JPH05163035A - Production of pattern-containing crystallized glass - Google Patents

Abstract

PURPOSE:To provide a process for producing a pattern-containing crystallized glass having unique appearance different from conventional crystallized glass. CONSTITUTION:A plurality of small pieces of crystalline glass are mixed with a plurality of roughly crushed translucent crystallized glass pieces having an average transmittance of >=35% at 1mm thickness the mixture is heat-treated in a refractory mold frame to obtain a crystallized glass having a partially translucent natural stone-like pattern.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing patterned crystallized glass. In the present specification, the "crystalline glass" refers to a glass having the property of precipitating crystals by heat treatment, and the "crystallized glass" is obtained by heat-treating the crystalline glass, and already crystallized. Refers to the deposited glass.

[0002]

2. Description of the Related Art Since crystallized glass is excellent in mechanical strength, thermal shock strength, chemical durability, etc., it has been widely used as a construction material. For example, a mixture of crystalline glass particles and crystallized glass granules is accumulated in a refractory mold and heat-treated to fuse the crystalline glass particles and crystallized glass granules together. The crystallized glass obtained by the so-called integration method, in which crystals are precipitated on each crystalline glass body, is often used in place of natural stone because it has a natural marble pattern when the surface is polished.

[0003]

By the way, in recent years, building materials having various appearances have been developed in accordance with the diversification of architecture, and even a building material made of crystallized glass has the natural marble pattern as described above. Not only that, there is a demand for the development of materials that exhibit a new appearance.

An object of the present invention is to provide a method for producing a patterned crystallized glass which has an appearance different from that of conventional crystallized glass.

The method for producing a patterned crystallized glass of the present invention is characterized by the fact that, when heat-treated at a temperature higher than the softening point, small crystalline glass particles having a property of acicular crystals precipitating from the surface toward the inside while being softened and deformed. , And a plurality of crystallized glass granules, respectively, and then these are mixed and accumulated in a refractory mold, followed by heat treatment to soften and deform each crystalline glass body to crystallize. In the method for producing a patterned crystallized glass in which the crystalline glass particles and the crystallized glass granules are fused and integrated, and a crystal is precipitated in each crystalline glass particle, as the crystallized glass granules,
It is characterized by using a coarse crushed product of translucent crystallized glass having an average transmittance of 35% or more at a thickness of 1 mm.

[0006]

The method for producing a patterned crystallized glass of the present invention comprises:
As the crystallized glass crushed product, a crushed crystallized glass having an average transmittance of 35% or more in a thickness of 1 mm is used. The reason why the average transmittance is limited to 35% or more is that
If it is lower than this, the crushed crystallized glass has almost no translucency, and the appearance of the patterned crystallized glass obtained is the same as that of the conventional natural marble-like crystallized glass.

As the crystallized glass crushed product having such a light-transmitting property, those having various compositions can be used. For example, β-wollastonite (β-CaO.SiO 2) is used as a main crystal.
₂ ), diopside (CaO ・ MgO ・ 2SiO ₂ )
A crystallized glass having a crystallinity of about 20% or less can be used. Among these, particularly preferable are SiO ₂ 40 to 75% and Al ₂ O ₃ 2 to 1 by weight.
5%, CaO 3-15%, ZnO 0-15%, Ba
O 0-20%, B ₂ O ₃ 0-10%, Na ₂ O + K ₂
O + Li ₂ O having a composition of _{2 to} 20% and crystallized glass in which β-wollastonite is precipitated as a main crystal, or Si
O ₂ 45-75%, Al ₂ O ₃ 1-25%, CaO 1
~ 12.5%, MgO 0.5-12%, CaO + Mg
O 1.5 to 13%, BaO 0 to 18%, ZnO 0
_{~18%, Na 2 O 1~15%} , K 2 O 0~7%,
_{Li 2 O 0~5%, B 2} O 3 0~10%, P 2 O 5 0
It is a crystallized glass having a composition of -10% and having diopside as a main crystal.

Next, the method for producing the patterned crystallized glass of the present invention will be described.

First, when a heat treatment is performed at a temperature higher than the softening point, a plurality of crystallizable glass bodies having the property of precipitating needle-like crystals from the surface toward the inside while softening and deforming are prepared. In addition, the glass small body referred to herein means a water granulated product, a granule, a small sphere, a small piece, a rod-shaped material and the like.

Further, a plurality of crystallized glass crushed products having the above-mentioned translucency are prepared.

Next, the prepared crystalline glass particles and the crystallized glass crushed material are mixed and accumulated in a refractory mold. The mixing ratio of the crystallizable glass particles and the crystallized glass crushed product is preferably 30 to 80% by weight and 20 to 70% by weight, respectively.

Thereafter, when heat treatment is performed at a temperature higher than the softening point of the crystalline glass particles, the crystalline glass particles are softened and deformed, and the crystalline glass particles and the crystallized glass granules are fused and integrated. Needle-like crystals precipitate from the surface of the crystalline glass body toward the inside.

The patterned crystallized glass thus obtained exhibits a natural stone pattern based on the shapes of the crystallized glass particles and the crushed crystallized glass when the surface thereof is polished,
At least a part thereof has translucency. In the method of the present invention, a colored oxide is added to the raw material of the crystalline glass particles or the crystallized glass granules, or an inorganic pigment powder is mixed with the crystalline glass particles and the crystallized glass granules. It is possible to add color to the patterned crystallized glass by adding it at this time.

The average transmittance referred to in the present invention means that a sample having a thickness of 1 mm is prepared from crystallized glass before crushing, and the sample is mirror-polished, and then 10 × 15 using a spectrophotometer.
It is a value measured in a wavelength range of 300 to 700 nm with a measurement area of mm.

[0015]

EXAMPLES The method for producing patterned crystallized glass of the present invention will be described below based on examples.

(Example 1) First, SiO _{2 is} expressed as a weight percentage.
59.0%, Al ₂ O ₃ 7.0%, CaO 18.0
%, ZnO 6.5%, BaO 4.6%, B ₂ O ₃
A glass raw material mixture having a composition of 0.6%, Na ₂ O 2.3%, and K ₂ O 2.0% was prepared as 1400 to 1
It was melted at 500 ° C. for 16 hours. Next, this molten glass was dropped into water and water-crushed, and the obtained water-crushed product was classified to obtain a crystalline glass body having a diameter of 1 to 5 mm. When crystallized, this crystallizable glass body precipitates β-wollastonite as a main crystal and has a crystallinity of about 40% and a thickness of 1 m.
It is a white crystallized glass having an average transmittance of 23% in m.

Further, SiO _{2 is} 60.0% by weight,
Al ₂ O ₃ 6.0%, CaO 10.0%, ZnO
7.0%, BaO 10.0%, B ₂ O ₃ 1.0%, N
a ₂ O4.0%, K ₂ O 2.0% glass raw material mixture is prepared to have the composition to melt in the same manner as described above, after the granulated, the resulting water grind and classified diameter 1-5
mm crystalline glass bodies were obtained. Then, the crystalline glass bodies are collected in a mullite mold and heat-treated at 1100 ° C. for 2 hours to obtain a milky white translucent crystallized glass in which β-wollastonite is precipitated as a main crystal. Got the body Further, this crystallized glass body was crushed with a crusher to obtain a crystallized glass crushed product having translucency. The crystallized glass crushed product had a crystallinity of about 17% and an average transmittance of 45% at a thickness of 1 mm.

Next, 50% by weight of the crystallizable glass particles and 50% by weight of the crushed crystallized glass were uniformly mixed, collected in a mold made of mullite, and then heat-treated at 1100 ° C. for 2 hours. A crystallized glass plate was prepared.

When the surface of the crystallized glass plate thus produced was polished, a natural marble pattern in which a white part and a translucent milky white part were mixed was obtained.

The precipitated crystals and crystallinity were determined by X-ray diffraction. The average transmittance of the crystalline glass particles after crystallization was measured as follows. First, glass bodies were collected and heat-treated to obtain a crystallized glass plate. Then, a sample having a thickness of 1 mm was prepared from this crystallized glass plate, both surfaces thereof were mirror-polished, and then measured with a spectrophotometer in a measurement area of 10 × 15 mm in a wavelength range of 300 to 700 nm.

(Example 2) The crystalline glass particles produced in Example 1 and 0.5% by weight of Ca-Si- contained therein.
The Sn-Cr type inorganic pigment was mixed and the inorganic pigment was made to adhere to the surface of the crystalline glass body. Next, 60% by weight of the crystalline glass particles were uniformly mixed with 40% by weight of the crystallized glass crushed product prepared in Example 1.

Next, a crystallized glass plate was prepared by collecting these mixtures in a mullite mold and heat-treating at 1100 ° C. for 2 hours.

When the surface of the crystallized glass plate thus produced was polished, it had a natural stone-like appearance in which a light pink part and a translucent milky white part were mixed.

[0024]

As described above, the patterned crystallized glass obtained by the method of the present invention has a natural stone-like appearance, and at least a part thereof has a light-transmitting property. Patterned crystallized glass has an attractive appearance and meets the demand for diversification of building materials.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takehiro Shibuya 2-7-1 Harashirashi, Otsu-shi, Shiga Nihondenki Glass Co., Ltd. (72) Inventor Takashi Sakane 2-7-1 Harashirashi, Otsu-shi, Shiga Prefecture (72) Inventor Masanori Moritake, 2-7-1, Harumaran, Otsu City, Shiga Prefecture Inside NIDEC Glass Company, Ltd.

Claims (1)

[Claims] 1. A plurality of crystallized glass particles and a plurality of crystallized glass granules each having a property of acicular crystals precipitating from the surface to the inside while softening and deforming when heat-treated at a temperature higher than the softening point. Individually prepared, and then mixed and accumulated in a refractory mold, and then heat-treated to soften and deform each crystalline glass small body to obtain a crystalline glass small body and a crystallized glass coarse crushed product. A method for producing a patterned crystallized glass in which crystals are deposited on each crystalline glass body while being fused and integrated, and a light-transmitting light having an average transmittance of 35% or more in a thickness of 1 mm as a crystallized glass coarse crushed product. A method for producing a patterned crystallized glass, which comprises using a coarsely crushed product of a crystalline glass.