TW202035339A - Joining method of ceramic pieces capable of permanently and firmly adhering the ceramic pieces without influencing the appearance - Google Patents

Abstract

Disclosed is a joining method of ceramic pieces, which includes the following steps: firstly, providing a first ceramic piece, a second ceramic piece and a filler, wherein the first ceramic piece and the second ceramic piece have been sintered for densification in advance, and include a first coupling part and a second coupling part, respectively; secondly, coupling the first coupling part of the first ceramic piece and the second coupling part of the second ceramic piece, and filling up the filler between the first coupling part and the second coupling part; and finally, sintering the first ceramic piece, the second ceramic piece and the filler. Accordingly, the present invention arranges coupling parts that are corresponding to each other on two ceramic pieces that are to be joined, and then fills up the filler between the two coupling parts and sinters the two ceramic pieces and the filler, such that, once the two ceramic pieces have been cooled down, the two ceramic pieces will be permanently and firmly adhered without influencing the appearance.

Description

Joining method of ceramic parts

The present invention relates to a method for joining ceramic parts, in particular to a method suitable for permanent joining of multiple ceramic parts.

Traditional ceramic parts are mostly manufactured by casting and drying the mold and then sintering at a high temperature, such as the technology disclosed in the case of my country Patent Publication No. 402555 "Method for Manufacturing Ceramic Ornaments with Densely Short Chamfered Surfaces". However, this traditional method is certainly suitable for mass production, but because of the integrated molding method, after high-temperature sintering and compaction, sometimes due to thermal expansion, it may cause deformation or even squeeze between different parts to break, and this It is also difficult to produce very fine objects.

Furthermore, in the prior art, attachment methods for ceramic parts have been developed. Whether it is attachment to ceramic materials or attachment to heterogeneous materials, most of the prior art uses adhesive attachment methods. However, the bonding method has a short service life and is easily affected by temperature or humidity. In addition, heterogeneous materials are also prone to peeling or cracking at the joint due to different shrinkage and expansion rates due to thermal expansion and contraction. In addition, the adhesive is also prone to aging. In addition, the size of the bonding interface must also be considered at the same time, so it is difficult to apply to fairly fine micro-objects.

On the other hand, although there are physical methods to connect ceramic parts in the prior art, for example, my country Patent Publication No. I548610 "Ceramic Lock Attachment Made by Three-Dimensional Laminates and Its Manufacturing Method"; it embeds the ceramic lock attachment in the ceramic body And one is fired. However, although this method can firmly connect different ceramic pieces, it is still difficult to apply to fairly fine micro-objects.

The main purpose of the present invention is to provide a method of joining ceramic parts, so that the same ceramic parts or different ceramic parts, such as precision ceramics and traditional ceramics, can be permanently joined, and it is quite stable as if it is integrally formed. There is a risk of loosening, and it will not change the overall appearance.

In order to achieve the above object, a method of joining ceramic parts of the present invention includes the following steps: first, a first ceramic part, a second ceramic part, and a filler are provided. The first ceramic part and the second ceramic part are subjected to high temperature The sintering is dense and each includes a first coupling portion and a second coupling portion; then, the first coupling portion of the first ceramic piece is coupled with the second coupling portion of the second ceramic piece, and the filler is filled in the first coupling Between the part and the second coupling part; further, co-fire the first ceramic piece, the second ceramic piece, and the filler.

According to this, in the present invention, a coupling part corresponding to each other is provided on the part to be joined between the two ceramic parts, and filler is filled between the two coupling parts, and the two ceramic parts and the filler are heated and sintered. The ceramic parts will be permanently and firmly bonded without affecting the appearance.

Wherein, the first ceramic piece of the present invention can be a three-dimensional product The precision ceramic parts formed by layer manufacturing are first sintered at a high temperature of 1500℃~1600℃ to be dense; and the second ceramic part can be a traditional ceramic part, which is first sintered at a high temperature of 1200℃~1300℃ to be dense. Accordingly, the present invention can be applied to the joining of different types of ceramic parts, but the present invention is not limited to this, and can also be applied to the joining of similar ceramic parts.

Preferably, the first coupling portion of the present invention may include a pin, the second coupling portion may include a slot, and the pin and the slot are coupled in a loose fit manner. However, the present invention is not limited to this, and any coupling structure that can fix the filler between the first ceramic part and the second ceramic part can be applied to the present invention. In addition, in the present invention, when the plug is coupled to the socket, the gap between the plug and the socket occupies within 30% of the total capacity of the socket, and the gap is used to accommodate the filler.

Furthermore, the temperature of co-firing the first ceramic part, the second ceramic part, and the filler can be between 700°C and 1000°C. That is, the present invention uses low-temperature co-firing to ensure that the appearance and color of the ceramic part will not be affected by the second ceramic part. From time to time, sub-co-fires have undergone changes. In addition, the thermal expansion coefficient of the filler of the present invention can be less than 8 ppm/°C to avoid excessive expansion of the filler due to heat during high-temperature sintering, resulting in displacement of the joint position or angle of the ceramic parts, and excessive expansion of the filler, which affects the appearance.

In addition, the filler of the present invention may include fillers including borosilicate glass between 40 parts by weight and 60 parts by weight, ceramic powder between 20 parts by weight and 40 parts by weight, and water between 15 parts by weight and 30 parts by weight. . Among them, the borosilicate glass may include between 10 parts by weight and 30 parts by weight of feldspar, between 15 parts by weight and 20 parts by weight of quartz, between 6 parts by weight and 10 parts by weight of calcium carbonate, and between 5 parts by weight. Up to 15 weight Parts of boric acid, and between 2 parts by weight and 5 parts by weight of zinc oxide.

In addition, the aforementioned borosilicate glass may further include more than 0 and less than 60 parts by weight of lead oxide, and more than 0 and less than 5 parts by weight of kaolin or clay. In addition, the aforementioned ceramic powder may include at least one of alumina, zirconia powder, and traditional ceramic powder.

2‧‧‧The first ceramic piece

3‧‧‧Second ceramic piece

4‧‧‧Packing

21‧‧‧First coupling part

31‧‧‧Second coupling part

211‧‧‧Latch

311‧‧‧Slot

Figure 1 is a perspective view of a preferred embodiment of the present invention.

Figure 2 is a perspective view of a preferred embodiment of the first ceramic piece of the present invention.

3 is a partial schematic diagram of the first coupling portion of the first ceramic piece and the second coupling portion of the second ceramic piece in a preferred embodiment of the present invention.

4 is a partial schematic diagram of a first ceramic piece and a second ceramic piece after being joined and co-fired in a preferred embodiment of the present invention.

Before the joining method of the ceramic parts of the present invention is described in detail in this embodiment, it should be particularly noted that in the following description, similar components will be represented by the same component symbols. Furthermore, the drawings of the present invention are only for illustrative purposes, and they are not necessarily drawn to scale, and all details are not necessarily presented in the drawings.

Please refer to Figures 1 to 4 at the same time. Figure 1 is a perspective view of a preferred embodiment of the present invention; Figure 2 is a perspective view of a preferred embodiment of the first ceramic piece of the present invention; Figure 3 is a preferred embodiment of the present invention A partial schematic diagram of the first coupling portion of the first ceramic piece and the second coupling portion of the second ceramic piece separated; Figure 4 is the first ceramic piece of a preferred embodiment of the present invention Partial schematic diagram after co-firing with the second ceramic part. The method of this embodiment is detailed as follows:

First, in the first step, a first ceramic piece 2, a second ceramic piece 3, and a filler 4 are provided; among them, the first ceramic piece 2 is a precision ceramic piece formed by three-dimensional layered manufacturing, which is subjected to 1500°C High temperature sintering at ~1600℃ is dense; The second ceramic part 3 is a traditional ceramic part, which is sintered at a high temperature of 1200℃~1300℃ to be dense. In other words, this embodiment particularly presents the bonding of different types of ceramics, that is, the bonding of precision ceramics and traditional ceramics, and is a ceramic piece that has been sintered at a high temperature. In fact, the bonding of these two ceramics is far better than the bonding of the same type of ceramics. Difficult, because the two are not the same regardless of hardness, thermal expansion coefficient, or other characteristics.

Furthermore, the first ceramic piece 2 has a first coupling portion 21, and the second ceramic piece 3 has a second coupling portion 31; in this embodiment, the first coupling portion 21 is a plug 211, and the second coupling portion 31 is A slot 311. Among them, it is worth mentioning that the specific dimensions of the plug 211 and the socket 311 are obtained through computer aided design (CAD/CAM), mainly because the planning and manufacturing of the two dimensions are very important. At that time, the plug 211 may not be inserted into the slot 311, or the gap between the plug 211 and the slot 311 is too large, and the plug 211 cannot be fixed in the slot 311.

In conclusion, a very important parameter in the design of the dimensions of the plug 211 and the socket 311 is the air gap ratio, that is, when the plug 211 is inserted into the socket 311, the gap between the two is a percentage of the total capacity of the socket 311. This parameter is related to the stability of the plug 211 in the slot 311. Constant degree; the greater the porosity, the worse the stability. The reason is as described in the previous paragraph. Because the filler 4 is liquid when it is melted at a high temperature, the plug 211 is easily displaced or deflected. On the other hand, if the porosity is too low, insufficient packing may also occur, or the plug 211 and the socket 311 may be crushed due to different thermal expansion rates. However, the porosity of this embodiment is 5%-30%.

In addition, regarding the filler 4, in the present embodiment, the filler 4 is mainly composed of 40 parts by weight to 60 parts by weight of borosilicate glass, between 20 parts by weight and 40 parts by weight of ceramic powder, and between 15 parts by weight and 30 parts by weight. Consists of parts by weight of water. Wherein, the borosilicate glass includes between 10 parts by weight and 30 parts by weight of feldspar, between 15 parts by weight and 20 parts by weight quartz, between 6 parts by weight and 10 parts by weight calcium carbonate, between 5 parts by weight and 15 parts by weight of boric acid, 2 parts by weight to 5 parts by weight of zinc oxide, 0 and less than 60 parts by weight of lead oxide, and greater than 0 and less than 5 parts by weight of kaolin or clay. Furthermore, the content of lead oxide determines the melting point of borosilicate glass; that is, as the content of lead oxide increases, the melting point of borosilicate glass decreases, so it is suitable for low-temperature co-firing.

In addition, the addition of ceramic powder will be specifically explained, because the filler 4 will be heated and melted and become liquid during co-firing. At this time, the plug 211 may move in the slot 311 because of the liquid filler 4The bolt 211 cannot be fixed. At this time, the ceramic powder plays a very important role, because the ceramic powder can increase the consistency of the filler 4, at least make the filler 4 into a paste shape, so as to avoid the relative displacement of the plug 211 and the slot 311 due to the influence of the flowing filler . However, the addition ratio of the ceramic powder can be appropriately adjusted depending on the other components of the filler 4 and the co-firing temperature, and it should account for 30 weight of the filler 4 as a whole. %the following.

It is also worth mentioning that the filler 4 of this embodiment is specially formulated, and a low thermal expansion coefficient is particularly selected, preferably within 8 ppm/°C, more preferably within 5 ppm/°C. The significance of using the low thermal expansion coefficient filler 4 in this embodiment is to avoid excessive expansion of the filler 4 due to heat during high temperature sintering, resulting in displacement of the joint position or angle of the ceramic parts, and excessive expansion of the filler 4, which affects the appearance; in addition, the low thermal expansion coefficient It can also reduce the influence caused by temperature gradient stress, thereby having stronger fracture resistance.

Then, the second step is to couple the first coupling portion 21 of the first ceramic piece 2 with the second coupling portion 31 of the second ceramic piece 3, even if the plug 211 is inserted into the slot 311, and the filler 4 is filled in the first Between the coupling portion 21 and the second coupling portion 31. However, during the filling process, an ultrasonic vibrator can be additionally used, so that the filler 4 can be completely filled between the plug 211 and the slot 311, so as to prevent the filler 4 from containing cavities and affect the joining effect.

Finally, in the third step, the first ceramic piece 2, the second ceramic piece 3, and the filler 4 are placed in the sintering furnace for co-firing. The co-firing temperature is between 700°C and 1000°C, and the co-firing time is 6~12 hours. The ceramic sintering used in this step is low-temperature sintering, and its main purpose is to prevent the appearance and color of the ceramic parts from being changed due to the second co-firing.

According to the above conclusions, the present invention is characterized by being applicable to the same or different types of ceramic bonding, with extremely high bonding strength, long service life, without affecting appearance, and more importantly, simple manufacturing steps and low cost inexpensive.

The above-mentioned embodiments are merely examples for the convenience of description, and the scope of rights claimed in the present invention should be subject to the scope of the patent application, rather than limited to the above-mentioned embodiments.

2‧‧‧The first ceramic piece

3‧‧‧Second ceramic piece

4‧‧‧Packing

21‧‧‧First coupling part

31‧‧‧Second coupling part

211‧‧‧Latch

311‧‧‧Slot

Claims (10)

A method for joining ceramic pieces includes the following steps: (A) providing a first ceramic piece, a second ceramic piece, and a filler, the first ceramic piece and the second ceramic piece are first sintered at high temperature to be dense, and Each includes a first coupling portion and a second coupling portion; (B) the first coupling portion of the first ceramic piece is coupled with the second coupling portion of the second ceramic piece, and the filler is filled in the Between the first coupling portion and the second coupling portion; and (C) co-fire the first ceramic piece, the second ceramic piece, and the filler. Such as the joining method of ceramic parts of claim 1, wherein the first ceramic part is a precision ceramic part formed by three-dimensional laminated manufacturing, which is first sintered at a high temperature of 1500°C to 1600°C to be dense; the second ceramic part is a Traditional ceramic parts are first sintered at a high temperature of 1200℃~1300℃ to compact. According to the method for joining a ceramic piece of claim 1, wherein the first coupling portion includes a pin, the second coupling portion includes a slot, and the pin and the slot are loosely coupled. For example, the method of joining ceramic parts of claim 3, wherein, in the step (B), when the plug is coupled with the socket, the gap between the plug and the socket accounts for 30% of the total capacity of the socket Within %. Such as the joining method of ceramic parts of claim 1, wherein, in the step (C), the co-firing temperature is between 700°C and 1000°C. Such as the joining method of ceramic parts of claim 1, wherein the thermal expansion coefficient of the filler is 8 ppm/°C or less. The method for joining ceramic parts of claim 1, wherein the filler includes Between 40 and 60 parts by weight of borosilicate glass, between 20 and 40 parts by weight of ceramic powder, and between 15 and 30 parts by weight of water. According to claim 7, the method of joining ceramic parts, wherein the borosilicate glass includes between 10 parts by weight and 30 parts by weight of feldspar, between 15 parts by weight and 20 parts by weight of quartz, and between 6 parts by weight and 10 parts by weight. Parts by weight of calcium carbonate, between 5 parts by weight and 15 parts by weight of boric acid, and between 2 parts by weight and 5 parts by weight of zinc oxide. According to the method for joining ceramic parts of claim 8, wherein the borosilicate glass further comprises more than 0 and less than 60 parts by weight of lead oxide. According to the method for joining ceramic parts of claim 8, wherein the borosilicate glass further comprises kaolin or clay greater than 0 and within 5 parts by weight.

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