JPH0328143A - Crystalline glass bonded structure and its production - Google Patents

Abstract

PURPOSE:To obtain the subject structure having characteristics suitable for the use as electrical apparatuses or a design effect by boring a hole in a part of a crystallized glass plate and integrating the bored hole with a transparent crystallized glass having a specific linear expansion coefficient. CONSTITUTION:The objective crystalline glass bonded structure is produced by boring a hole in a part of a crystallized glass plate and bonding a transparent crystallized glass having a linear expansion coefficient deviated from that of the crystallized glass plate by +19X10<-7>/ deg.C to -30X10<-7>/ deg.C to the hole using an adhesive for ceramic.

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a crystallized glass plate that is used as a part of an electrical product and is integrated with a transparent body bonded to a perforation provided in a part of a crystallized glass plate. This article relates to adhesive structures and their manufacturing methods. [Prior art] Crystallized glass, which is made up of low-expansion crystals, is a dense crystal and has excellent mechanical strength, thermal shock resistance, chemical resistance, etc. For example, it is used as Neoceram (trade name) for kitchen use. It is widely used in cooking pots, pots, etc., and tableware, but in recent years it has come to be used as parts for the top plates, shelves, etc. of electrical appliances such as microwave ovens and electromagnetic cookers.

[Problem to be solved by the invention] When used as a component of an electrical product, it is used for the purpose of knowing the working content of an electrical device, for example, as a viewing window or display window to indicate that heating is in progress. There was a demand for a board with an integrated transparent body attached to it to add design effects such as decoration or decoration, but there was no crystallized glass board that had a transparent body integrated in some perforations of the board. .

The present invention aims to provide a crystallized glass bonded elliptical body that has characteristics or design effects suitable for use in electrical products, etc., despite having a transparent body in a part of the crystallized glass, and a method for manufacturing the same. Make it a purpose. [Means for Solving the Problems] In order to achieve the above object, the present invention provides a perforation provided in a part of a crystallized glass plate with a linear expansion coefficient of ±10 x 10 with respect to the linear expansion coefficient of the crystallized glass. This is a crystallized glass bonded structure characterized in that transparent crystallized glass having a difference of less than -'/''C is bonded with a ceramic adhesive interposed therebetween.

Further, a perforation is provided in a part of the crystallized glass plate, and the perforation has a coefficient of ±IOX 10 with respect to the linear expansion coefficient of the crystallized glass.
This is a method for producing a bonded crystallized glass structure, characterized in that transparent crystallized glass having a difference within -'/'C is bonded using a ceramic adhesive. [Effects] In the above ellipse, the linear expansion coefficient of transparent crystallized glass is within ±IOX 10-'/'C, so the expansion and contraction due to temperature changes is at most slightly large. Because it is about the circumference of the perforation part? The stress exerted on the ceramic adhesive is relatively small.Although it is desirable that the coefficient of linear expansion of the ceramic adhesive be about the same or lower than that of the glass-ceramic, practical adhesives have a coefficient of linear expansion that is larger than that of the glass-ceramic. The clearance shall be 0.01 to 1.0 mm.
This clearance is preferably 0.2 to 0.4 mm; if it is less than 0.01 mm, the adhesive will be insufficient and the bonding strength will be low; if it exceeds 1.0 mm, the workability will be poor and the adhesive strength will be low. small. The above-mentioned transparent crystallized glass, that is, a transparent body, is a transparent body or a semi-transparent body that exhibits a color such as brown, dark red, or blue, or is colorless. Next, examples and comparative examples will be explained. [Example] The main raw materials for crystallized glass are Li 20, A1■0, , S
iO■ is mixed with crystal nucleus-forming agents such as Zr02 and Ti02 and some additives, melted at a temperature of about 1,700°C, made into a shaped product using a flat plate molding method such as the float method, and gradually removed from distortion. Cool it and use it as raw glass. When this raw glass is heat-treated at a temperature of approximately 900°C, β-quartz type crystals grow and precipitate around the crystal nucleus, resulting in transparent crystallization with a coefficient of linear expansion of -5 to -3 x 10-'/'C. It becomes glass. Furthermore, when heat treated at a temperature of about 1200°C, crystals of β-subodumene grow and precipitate, and the linear expansion coefficient becomes I
It becomes an opaque crystallized glass with a temperature of IXIO-7/℃. Also,
When the heat treatment is finished at the above-mentioned intermediate temperature, for example, 1050°C, l! It is a translucent crystallized glass with an expansion coefficient of 15X10-7/℃. Ejirakin L The thickness of the above-mentioned opaque crystallized glass is approximately 3 mm. U &
Drill holes in several places. On the other hand, a transparent crystallized glass as a transparent body is prepared by cutting to a thickness of about 3 mm and a diameter of about 10 to 40 am. In order to fix and adhere the transparent body to the perforated part, apply ceramic adhesive, e.g.
After coating and drying the coating at a temperature of 0-F/°C to 130 x lO-7/°C, it is cured at a temperature of 150 to 200°C for 1 hour to obtain a crystallized glass bonded structure. The thus obtained crystallized glass bonded structure can withstand practical use, such as in an electromagnetic cooker, which is subjected to repeated temperatures from room temperature to a maximum temperature of 400°C. Civil society 1 The thickness of the above-mentioned opaque crystallized glass is approximately 31II1. Drill four 10φ holes near each corner using a hole-drilling device in a part of a flat plate with length x width 400 x 350 ■. On the other hand, the transparent crystallized glass as a transparent body is cut to prepare a transparent crystallized glass having a thickness of about 3 mw+ and a diameter of about 10 am. In order to fix and adhere the transparent body to the perforated part, the ceramic adhesive of Example 1 was applied to the clearance provided in the range of 0.2 to 0.3 degrees, and after drying,
Cure at 0°C for 1 hour to obtain a crystallized glass bonded structure. The thus obtained crystallized glass bonded structure can be used in microwave oven shelves and can be put to practical use.
Tamasao - 3 - Thickness of the above-mentioned opaque crystallized glass: 4 cm, length x width: 2
00 x 200 - 1 part of the flat plate with a hole punching device, 5
Drill two decorative windows of ~20+anφ. On the other hand, translucent crystallized glass as a transparent body is cut into pieces with a thickness of about 4 mm and a diameter of about 5 to 20 holes. The other parts are the same as those of Example 1, and the part is suitable for practical use as a top plate of an electromagnetic cooker.

For the prepared salmon, use a hole punching device to punch an oval shape with a major axis of 20 mm in one place on a part of the above-mentioned translucent crystallized glass plate with a thickness of 5 mm and dimensions of 300 mm x 200 mm. . On the other hand, the transparent crystallized glass as a transparent body is cut to a thickness of approximately 5 mm.
Prepare an oval shape with a diameter of approximately 20 mm. The rest is the same as Example 1, and the part is suitable for practical use as a top plate for an electromagnetic cooker. [Comparative Example] As a transparent body, a linear expansion coefficient of 32X10-7/''('.
When borosilicate glass was used and other conditions were the same as in Example 1, cracks appeared in the transparent body during the cooling process after treatment at a curing temperature of 200° C. for 1 hour. This is because the transparent body has a large coefficient of linear expansion.

[Effects of the Invention] As described above, the present invention provides an electrical appliance in which a crystallized glass plate is provided with a transparent or translucent crystallized glass, that is, a transparent body in a part of the perforated portion, and is integrated with the crystallized glass plate. This has the effect of providing a crystallized glass bonded structure with good sludge properties and an affine effect for use on top boards, shelves, etc., and a method for manufacturing the same.

Claims (2)

[Claims] (1) A perforation provided in a part of a crystallized glass plate has a linear expansion coefficient of ±10×10^-^7 with respect to the linear expansion coefficient of the crystallized glass.
1. A bonded crystallized glass structure, characterized in that transparent crystallized glass having a temperature difference of less than /°C is bonded with a ceramic adhesive interposed therebetween. (2) A perforated portion is provided in a part of the crystallized glass plate, and the perforated portion has a linear expansion coefficient of ±10×10^ with respect to the linear expansion coefficient of the crystallized glass.
A method for producing a bonded crystallized glass structure, which comprises bonding transparent crystallized glass having a temperature difference within -^7/°C with a ceramic adhesive interposed therebetween.