CN103663964B - A kind of high-silicon jade-like glass-ceramics - Google Patents

Abstract

The invention provides a high-silica jade-like crystallized glass, which is a base material composed of the following components in weight percentage: 75% silicon dioxide, 14% to 15% alumina, 7% to 8% sodium oxide, and boron oxide. 2%-4%, melt at 1600℃-1650℃ for 16h~24h to obtain molten glass, and make it into micronized powder with a particle size less than 200 mesh, then put the micronized powder into the mold and heat it up to 1080℃~1120℃ for 8h~10h and then keep it warm. High silica jade-like crystallized glass made in 1h to 2h; the volume density of the high silica jade-like crystallized glass is 2.45g/cm ³ ~ 2.5g/cm ³ ; the molybdenum density of the high silica jade-like crystallized glass is Hardness is 6.8~7. The high-silica jade-like crystallized glass provided by the invention has a translucent jade-like appearance and has the moistness and waxy texture of natural jade. It simplifies the ingredient ratio and reduces the cost while ensuring the high toughness and high strength of the crystallized glass. .

Description

A kind of high-silicon jade-like glass-ceramics

technical field

The invention relates to the field of glass-ceramics, in particular to a high-silicon jade-like glass-ceramic.

Background technique

With the steady and continuous development of my country's national economy, people's living standards are improving, and the demand for high-grade building materials is increasing, especially the demand for alternative products of non-radiation high-grade stone is more urgent, but domestic high-grade stone substitute products are brittle. It is not easy to process and shape, so many high-grade stone materials need to be imported from abroad, and the cost is greatly increased.

Glass-ceramics, also known as ceramic glass, has dual characteristics of glass and ceramics. Glass-ceramics is composed of crystals with regular atomic arrangements. Therefore, glass-ceramics has higher brightness than ceramics and stronger toughness than glass. Glass-ceramic combines the triple advantages of glass, ceramics and natural stone. It is superior to natural stone and ceramics. It can be used for building curtain walls and indoor high-end decorations. It can also be used as structural materials for machinery, insulating materials for electronics and electricians, and large-scale Integrated circuit bottom plate materials, microwave oven heat-resistant columns, chemical and anti-corrosion materials, and mining wear-resistant materials have become ideal substitutes for high-grade stone materials.

Existing glass-ceramic has the defects of complex composition and high cost, which leads to high cost of promotion and use of glass-ceramic, and seriously inhibits the development of glass-ceramic industry.

Contents of the invention

The technical problem to be solved by the present invention is to provide a high-silicon jade-like glass-ceramic with low cost and good toughness.

In order to solve the above-mentioned technical problems, the high-silicon jade-like glass-ceramic provided by the present invention consists of the base material of the following components by weight percentage: 75% of silicon dioxide, 14%-15% of aluminum oxide, 7%-8% of sodium oxide, Boron oxide 2%-4%, and high-silicon jade-like glass-ceramics prepared by the following steps: melting the base material at 1600°C-1650°C for 16h-24h, obtaining glass liquid after clarification, and making the glass liquid into particle size After the micropowder is less than 200 mesh, the micropowder is made into 2-200-mesh granules and put into the mold. After 8h-10h, the mold containing the granules is heated to 1080°C-1120°C, then kept for 1h-2h, and cooled to High-silicon jade-like glass-ceramics are prepared at room temperature; the bulk density of the high-silicon jade-like glass-ceramics is 2.45g/cm ³ to 2.5g/cm ³ ; the Mohs hardness of the high-silicon jade-like glass-ceramics is 6.8～7.

In each component of the high-silicon jade-like glass-ceramics provided by the present invention, silicon dioxide endows the glass-ceramics with good chemical stability and thermal stability, can improve the strength of the glass-ceramics, reduce the coefficient of expansion of the glass-ceramics, and reduce Refractive index; alumina can reduce the crystallization tendency of glass-ceramics, improve chemical stability, mechanical strength and hardness, improve thermal stability, and reduce electrical insulation; sodium oxide can reduce the viscosity of glass liquid, promote the melting and melting of glass liquid Clarification; Boron oxide can reduce the thermal expansion coefficient of glass-ceramics, improve thermal stability, and lower the high-temperature viscosity of glass liquid.

The high-silicon jade-like glass-ceramic with the above-mentioned composition ratio has simple components, and its cost is reduced from about 3,000 yuan per ton to about 1,500 yuan per ton for the existing glass-ceramic, and it has good toughness and no radiation. The appearance of silicon jade-like glass-ceramics is translucent jade-like, with the moistness and waxy texture of natural jade.

Preferably, the high-silicon jade-like glass-ceramic has a flexural strength of 45MPa-55MPa.

Preferably, the compressive strength of the high-silicon jade-like glass-ceramic is 240MPa-260MPa.

Preferably, the high-silicon jade-like glass-ceramic has an impact toughness of 3.2kj/cm ³ -3.4kj/cm ³ .

The high-silicon jade-like glass-ceramics provided by the invention presents a translucent jade-like appearance, has the moistness and waxy texture of natural jade, and ensures high toughness and high strength of the glass-ceramics while simplifying the composition ratio and reducing costs , and it is easy to further process and shape, and can be widely used in high-grade stone substitutes and other fields.

detailed description

In order to make the above objects, features and advantages of the invention more obvious and comprehensible, specific implementations of the invention will be described in detail below.

In the following description, a lot of specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do it without departing from the meaning of the present invention. By analogy, the present invention is therefore not limited to the specific examples disclosed below.

Table 1 is a table of performance parameters of high-silicon jade-like glass-ceramics under different compositions.

As shown in Table 1, the high-silicon jade-like glass-ceramic of the present invention has high flexural and compressive strength, high hardness and strong impact toughness. The finished high-silicon jade-like glass-ceramic has the moistness and waxy texture of natural jade, and can be prepared into profiles of different sizes to facilitate processing.

Table 1

Under the condition of knowing the content of specific components, the jade-like glass-ceramics of the present invention can be produced according to methods known in the art, preferably as follows:

1. Select one or more of quartz sand, albite, wax stone, sodium carbonate, boric acid, sodium nitrate, and alumina as raw materials to provide the composition of high-silicon jade-like glass-ceramics, according to the examples in Table 1 Calculate the amount of raw materials according to the ratio of the ingredients, and mix them to obtain the base material after weighing. For those skilled in the art, the raw materials used to prepare high-silicon jade-like glass-ceramics are not limited to the above-mentioned disclosed raw materials, and other commonly used ones in this field can also be selected. raw material;

2. Melt the base material at 1600℃～1650℃ for 16h～24h, and obtain glass liquid after clarification;

3. After the glass liquid is made into micropowder with a particle size of less than 200 mesh, then the micropowder is made into 2-200 mesh particles and put into the mold;

4. Heat the mold with particles to 1080°C-1120°C for 8h-10h, then keep it warm for 1h-2h, cool down to room temperature to make high-silicon jade-like glass-ceramic, because there are a lot of gaps between the particles and inside the particles, During the heat treatment process in this step, the surface of the particles or micropowders is crystallized to form glass ceramics smoothly.

Although the present invention is described in conjunction with the above embodiments, the present invention is not limited to the above embodiments, but is only limited by the appended claims, and those skilled in the art can easily modify and change it, but without departing from the spirit and scope of the present invention.

Claims (4)

1. A high-silicon jade-like glass-ceramic, characterized in that, the base material is composed of the following components by weight percentage: silicon dioxide 75%, aluminum oxide 14%～15%, sodium oxide 7%～8%, Boron oxide 2%-4%, and high-silicon jade-like glass-ceramics prepared by the following steps: melting the base material at 1600°C-1650°C for 16h-24h, obtaining glass liquid after clarification, and making the glass liquid into particle size After the micropowder is less than 200 mesh, the micropowder is made into 2-200-mesh granules and put into the mold. After 8h-10h, the mold containing the granules is heated to 1080°C-1120°C, then kept for 1h-2h, and cooled to High-silicon jade-like glass-ceramic was prepared at room temperature; The volume density of the high-silicon jade-like glass-ceramic is 2.45g/cm ³ -2.5g/cm ³ ; The Mohs hardness of the high-silicon jade-like glass-ceramic is 6.8-7. 2 . The high-silicon jade-like glass-ceramics according to claim 1 , characterized in that the flexural strength of the high-silicon jade-like glass-ceramics is 45MPa˜55MPa. 3. The high-silicon jade-like glass-ceramics according to claim 1, characterized in that the compressive strength of the high-silicon jade-like glass-ceramics is 240MPa˜260MPa. 4 . The high-silicon jade-like glass-ceramics according to claim 1 , characterized in that the impact toughness of the high-silicon jade-like glass-ceramics is 3.2 kj/cm ³ -3.4 kj/cm ³ .