MgO 0.5%, K 2 O1%; properties of the glass made: liquidus temperature (°C) 988, softening point (°C) 736, chemical stability 0.898, expansion coefficient (10 -7 / °C) 90.9.

Embodiment 2

[0023] Embodiment 2: The composition and mass percent of low-magnesium ultra-clear glass glass are SiO 2 72%, Al 2 o 3 2.5%, Na 2 O 15%, CaO 8.9%, MgO 0.4%, K 2 O1.2%; properties of the glass made: liquidus temperature (°C) 971, softening point (°C) 732, chemical stability 1.055, expansion coefficient (10 -7 / °C) 93.2.

Embodiment 3

[0024] Embodiment 3: The component composition and mass percent of low-magnesium ultra-clear glass glass are SiO 2 73%, Al 2 o 3 2.8%, Na 2 O 13.5%, CaO 9%, MgO 0.7%, K 2 O1%; properties of the glass made: liquidus temperature (°C) 1006, softening point (°C) 746, chemical stability 0.725, expansion coefficient (10 -7 / °C) 87.5.

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Abstract

The invention discloses low-magnesium superwhite glass. The low-magnesium superwhite glass comprises the following components in percent by mass: 65-75% of SiO2, 1-4% of Al2O3, 11-17% of Na2O, 7-13% of CaO, 0-1.5% of MgO and 0-2% of K2O. Compared with the prior art, the low-magnesium superwhite glass has the advantages and effects as follows: due to adjustment of the MgO content to 0.2-0.5%, reduction in the weatherability of the glass due to use of high-content MgO for controlling the crystallization speed of the glass is avoided; due to increase of Al2O3 content, the crystallization trend is reduced, and the chemical stability of the superwhite glass is improved; due to adjustment and control of the alkali metal content, the expansion coefficient of the glass is increased and the glass is easily tempered; due to decrease of the liquid phase temperature, the adaptability to floating production of the glass is higher.

Description

technical field [0001] The invention relates to a glass, in particular to a low-magnesium ultra-clear glass. Background technique [0002] Ultra-white glass has ultra-white and transparent characteristics. It is a high-quality, multi-functional new type of high-end glass with a transmittance of over 91.5%. It is crystal clear, high-end and elegant, and is known as the "Crystal Prince" of the glass family. . Due to its high transmittance and superior physical and mechanical properties, it is widely used in glass mirrors for solar thermal power generation mirrors, high-end buildings and decorations, solar cells, and greenhouse lighting and ecological agriculture. [0003] The currently commonly used ultra-clear glass formula has a relatively high magnesium content, generally accounting for about 4% by weight. This type of formula has a high magnesium content, which can reduce the crystallization tendency and crystallization speed, and improve chemical stability, but it can c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/087C03C4/00
CPCC03C3/087C03C4/0092
Inventor 郭卫司敏杰王艳霞沈洁郭利波
Owner CHINA LUOYANG FLOAT GLASS GROUP
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