CN201297855Y

CN201297855Y - Integrated composite-layer saggar

Info

Publication number: CN201297855Y
Application number: CNU2008202080049U
Authority: CN
Inventors: 曾世平
Original assignee: FOSHAN HONGXIN TECHNOLOGY Co Ltd
Current assignee: FOSHAN HONGXIN TECHNOLOGY Co Ltd
Priority date: 2008-08-18
Filing date: 2008-08-18
Publication date: 2009-08-26
Anticipated expiration: 2018-08-18

Abstract

The utility model discloses an integrated composite-layer saggar, comprising a saggar bottom and a saggar wall; the saggar bottom and the saggar wall at least comprise a substrate and an isolated layer positioned above the substrate for preventing high temperature diffusion of substrate substance to products inside the saggar, and the substrate of the saggar is integrally connected with the substrate of the saggar wall, the isolated layer of the saggar is integrally connected with the isolated layer of the saggar, the substrates use silicon carbide (SiC) material, and the isolated layers use inorganic oxide material. In the utility model, the silicon carbide material of the substrates is extended to the saggar wall from the bottom of the saggar, the strengthen of the saggar wall is increased, thereby avoiding saggar wall fracture and exfoliation such as breakage easily occurring in the use of the saggar and improving the thermal shock resistance of saggar by reasonably mounting expansion joints on the saggar bottom and the saggar wall, thus efficiently prolonging the service life of the sagger and improving the yield of electronic components when sintering.

Description

Integral type composite bed saggar

Technical field

The utility model relates to a kind of kiln furnitures technical field, particularly a kind of saggar that is used to burn till electronic component.

Background technology

In electronic technology field, electronic component, particularly MnZn system, Ni-Zn series electronic component need carry out high temperature sintering in kiln.During sintering, at first need electronic component is put into a special-purpose saggar, enter kiln then, under about 1400 degree temperature, carry out sintering processes.

Produce at present and go up used a kind of saggar, its section as shown in Figure 1,1 comprises a basic unit 4 at the bottom of the casket, this basic unit 4 adopts carborundum (SiC) material to make, for the electronic component in the diffusion couple saggar that prevents carbon atom at high temperature pollutes, need on sic substrate 4, cover one deck separation layer 3, it is an alumina material, also make casket wall 2 with this kind material simultaneously, 2 pairs of electronic components that are placed in the saggar of casket wall play the guardrail effect.

The problem that this saggar exists is, because the linear expansion coefficient of alumina material and the linear expansion coefficient of carbofrax material do not match, make saggar in use " collapsing the angle " and disrumpent feelings phenomenon easily take place owing to the effect of expanding with heat and contract with cold makes the casket wall, thereby the casket wall saggar that comes off is scrapped, not only shortened saggar service life, and the generation of above-mentioned accident in process of production, can damage electronic component by pressure, have a strong impact on yield rate.

The utility model content

Goal of the invention of the present utility model is, a kind of integral type composite bed saggar is provided, and " collapses the angle " and disrumpent feelings problem to solve the casket wall that saggar of the prior art in use takes place.

The integral type composite bed saggar that the utility model provides, comprise at the bottom of the casket and the casket wall, it is characterized in that, at the bottom of the described casket and the casket wall comprise basic unit at least, be used to prevent that basic unit's material High temperature diffusion from burning till product and be arranged on interior separation layer above the described basic unit to saggar, and, the basic unit of basic unit at the bottom of the described casket and described casket wall is connected as a single entity, and the interior separation layer at the bottom of the described casket and the interior separation layer of described casket wall are connected as a single entity, and described basic unit adopts carborundum (SiC) material.Further, the following separation layer that also is provided with of described casket underlayment is outer separation layer, and it is the material of 78%--99% that described inside and outside separation layer adopts aluminum content, the described for example aluminium oxide of aluminium that contains.

Further, the ability of promptly under the condition of rapid heat cycle, not destroying for the thermal shock resistance that effectively improves the saggar carbofrax material, on described saggar, be provided with one or more expansion joint vertical with the saggar edge, this expansion joint is run through at the bottom of described casket wall and the casket, the length at expansion joint is 20% to 25% of the monolateral length of saggar, and, the setting of staggering of the expansion joint on relative two edges.

More specifically, if on every limit, four limits of saggar 1 expansion joint is set, then the intersection point at this expansion joint and edge is located at 25% to 45% place of the every limit of the saggar length of side.Better, in the expansion joint, can fill inorganic oxide material such as high temperature fiber cotton material.

Have, the section configuration of described casket wall can be trapezoidal or rectangle again.When a plurality of saggars stacked use, the corner height of described casket wall should be higher than the height of abutment wall.

The utility model is by extending to the casket wall with basic unit's carbofrax material by the casket bottom, the basic unit and the separation layer that the casket wall are had be connected with one at the bottom of the casket, increased the intensity of casket wall, avoided in use incident disrumpent feelings, the obscissions of casket wall such as " collapsing the angle " of saggar, and by the expansion joint rationally is being set at the bottom of the casket and on the casket wall, improve the thermal shock resistance of saggar, thereby effectively prolonged saggar service life, the yield rate when having improved the electronic component sintering.

Description of drawings

Fig. 1 is the cross-sectional view of the present a kind of saggar that adopts.

Fig. 2 is the cross-sectional view of the utility model one embodiment.

Fig. 3 is the vertical view of the utility model one embodiment.

The specific embodiment

The utility model is described further to Fig. 3 and specific embodiment below in conjunction with Fig. 2.

Fig. 2 is the cross-sectional view of the utility model one embodiment.The saggar that present embodiment provides comprises at the bottom of the casket 11 and casket wall 21, and wherein, 11 are made of interior separation layer 31, basic unit 41 and outer separation layer 5 at the bottom of the described casket, and casket wall 2 is extended upward by 11 interior separation layer 31 at the bottom of the casket and basic unit 41 and forms.

Wherein, the material that constitutes basic unit 41 is a carbofrax material, its advantage be high temperature (1450 ℃) loading capacity is strong, coefficient of thermal expansion is little (1000 ℃ is 0.44% to 0.48%), in use at the bottom of the casket of saggar and the casket wall survivable.The thickness of basic unit 41 is decided according to the size of saggar, is generally 4 to 10 millimeters.

Interior separation layer 31 can adopt various inorganic oxide materials, the most frequently used is alumina material, and its aluminum content can be 78% to 99%, also can adopt derivative such as aluminium nitride, the alumina silicate etc. of aluminium oxide, also can be other oxide according to actual needs, as zirconia etc.The effect of this separation layer is that isolated electronic product is polluted by the carbon that basic unit's carbofrax material disengages in sintering process, and its thickness is generally 2 to 4 millimeters.

In addition, aborning, saggar stacks multilayer usually in kiln, for avoiding the electronic component in lower floor's saggar to be polluted by the carbon atom in the basic unit of upper strata saggar, then the lower surface of 1 basic unit also covers the material that one deck and internal layer play same function at the bottom of casket, promptly form outer separation layer 5, casket wall 21 then only needs to cover one deck alumina material at inner surface and gets final product.

Fig. 3 is the vertical view of the utility model one embodiment one square saggar.In order more effectively to improve the thermal shock resistance of saggar, expansion joint 7 is set around saggar in proportion, the position of intersecting point at itself and saggar edge is located at 25% to 45% place of the every limit of the saggar length of side, is generally 30% or 40% for carbofrax material.The width at expansion joint is 1 to 2 millimeter, and length is 20% to 25% of the monolateral length of saggar, and concrete width and length thickness and the area at the bottom of according to casket decided.Expansion joint 7 is vertical with the saggar edge, and is staggeredly arranged with the expansion joint 7 of opposite side.The utility model can the temperature distortion in use of balance saggar by the expansion joint is set, and prevents the saggar cracking.

Can fill inorganic oxide material such as refractory fiber cotton, fibrofelt, refractory clay etc. in expansion joint 7, the stress that can alleviate place, end, expansion joint is concentrated, and avoids cracking at this place.Also can make the saggar bottom surface more smooth, help putting of electronic component, drop on when using together in that a plurality of saggars are folded, interior granulated slag falls into the quality that lower floor's saggar influences electronic component thereby the filler the expansion joint in can also stop the upper strata saggar.

In addition, the aspect ratio abutment wall 2 in four corners 6 of saggar exceeds 10 to 15 millimeters, makes a plurality of saggars casket wall 2 middle parts when stacking use leave the space, to form thermal convection current, the temperature field is kept evenly.

The section configuration of casket wall 2 is ladder type (referring to Fig. 1), can certainly be other shapes, as circular arc type and rectangle.

Adopt the technical solution of the utility model, with at the bottom of the casket and the casket wall make the composite bed saggar of integral type, efficiently solve " collapsing the angle " and the disrumpent feelings problem of casket wall, make saggar improve 70% than the saggar that adopts aluminium oxide to make the casket wall at present service life, the sintering finished rate of electronic component brings up to 95% by 85%, play prolongation saggar service life, reduced production costs, improved the effect of product quality.

Above embodiment is only unrestricted in order to explanation the utility model; although the utility model is had been described in detail with reference to preferred embodiment; but those of ordinary skill in the art is to be understood that; the modification of under the prerequisite that does not break away from the utility model scope the utility model being carried out or be equal to replacement all should belong within the protection domain of the utility model claim.

Claims

1. integral type composite bed saggar, comprise at the bottom of the casket and the casket wall, it is characterized in that, at the bottom of the described casket and the casket wall comprise basic unit at least, be used to prevent that basic unit's material High temperature diffusion from burning till product and be arranged on above the described basic unit interior separation layer as described saggar inner surface to saggar, and, the basic unit of basic unit at the bottom of the described casket and described casket wall is connected as a single entity, and the interior separation layer at the bottom of the described casket and the interior separation layer of described casket wall are connected as a single entity, and described basic unit adopts carbofrax material.

2. integral type composite bed saggar according to claim 1 is characterized in that, separation layer outside being provided with below the basic unit at the bottom of the described casket.

3. integral type composite bed saggar according to claim 1 and 2 is characterized in that, described separation layer adopts aluminium oxide, aluminium nitride or alumina silicate.

4. integral type composite bed saggar according to claim 1 and 2 is characterized in that, also comprises one or more expansion joint vertical with the saggar edge, and this expansion joint is run through at the bottom of described casket wall and the casket.

5. integral type composite bed saggar according to claim 4 is characterized in that, described expansion joint length is 20% to 25% of the monolateral length of saggar.

6. integral type composite bed saggar according to claim 4, it is characterized in that, on every limit on saggar four limits an expansion joint is set, the intersection point at described expansion joint and edge is located at 25% to 45% place of the every limit of the saggar length of side, and, the setting of staggering of the expansion joint on relative two edges.

7. a kind of integral type composite bed saggar according to claim 4 is characterized in that, fills inorganic oxide material in described expansion joint.

8. integral type composite bed saggar according to claim 1 and 2 is characterized in that the section configuration of described casket wall is trapezoidal or rectangle.

9. a kind of integral type composite bed saggar according to claim 1 and 2 is characterized in that the corner height of described casket wall is higher than the height of abutment wall.