Calcium phosphate opaque glass and method for making same

A technology of opacified glass and a production method, which is applied in the field of glass and production, can solve problems such as changes in the degree of opacity, excessive grain growth, and environmental pollution, achieve high-temperature viscosity and surface tension reduction, overcome environmental pollution, and reduce production cost effect

Inactive Publication Date: 2008-05-21
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the production process of fluoride opacity glass, there are problems such as too fast grain growth and difficult control of crystal growth, and the volatilization of fluoride often causes changes in the degree of opacity during the glass melting process, resulting in environmental pollution.
At present, there are two patents related to opacified glass: the publication numbers are CN1792921A and CN1792922A, but the raw materials for the preparation of the two opacified glasses all use fluorine or fluoride, and the content is more than 3%, and the volatilization of fluorine will affect the local environment. cause serious impact
[0004] The existing production methods of phosphate opacified glass have the following defects: the opacification temperature is high, generally at 1000-1100°C; the time is long, usually several hours; the production efficiency is low; The process of introducing ashes, calcium phosphate and other substances into the glass makes it difficult to control the size of the opacity crystals and the opacification effect is not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1, a kind of preparation method of calcium phosphate opacified glass, carries out following steps successively:

[0018] 1) 70.0 parts of silicon dioxide, 1.0 parts of alumina, 9.5 parts of calcium oxide, 2.0 parts of magnesium oxide, 15.0 parts of sodium oxide, 2.0 parts of phosphorus pentoxide, 0.1 parts of boron oxide and 0.4 parts of calcium nitrate are uniformly mixed to form Raw materials, the above parts are parts by weight;

[0019] 2) Heat the above raw materials to 1300-1500°C to melt and clarify (natural clarification), and shape them by extrusion and drawing to obtain original glass;

[0020] 3) Heat treatment of the above-mentioned raw glass for emulsification at 700°C to 900°C (for example, 800°C) for 4 to 5 hours; then cool to normal temperature, and then perform polishing and cutting in sequence to obtain Calcium phosphate moderately opaque glass.

[0021] The calcium phosphate medium opacity glass has extremely low volatilization of phosphi...

Embodiment 2

[0022] Embodiment 2, a kind of preparation method of calcium phosphate opacified glass, carries out following steps successively:

[0023] 1) 75.0 parts of silicon dioxide, 2.0 parts of alumina, 8.0 parts of calcium oxide, 2.0 parts of magnesium oxide, 11.8 parts of sodium oxide, 1.0 part of phosphorus pentoxide, 0.1 part of boron oxide and 0.1 part of calcium nitrate are uniformly mixed to form Raw materials, the above parts are parts by weight;

[0024] 2) Heat the above raw materials to 1400-1500°C to melt and clarify (natural clarification), and shape them by extrusion and drawing to obtain original glass;

[0025] 3) The above-mentioned raw glass is subjected to opacification heat treatment at 700°C to 900°C, the heat treatment time is 2 to 4 hours; then cooled to room temperature, polished and cut in sequence to obtain calcium phosphate mild opacity glass .

[0026] The calcium phosphate lightly opalescent glass has good gloss and is faintly yellow when the light passe...

Embodiment 3

[0027] Embodiment 3, a kind of preparation method of calcium phosphate opacified glass, carries out following steps successively:

[0028] 1) 70.0 parts of silicon dioxide, 0.5 parts of alumina, 12.0 parts of calcium oxide, 4.0 parts of magnesium oxide, 9.8 parts of sodium oxide, 3.0 parts of phosphorus pentoxide, 0.2 parts of boron oxide and 0.5 parts of calcium nitrate are uniformly mixed to form Raw materials, the above parts are parts by weight;

[0029] 2) Heat the above raw materials to 1400-1500°C to melt and clarify (natural clarification), and shape them by extrusion and drawing to obtain original glass;

[0030] 3) The above raw glass is subjected to opacification heat treatment at 700°C to 900°C for 4 to 6 hours; then cooled to normal temperature, polished and cut in sequence to obtain calcium phosphate heavily opacified glass.

[0031] The calcium phosphate heavily opacified glass is translucent, with pure color and good finish.

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PUM

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Abstract

The invention discloses a manufacturing method for calcium phosphate opaque glass, which includes following steps: firstly, 70-75 portions of silicon dioxide, 0.5-2.0 portions of alumina, 8.0-12.0 portions of calcium oxide, 2.0-5.0 portions of magnesium oxide, 9.8-15.0 portions of sodium oxide, 1-3 portions of phosphorus pentoxide, 0.1-0.2 portions of boron oxide and 0.1-0.5 portions of calcium nitrate are evenly mixed into raw material; secondly, the raw material is melted and clarified and is stretched into forming through squeezing to obtain raw glass; thirdly, the heat treatment of opacifying is implemented on the raw glass, whish is then cooled to be at the normal temperature, and the polishing and the cutting forming are implemented successively to obtain the calcium phosphate opaque glass. The invention also provides the calcium phosphate opaque glass, which is made according to the preparation method. The calcium phosphate opaque glass of the invention has the advantage of perfect opaque effect.

Description

technical field [0001] The present invention relates to a kind of glass and its production method, in particular to an opal glass and its production method. Background technique [0002] Opal glass refers to the glass containing a large number of highly dispersed particles. Since the refractive index of the particles is different from that of the main glass, light will scatter and become opacified after being irradiated. As a new type of building decoration material, opalescent glass can not only overcome the poor wear resistance of glazed tiles, the polished vitrified tiles are easy to absorb dirt and have poor anti-fouling ability, the surface gloss of granite is not durable, high radioactivity, and the surface hardness of marble is low and acid-resistant. The disadvantages of traditional decorative materials such as poor alkalinity; and its appearance is beautiful and generous, durable, and it is a high-grade building decoration material. [0003] According to the type o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/097
Inventor 郭兴忠张玲洁杨辉
Owner ZHEJIANG UNIV
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