CN107427753A

CN107427753A - Porous plastid, Porous conjugant, molten metal filter, burn till manufacture method with assembly fixture and porous plastid

Info

Publication number: CN107427753A
Application number: CN201580077790.6A
Authority: CN
Inventors: 冈本大; 梶野仁
Original assignee: Mitsui Mining and Smelting Co Ltd
Current assignee: Mitsui Mining and Smelting Co Ltd
Priority date: 2015-03-16
Filing date: 2015-11-25
Publication date: 2017-12-01
Also published as: JP6144817B1; KR20170117171A; WO2016147488A1; JPWO2016147488A1; KR101949072B1; JP2017105707A; JP6117431B2; TW201638049A; TWI691472B

Abstract

The porous plastid of one scheme of embodiment includes the aggregate for the carborundum that average grain diameter is more than 200 μm and the binding material for the carborundum for bonding aggregate.In addition, the average pore diameter of porous plastid is more than 200 μm, the porosity is more than 30 volume %.

Description

Porous plastid, Porous conjugant, molten metal filter, burn till and use assembly fixture And the manufacture method of porous plastid

Technical field

Presently filed embodiment be related to porous plastid, Porous conjugant, molten metal filter, burn till with assembling The manufacture method of frame (jig) and porous plastid.

Background technology

Conventionally, there is known as being formed by carborundum for the particle removing contained by the high-temperature gases such as exhaust is porous The filter of one example of plastid (referring for example to patent document 1,2).

However, for above-mentioned filter, the metal that its metal molten such as being not used as enabling aluminum alloy to obtains melts The molten metal filter that field trash contained by liquid removes.Moreover, above-mentioned filter is in resistance to sudden heating and elevated temperature strength side There is room for improvement in face.

In addition, having known in the past use is burnt till for what is burnt till to ceramic components such as sanitary earthenwares by what carborundum was formed Assembly fixture (referring for example to patent document 3).

Prior art literature

Patent document

Patent document 1：Japanese Unexamined Patent Application 60-255671 publications

Patent document 2：Japanese Unexamined Patent Publication 2-180612 publications

Patent document 3：Japanese Unexamined Patent Application 62-021762 publications

The content of the invention

Invent problem to be solved

In recent years, with regard to electronic unit burn till with etc. kiln furnitures for, as electronic unit minimizes, be rapidly fired into For main flow, thus used can correspond to when burning till further anxious heat, the heat conduction of chilling is good burns till use by what carborundum was formed Assembly fixture.However, above-mentioned can not increase the porosity, therefore burning till in electronic unit by burning till of being formed of carborundum with assembly fixture During can not carry out uniform unsticking mixture process, problem in qualitative control be present.And then such burn till uses assembly fixture There is room for improvement with regard to durability in terms of resistance to sudden heating and elevated temperature strength.

One scheme of embodiment be in view of the above complete, its object is to：Resistance to sudden heating and height are provided The porous plastid of warm excellent strength, Porous conjugant, molten metal filter, burn till with assembly fixture and porous plastid Manufacture method.

The means used to solve the problem

One scheme of embodiment is related to a kind of porous plastid, and it includes the carborundum that average grain diameter is more than 200 μm Aggregate and the carborundum for bonding above-mentioned aggregate binding material.In addition, the average pore diameter of porous plastid is 200 μm More than, the porosity is more than 30 volume %.

Invention effect

According to embodiment scheme, using the teaching of the invention it is possible to provide the porous plastid of resistance to sudden heating and having excellent high-temperature strength, more Hole matter conjugant, molten metal filter, burn till manufacture method with assembly fixture and porous plastid.

Brief description of the drawings

Figure 1A is the explanation figure illustrated to the summary of the manufacture method of the porous plastid of embodiment.

Figure 1B is the explanation figure illustrated to the summary of the manufacture method of the porous plastid of embodiment.

Fig. 2A is the explanation figure illustrated to the molten metal of embodiment with the summary of filter.

Fig. 2 B are Fig. 2A A-A ' sectional views.

Fig. 3 is the flow chart of an example of the manufacture method for the porous plastid for representing embodiment.

Fig. 4 is the flow chart of the first variation of the manufacture method for the porous plastid for representing embodiment.

Fig. 5 is the explanation figure illustrated to the summary of the manufacture method of the porous plastid of embodiment.

Fig. 6 is the flow chart of the second variation of the manufacture method for the porous plastid for representing embodiment.

Fig. 7 is the explanation figure illustrated to the summary of the manufacture method of the porous plastid of embodiment.

Fig. 8 A are to burn till the explanation figure illustrated with the summary of assembly fixture to embodiment.

Fig. 8 B are Fig. 8 A B-B ' sectional views.

Fig. 9 is the sectional view illustrated to the summary of the Porous conjugant of embodiment.

Figure 10 A are the stereograms illustrated to the summary of the Porous conjugant of embodiment.

Figure 10 B are Figure 10 A top views.

Figure 10 C are Figure 10 B C-C ' sectional views.

Embodiment

Hereinafter, referring to the drawings, to porous plastid disclosed in the present application, Porous conjugant, molten metal filter, The embodiment for burning till the manufacture method with assembly fixture and porous plastid is described in detail.In addition, the present invention is not by following The limitation of shown embodiment.

Figure 1A, Figure 1B are the explanation figures illustrated to the summary of the manufacture method of the porous plastid of embodiment.Implement The manufacture method of the porous plastid of mode includes being granulated, is molded, dries and burn till each operation.

First, granulating working procedure is illustrated using Figure 1A.Granulating working procedure is by the Porous for manufacturing embodiment The mixture of the raw material of body come prepare be granulated body process.Specifically, for including the first binding material particle 1 and second The binding material particle 3 of binding material particle 2 is while spraying makes adhesive be dissolved in the medium (liquid medium) of liquid and obtain Lysate while with high-speed stirred, thus prepare and be granulated body 4.It is granulated body 4 and material is bonded with the first binding material particle 1 and second State after material particle 2 is dispersed is granulated.

Here, as the first binding material particle 1 and the second binding material particle 2 for forming binding material particle 3 To be applicable carborundum.In addition, the average grain diameter of the first binding material particle 1 is preferably 0.2 μm~250 μm, more preferably 1 μm~ 100μm。

In addition, the average grain diameter of the second binding material particle 2 can be set as the average grain than the first binding material particle 1 Footpath is big.Specifically, the average grain diameter of the second binding material particle 2 is preferably 0.4 μm~500 μm, more preferably 2 μm~200 μ m.The average grain diameter of the first binding material particle 1 and the second binding material particle 2 is provided by so, can suitably be controlled The size described later for being granulated body 4.Here, " average grain diameter " refers in laser diffraction formula particle size distribution device (damp process) The median diameter (d50) that size distribution based on the volume reference for being scaled equivalent spherical diameter obtains.

In addition, the match ratio for the first binding material particle 1 and the second binding material particle 2 being granulated in body 4 is changed with quality Calculate for example, it can be set to being 10：90~90：10.The first binding material particle 1 and the second binding material are provided by so The match ratio of particle 2, granulation body 4 can be made to be suitable to actual use.

In addition, the liquid for forming the lysate sprayed for the binding material particle 3 stirred by mixed at high speed comminutor is situated between Matter can be applicable the higher medium of volatility.Specifically, water outlet, methanol, ethanol, isopropanol, acetone, acetic acid second can be enumerated Ester etc., but it is not limited to these.In addition, the adhesive for being allowed to be dissolved in liquid medium can be applicable it is relative with the species of liquid medium One or the two or more adhesives answered.Specifically, polyvinyl alcohol (PVA), polyvinyl butyral resin (PVB) can be included With the organic bond such as acrylic resin, but these are not limited to.

In addition, the average grain diameter for being granulated body 4 is preferably 10 μm~500 μm, more preferably 15 μm~300 μm.By so Carry out the average grain diameter that regulation is granulated body 4, the resistance to sudden heating and elevated temperature strength that can make the porous plastid of embodiment improve.

In addition, above-mentioned embodiment is to include the first binding material particle 1 and the second binding material with binding material particle 3 Both particles 2 are illustrated, but can be used only among the first binding material particle 1 and the second binding material particle 2 Any one.

Then, using Figure 1B, to being molded, dry and burn till each operation and illustrate successively.First, molding procedure is carried out Explanation.Molding procedure is to be put into aggregate particle 5 in mould together with above-mentioned granulation body 4 to carry out pressurization compression to make formed body 6 process.Specifically, mixed in a manner of making granulation body 4 and aggregate particle 5 be the ratio set in advance, Jin Ertian Add the polysaccharide such as appropriate dextrin, glucose system's adhesive and water to be kneaded, now surround aggregate particle 5 to be granulated body 4 The mode of surrounding is disperseed.Then, mould (not shown) will be put into comprising the mixture (sun-dried mud brick) for being granulated body 4 and aggregate particle 5, so The after-applied pressure set in advance is pressed, and now can obtain including as shown in Figure 1B stage casing and aggregate particle The formed body 6 in the corresponding space 7 of 5 size and bulk specific weight.

Here, the carborundum that average pore diameter is more than 200 μm can be for example applicable as aggregate particle 5.It is preferred that can So that the purity of carborundum is more than 95%, but not limited to this.In addition, the average grain diameter of aggregate particle 5 be preferably 200 μm~ 5mm, more preferably 300 μm~4mm.By come the average grain diameter of regulation aggregate particle 5, can so make average pore diameter and The porosity is adapted as the actual use of porous plastid.

In addition, the aggregate particle 5 in formed body 6 can be set as example with being granulated the match ratio of body 4 in terms of mass conversion 95：5~70：30.By the way that so come the match ratio of regulation aggregate particle 5 and granulation body 4, average pore diameter and stomata can be made Rate is adapted as the actual use of porous plastid.

Then, drying process is illustrated.Drying process is that the formed body 6 for making to be obtained by above-mentioned molding procedure is dried Process.By such drying process, moisture is removed by formed body 6.In addition, such drying process can also be according to formed body 6 shape, water content are omitted.

Finally, firing process is illustrated.Firing process is following processes：To eliminating water in above-mentioned drying process The process that the formed body 6 divided is burnt till with burning apparatus (not shown).Formed body 6 is embedded in carbon dust and silicon dioxide powder In the mixed-powder at end, the formed body 6 of the state to burying is heated to be allowed to burn till, and is manufactured shown in Figure 1B hypomere Sintered body 11.Above-mentioned sintered body 11 is specifically recrystallized silicon carbide (RSiC).Such sintered body 11 is as needed To implement porous plastid that working process of end etc. forms (hereinafter also referred to " porous plastid 11 ") for example for gold described later Category liquation filter, burn till with purposes such as assembly fixtures.

For formed body 6, when burning till, spread by being granulated carborundum contained by body 4, formed by aggregate particle 5 that This neck 10 bonded.In addition, in Figure 1B, for the ease of understanding by binding material 9 and neck 10 in a manner of Different Individual Represented, but can also be actually integrated into the degree of SEM observation None- identifieds.

In addition, in present embodiment, due to being formed body 6 to be embedded in carbon dust to add carbon source, therefore can promote Enter the evaporation of silicon carbide powder when sintering.In addition, in present embodiment, by making formed body 6 be embedded in carbon dust and dioxy Burnt till in SiClx powder, the growth of neck 10 can be promoted.

In addition, the first binding material particle 1, the second binding material particle 2 and aggregate particle 5 these three particles be respectively with Existing for above-mentioned ratio and size, thus burn till and carry out appropriate, can promote each particle containing carborundum burn till and The generation of neck 10.

Here, the firing temperature in burning apparatus is for example set as more than 2000 DEG C, is preferably set to 2000 DEG C~2500 DEG C burn till formed body 6.Thereby, it is possible to suitably burn till formed body 6.Now, such as preferably in the torpescence gas such as argon, nitrogen Burnt till under body atmosphere.

So, according to the manufacture method of the porous plastid 11 of embodiment, can obtain with the size with aggregate particle 5 It is corresponding aggregate 8, comprising the stomata 12 corresponding with space 7 and corresponding formed with the composition and size with being granulated body 4 Binding material 9 and neck 10 porous plastid 11.By being properly formed neck 10, can obtain straight compared to average pore The porous plastid 11 of resistance to sudden heating and having excellent high-temperature strength for footpath and the porosity.

Then, the porous plastid 11 of embodiment is illustrated.It is more than 200 μm that porous plastid 11, which includes average grain diameter, Carborundum aggregate 8.Here, for the average grain diameter of aggregate 8, specific is, for example, the section of shooting porous plastid 11 SEM(Scanning Electron Microscope；SEM) image, by the SEM image with intercept method to bone The particle diameter of material 8 is measured, and obtains size distribution.

As the mensuration program of specific particle diameter, any line is drawn to SEM image, the aggregate 8 just intersected with the line determines it Major diameter and minor axis.Next, grain shape is set as ellipse, the particle diameter using the average value of major diameter and minor axis as the aggregate 8. Then, multiple SEM images of other visual fields are also shot, said determination is repeated using taken multiple SEM images, it is right The particle diameter of the aggregate 8 of more than 500 is determined, and is obtained afterwards by statistical disposition in the section structure of porous plastid 11 Aggregate 8 average grain diameter.

In addition, porous plastid 11 includes the binding material 9 for the carborundum for bonding aggregate 8.Here, binding material 9 can be with Its difference is confirmed as the tissue different from aggregate 8 by the SEM image in the section of above-mentioned porous plastid 11.

In addition, the average pore diameter of porous plastid 11 is more than 200 μm, preferably 300 μm~2000 μm.In Porous In the case that the average pore diameter of body 11 is less than 200 μm, such as molten metal described later is not suitable as with filter to make With blocking sometimes.In addition, in the case where the average pore diameter of porous plastid 11 is less than 200 μm, such as be also unsuitable for making Burnt till to be described later with assembly fixture to use, temperature deviation is produced in kiln, burnt till so as to make to be placed in sometimes with dress With frame treat that burned material efficiently burns till, efficiently can not carry out unsticking mixture and cause burn till it is bad.Here, " average pore Diameter " refers to：In mercury porosimeter, it is big using the surface tension of mercury and in order that mercury invades the micropore of powder to apply Pressure, hole diameter distribution during similar to cylinder is obtained stomata 12 by pressure and the amount of mercury being pressed into, will be according to the gas The median diameter (d50) that pore diameter distribution obtains is set as average pore diameter.

In addition, the porosity of porous plastid 11 is more than 30 volume %, the volume % of preferably 40 volume %~70.In stomata In the case that rate is less than 30 volume %, the actual use of porous plastid 11 is not suitable as.Here, " porosity " is to calculate as follows 's：Size and quality based on the sample for having used a part for porous plastid 11 or porous plastid 11 calculate density, calculate For the ratio between solid density with carborundum.

In addition, the bulk specific weight of porous plastid 11 is preferably 1.5~2.3, more preferably 1.6~2.0.By making packing ratio Weight is above range, and average pore diameter and the porosity are easy to fall into the proper range suitable for purposes, are adapted as porous plastid 11 actual use.Here, " bulk specific weight " is based on a portion of processing to porous plastid 11 or porous plastid 11 Test film size and quality calculate.

In addition, the content of porous plastid 11 preferred metallic silicon and boron in actual use is below 1 mass %, more preferably Below 0.5 mass %.It is above range by making the content of metallic silicon and boron, the drop of high temperature bend strength described later can be suppressed It is low.In addition, in the case where the porous plastid 11 as is as molten metal filter described later, can further prevent Only filter backward molten metal and spill impurity.Here, the content of metallic silicon and boron refers to the value obtained by x-ray fluorescence analysis.

In addition, the content of the preferred carborundum in actual use of porous plastid 11 is more than 95 mass %, more preferably More than 99%.It is above range by making the content of carborundum, the reduction of high temperature bend strength described later can be suppressed.In addition, In the case where the porous plastid 11 as is as molten metal filter described later, after further can preventing filtering Impurity is spilt to molten metal.Here, " content of carborundum " refers to based on x-ray fluorescence analysis, TC (total carbon) analyses and FC The value that the result of (free carbon) analysis obtains.In addition, even if the content of carborundum also has no problem for more than 99.999%, but need The purity of carborundum in each raw material used in improving, cost rise, so it is not preferred.

In addition, the thermal conductivity of porous plastid 11 is preferably 10W/ (mK)~80W/ (mK) in actual use, it is more excellent Elect 15W/ (mK)~50W/ (mK), more preferably 18W/ (mK)~40W/ (mK) as.When making thermal conductivity to be above-mentioned During scope, in the case where make use of such porous plastid 11 as molten metal filter for example described later, it can press down The temperature of molten metal before and after the logical liquid of system reduces.In addition, the porous plastid 11 make use of to burn till use as example described later In the case of assembly fixture, the temperature deviation in kiln can be reduced, is efficiently burnt till.Here, " thermal conductivity " refers to be based on JISR2616：The thermal conductivity using heat flow method of 1995 defineds determines obtained value.

Hereinafter, using Fig. 2A, Fig. 2 B, the specific Application Example of porous plastid 11 is illustrated.Fig. 2A is to as implementation The explanation figure that the molten metal of one example of the porous plastid 11 of mode is illustrated with the summary of filter, Fig. 2 B are Fig. 2A A-A ' sectional views.

As shown in Fig. 2A, Fig. 2 B, the molten metal filter 110 of embodiment is formed with outer peripheral face 113 The drum component formed with the mode of inner peripheral surface 114.Field trash in molten metal is from outer peripheral face 113 to inner peripheral surface It is collected during 114 circulation molten metals.Moreover, molten metal after cleaning is from the hollow bulb surrounded by inner peripheral surface 114 Divide and discharged to outside.

The molten metal of embodiment is preferably more than 600 μm, more preferably 800 μ comprising average grain diameter with filter 110 The aggregate 8 of m~4mm carborundum.In order that aggregate 8 has above-mentioned average grain diameter, as long as such as the average grain by aggregate particle 5 Footpath is preferably set to more than 600 μm, is more preferably set as 800 μm~4mm just.

In addition, molten metal is preferably 2MPa~15MPa in actual use with the bending strength of filter 110, it is more excellent Elect 3MPa~14MPa as.Here, " bending strength " refers to be based on JISR1601：The three point bending test of 2008 defineds is with normal (5~35 DEG C) of temperature determines what is obtained.More particularly it is：20mm × 10mm is processed into using by molten metal filter 110 Sample obtained from × 50mm cuboid, and implement three point bending test by 30mm of length of span, evaluated to obtain.

In addition, high temperature bend strength of the molten metal filter 110 below 1500 DEG C is preferably in actual use 2MPa~15MPa, more preferably 3MPa~14MPa.By making high temperature bend strength be above range, even if such as more than Molten metal filter 110 is can also act as under 1500 DEG C of higher temperature conditions.Here, " less than 1500 DEG C of high temperature is curved Qu Qiangdu " refers to be based on JISR1604：The three point bending test of 2008 defineds obtains in (1000~1500 DEG C) measure of high temperature 's.More particularly it is：Obtained using the cuboid that molten metal filter 110 is processed into 20mm × 10mm × 120mm The sample arrived, and under 1500 DEG C of air atmosphere implement three point bending test using length of span as 90mm, evaluated to obtain.

In addition, molten metal is preferably 15mm~100mm with the thickness t1 of filter 110, more preferably 20mm~60mm. In the case where thickness t1 is less than 15mm, such as easily trigger deformation, life expectancy shortens sometimes.In addition, it is less than in thickness t1 In the case of 15mm, filtering function can not be given full play to, it is desirable at large catch of field trash of filtering and reach inner peripheral surface 114, have When together with molten metal to hollow space discharge.In addition, melted in the case where thickness t1 is more than 100mm, such as including metal Liquid becomes big with the bodily form of the filter (not shown) of filter 110, is unsuitable for actually using sometimes.

Then, using Fig. 8 A, Fig. 8 B, other Application Examples of the porous plastid 11 of embodiment are illustrated.Fig. 8 A are The explanation figure illustrated with the summary of assembly fixture, Fig. 8 B are burnt till to an example of the porous plastid 11 as embodiment It is Fig. 8 A B-B ' sectional views.

As shown in Fig. 8 A, Fig. 8 B, burning till for embodiment includes having upper surface 211 and lower surface 212 with assembly fixture 210 Substantially rectangular flat of top view burn till with refractory slab 213.Burn till with assembly fixture 210 by more pillars (not shown) so as to burn The mode approximate horizontal into the upper surface 211 with refractory slab 213 supports.Moreover, loaded burning till the upper surface 211 with refractory slab 213 Need sintered body 50,52.

It is such including burning till burning till with assembly fixture 210 so that treating that burned material 50,52 is placed in burns till use with refractory slab 213 The state of the upper surface 211 of refractory slab 213 is configured in kiln (not shown), and burning till for burned material 50,52 is treated in implementation.

Here, it is, for example, electronic unit, the automobile exhaust gas purifying honeycomb knots such as laminated ceramic capacitor to treat burned material 50,52 Structure body.That is, it is above-mentioned burn till can be used for electronic unit with assembly fixture 210, honeycomb structured body is burnt till.In addition, it will be treated in above-mentioned Burned material 50,52 is set as laminated ceramic capacitor, honeycomb structured body, but this is to illustrate to be not intended to limit.That is, treat burned material 50, Can be any species as long as 52 parts burnt till such as chip inductor, semiconductor substrate are just.

Embodiment burn till with assembly fixture 210 comprising average grain diameter be preferably below 3mm, more preferably 600 μm~ The aggregate 8 of 1.8mm carborundum.In order that aggregate 8 has above-mentioned average grain diameter, as long as such as the average grain by aggregate particle 5 Footpath is preferably set to below 3mm, is more preferably set as 600 μm~1.8mm just.

In addition, it is preferably 7MPa~30MPa in actual use to burn till with the bending strength of assembly fixture 210, more preferably 10MPa~25MPa.

In addition, it is preferably 7MPa in actual use to burn till with high temperature bend strength of the assembly fixture 210 below 1500 DEG C ~30MPa, more preferably 10MPa~25MPa.By making high temperature bend strength be above range, even if such as more than 1500 DEG C higher temperature conditions under can also suitably use.

In addition, it is preferably 5mm~30mm to burn till with the thickness t2 of assembly fixture 210, more preferably 7mm~15mm.In thickness In the case that t2 is less than 5mm, such as easily trigger the deformation under high temperature, life expectancy shortens sometimes.In addition, exceed in thickness t2 In the case of 30mm, such as burn till and become big with the bodily form of assembly fixture 210, be unsuitable for actually using sometimes.

In addition, Fig. 8 A, Fig. 8 B show that burning till for embodiment is burnt till with refractory slab 213 with assembly fixture 210 with one piece Example, but can also simultaneously use and be burnt till by more than two pieces of pillar support with refractory slab 213.In addition, Fig. 8 A, Fig. 8 B are shown Make two treat that burned material 50,52 is positioned in one piece of example burnt till with refractory slab 213, but more than one or three can also be made to wait to burn One piece is positioned in into thing to burn till with refractory slab 213.In addition, Fig. 8 A, Fig. 8 B are that porous plastid 11 is carried out with assembly fixture 210 to burn till Explanation, but not limited to this.Among composition burns till each component with assembly fixture 210, as long as such as only burning till with refractory slab 213 by more Composition of hole plastid 11 etc. is burnt till to be made up of just with least a portion among assembly fixture 210 porous plastid 11.In addition, Fig. 8 A, figure In 8B, burn till and be set to that top view is substantially rectangular with the shape of refractory slab 213, but not limited to this.That is, the top with refractory slab 213 is burnt till It can be other shapes such as polygon or circle, ellipse such as square, triangle to regard shape.

In addition, the porous plastid 11 of simple shape of the above-mentioned embodiment to being made up of single structure body is said It is bright, but not limited to this.That is, the multiple porous plastids 11 as above obtained are engaged with grafting material, it is replaced into porous plastid 11 For molten metal filter 110, burn till with assembly fixture 210 etc..With regard to this point, illustrated using Fig. 9~Figure 10 C.It is first First, for an example of the Porous conjugant for engaging multiple porous plastids 11, illustrated using Fig. 9.

Fig. 9 is the sectional view illustrated to the summary of the Porous conjugant of embodiment.As shown in figure 9, embodiment party The Porous conjugant 310 of formula includes first component 311 and second component 312 and bonding layer 313.First component 311 and Two components 312 are made up of the porous plastid 11 of simple shape respectively.Bonding layer 313 is to be clipped in first component 311 and second component Mode between 312 configures, and forms the complex shape for including the first component 311 and second component 312 being made up of porous plastid 11 The Porous conjugant 310 of shape.With for example following making of the Porous conjugant 310 so formed.

Bonding layer 313 by for burnt till the grafting material that first component 311 and second component 312 engage come Formed.That is, the grafting material is kept in a manner of being clipped by first component 311 and second component 312, with first component 311 Burnt till together with second component 312, can now obtain the Porous conjugant 310 for including bonding layer 313.Thereby, it is possible to group Multiple porous plastids 11 with simple shape are closed to form Porous conjugant 310 with complex shape.Now, engaging In the case that material includes silicon carbide powder, the generation of crackle, stripping in bonding part etc. is suppressed, and can be obtained high-strength The Porous conjugant 310 that degree, the integration of high-fire resistance form, so it is preferred that.

Here, Porous conjugant 310 is further described.Porous conjugant 310 is formed by carborundum The average grain diameter of aggregate is preferably 200 μm~5mm, more preferably 300 μm~4mm.By making the average grain diameter of aggregate to be above-mentioned Scope, it can be ensured that the equal performance with above-mentioned porous plastid 11.Here, aggregate in Porous conjugant 310 is averaged Particle diameter can determine in the same manner as the above method.That is, prepare the Porous conjugant 310 for including bonding layer 313, shoot the section SEM (Scanning Electron Microscope；SEM) image, by the SEM image with intercept method pair The particle diameter of aggregate is measured, and obtains size distribution.

In addition, with regard to the porosity of Porous conjugant 310, average pore diameter, bending strength, high temperature bend strength, lead For heating rate, resistance to sudden heating and heat resisting temperature, preferably have with molten metal filter 110, burn till with assembly fixture 210 etc. The performance corresponding as the purposes for replacing being applicable of porous plastid 11.Here, the porosity of Porous conjugant 310, average Hole diameter, bending strength, high temperature bend strength, thermal conductivity, resistance to sudden heating and heat resisting temperature can use respectively except Center includes making obtained sample beyond bonding layer 313 in a manner of making the identical of porous plastid 11 of size and individual layer, carries out With the bending strength in the porous plastid 11 of individual layer, high temperature bend strength, thermal conductivity, resistance to sudden heating and heat resisting temperature identical Measure, using its result as measured value.In addition, for bending strength, high temperature bend strength so that in the center of length direction Including bonding layer 313, the load maximum deflection load near bonding layer 313.

Then, bonding layer 313 is further illustrated.Bonding layer 313 comprising average grain diameter is preferably less than 500 μm, More preferably 50 μm~300 μm of silicon carbide powder.In order that silicon carbide powder has above-mentioned average grain diameter, such as will engagement The average grain diameter of silicon carbide powder contained by material is preferably set to less than 500 μm, is more preferably set as 50 μm~300 μm. By making the average grain diameter of silicon carbide powder be above range, the generation of crackle, stripping in bonding part etc. is suppressed, energy Access high intensity, the Porous conjugant 310 being integrated of high-fire resistance.In addition, the specific cooperation of grafting material Example is described below.

In addition, the porosity of bonding layer 313 is preferably the volume % of 10 volume %~40.By the stomata for making bonding layer 313 Rate is above range, it can be ensured that the porous plastid 11 to connect with bonding layer 313 connects, such as uses assembly fixture as burning till Out gassing during using becomes good, or due to exist appropriateness stomata and resistance to sudden heating is good.

In addition, the bulk specific weight of bonding layer 313 is preferably 1.9~2.9.By making the bulk specific weight of bonding layer 313 to be upper Scope is stated, the porosity is easy to fall into the proper range suitable for purposes, is able to easily form and is connect suitable for the Porous of actual use Zoarium 310.

In addition, the content of the preferred carborundum in practical of bonding layer 313 is more than 95 mass %, more preferably 99% with On.It is above range by making the content of carborundum, the reduction of high temperature bend strength described later can be suppressed.

In addition, the thickness of bonding layer 313 is preferably 500 μm~3mm.By making the thickness of bonding layer 313 be above range, The generation of the stripping at crackle, joint interface in bonding part etc. is suppressed.In addition, the carbonization in above-mentioned bonding layer 313 The average grain diameter of Si powder can be surveyed by the average grain diameter identical method of the aggregate 8 in the porous plastid 11 with individual layer It is fixed.In addition, the thickness of bonding layer 313 SEM image that can be shot to obtain according to pair cross-section is measured.In addition, bonding layer 313 porosity and the bulk specific weight of bonding layer 313 can pass through the porosity and packing ratio in the porous plastid 11 with individual layer The measure identical method of weight obtains measured value.

Then, to being illustrated suitable for the grafting material for forming bonding layer 313.Such grafting material specifically example Such as comprising 30~70 mass % average grain diameter be 160~240 μm silicon carbide powder A, 5~15 mass % average grain diameter be Silicon carbide powder C, 0.3~0.8 matter that 8~12 μm of silicon carbide powder B, 30~50 mass % average grain diameter are 1~5 μm Measure % average grain diameter be 0.3~0.7 μm graphite, as two kinds of polysaccharide system adhesives 3~7 mass % dextrin and The water of 0.02~0.5 mass % cellulose and 10~20 mass %.So, preferably applicable combination is different using average grain diameter Multiple silicon carbide powders obtained from material as grafting material.These materials are put into stainless steel, stirred using mixing The machine of mixing carrys out uniform stirring, thus obtains above-mentioned grafting material.

The Porous conjugant 310 with complex shape for engaging to obtain using the grafting material so obtained possesses and made For the identical intensity of porous plastid 11 and resistance to sudden heating of single structure body.That is, the crackle at joint interface is not produced, is shelled From etc..In addition, grafting material is not necessarily limited to above-mentioned composition and mixing ratio, as long as intensity and heat-resisting punching required for obtaining The Porous conjugant 310 of hitting property can be any composition and mixing ratio just.

Then, using Figure 10 A~Figure 10 C, to other of the Porous conjugant that engages multiple porous plastids 11 Example illustrates.Figure 10 A are the stereograms illustrated to the summary of the Porous conjugant of embodiment.In addition, Figure 10 B It is Figure 10 A top view, Figure 10 C are Figure 10 B C-C ' sectional views.

As shown in Figure 10 A~Figure 10 C, the Porous conjugant 410 of embodiment includes side plate 411,412,413 and 414 And bottom plate 415.Side plate 411~414 and bottom plate 415 are formed by flat porous plastid 11, and Porous conjugant 410 has The box shape that the upper portion opening for having bottom plate 415 forms.

Porous conjugant 410 is that mutually adjacent component is engaged and integrated across bonding layer.Specifically, as schemed Shown in 10C, side plate 413,414 and bottom plate 415 are connect respectively across the bonding layer 416 obtained by burning till grafting material to be formed Close.Illustrated in addition, though omitting with illustrating, but side plate 411,412 and bottom plate 415 are connect respectively across bonding layer 416 Close.Although in addition, detailed description will be omitted, side plate 411~414 and mutually adjacent component across bonding layer 416 respectively by Engagement.Here, as bonding layer 416, can be applicable with the bonding layer with the above-mentioned identical performance of bonding layer 313.

Such Porous conjugant 410 for example may be used as storage and the field trash contained by molten metal removed into progress clearly The so-called box filter (hereinafter also referred to " box filter 410 ") for the molten metal that clean obtains.

Hereinafter, it is shown with one of the method that box filter 410 removes field trash contained in molten metal Example.First, so that a part for the outside wall surface of side plate 411,412,413 and 414 is impregnated in from the outside of bottom plate 415 i.e. downside The mode of aluminium or other molten metals configures box filter 410.Molten metal is from side plate 411,412,413 and 414, bottom plate 415 and the inward-facing effluent of outer wall of bonding layer 416 lead to, the field trash in molten metal by side plate 411,412,413 and 414, Bottom plate 415 and bonding layer 416 gather.Then, obtained molten metal is cleaned in the internal reservoir of box filter 410.

The molten metal for being stored in box filter 410 utilizes for example as other molding materials of die casting.In addition, The shape and composition of box filter 410 are not limited to those shown in Figure 10 A~Figure 10 C, can be any shape.

Next, using Fig. 3, it is described in detail to manufacturing the method for porous plastid 11 of embodiment.Fig. 3 is to represent Manufacture the flow chart of the processing routine of the porous plastid 11 of embodiment.

As shown in figure 3, first, the first binding material particle 1 will be included and average grain diameter ratio the first binding material particle 1 is big The binding material particle 3 of the second binding material particle 2 mix (step S11).Then, to mixed bonding in step S11 Lysate of the spraying of material granule 3 comprising liquid medium and adhesive, is mixed, is thus granulated (step S12).

Next, the granulation body 4 of the carborundum obtained in step S12 is mixed into (step with the aggregate particle 5 of carborundum S13).Then, to comprising in step S13 it is obtained be granulated body 4 and aggregate particle 5 mixture be kneaded, be put into have with The mould of the corresponding shape of purposes is simultaneously molded (step S14) by compressing.

And then the formed body 6 to being obtained by shaping is dried (step S15), then be embedded in SiO 2 powder and State in carbon dust is burnt till (step S16) to formed body 6.By above each operation, embodiment it is a series of more The manufacture of hole plastid 11 terminates.

In addition, above-mentioned embodiment is carried out to the making example that the granulation body 4 of stirring-granulating method has been applicable as step S12 Explanation, but as long as being that can manufacture the method just not limited to this, such as rotation can also be applied and make that identical is granulated body 4 Grain method, spray drying process etc..

In addition, above-mentioned embodiment is carried out to the making example that the formed body 6 of compressing method has been applicable as step S14 Illustrate, but as long as be the mixture for being put into mould can similarly be pressurizeed, the method that is molded just not limited to this, such as Hydrostatic pressing method of forming etc. can be applicable.

And then the manufacture method of the porous plastid of embodiment is not limited to the above situation.Hereinafter, first, using Fig. 4, figure 5, the first variation of the method for the porous plastid to manufacturing embodiment illustrates.

Fig. 4 is the flow chart for representing to manufacture the processing routine of the porous plastid of embodiment, and Fig. 5 is to the more of embodiment The explanation figure that the summary of the manufacture method of hole plastid illustrates.

As shown in figure 4, first, binding material particle is mixed into (step S21) with decentralized medium.Here, binding material Grain can be applicable and the identical particle of above-mentioned binding material particle 3.That is, it is viscous can both to have included above-mentioned first for binding material particle Both binding material particles 2 of material granule 1 and second are tied, can also only be applicable any one.

In addition, decentralized medium can be applicable the higher liquid medium of volatility.Specifically, can enumerate water outlet, methanol, Ethanol, isopropanol, acetone, ethyl acetate etc., but it is not limited to these.Alternatively, it is also possible to be applicable the species phase made with liquid medium Corresponding one or the two or more organic bonds medium that dissolves to obtain as decentralized medium.As such organic Agent, polyvinyl alcohol (PVA), polyvinyl butyral resin (PVB) and acrylic resin etc. can be specifically exemplified, but be not limited to this A bit.

Then, the slurry 16 obtained in step S21 is cast in aggregate particle 15 and be molded (step S22).Specifically For, as shown in Fig. 5 epimere, the aggregate particle 15 of carborundum is paved among mould (not shown) in advance, by slurry 16 It is cast among the mould, remnants slurry 16 is discharged by mould.It is viscous with slurry 16 on the surface of aggregate particle 15 Property etc. character accordingly form the layer of the slurry 16 with almost impartial thickness, and contacted with adjacent aggregate particle 15 Or close position, slurry 16 and surface tension possessed by the decentralized medium contained by slurry 16 accordingly with other parts phase Than being more attached to thickness (stage casing of reference picture 5).In such manner, it is possible to obtain possessing aggregate particle 15 and the bonding material contained by slurry 16 Expect particle and in formed body 18 of the position of the underfill of slurry 16 formed with space 17.Here, aggregate particle 15 can be fitted With with the above-mentioned identical particle of aggregate particle 5, detailed description will be omitted.

And then the formed body 18 to being obtained by shaping is dried (step S23), then be embedded in SiO 2 powder and State in carbon dust is burnt till (step S24) to formed body 18.Each operation more than, the burning shown in Fig. 5 hypomere The manufacture of adult (porous plastid) 21 terminates.

So, according to the manufacture method of the porous plastid 21 of embodiment, can obtain having big with aggregate particle 15 Small corresponding aggregate 19 and the binding material 20 corresponding with the composition of slurry 16 and include the gas corresponding with space 17 The porous plastid 21 in hole 22.Such porous plastid 21 passes through the bonding that makes densely to remain between adjacent aggregate particle 15 Material granule suitably aids in the bonding of aggregate particle 15, forms the resistance to sudden heating for average pore diameter and the porosity With the porous plastid of having excellent high-temperature strength.

In addition, Fig. 5 hypomere at the position close with adjacent aggregate 19 to being only configured with the Porous of binding material 20 Body 21 is shown, but can also be further to configure binding material 20 in a manner of the part or entirety that cover aggregate 19.

Next, using Fig. 6, Fig. 7, the second variation of the method for the porous plastid to manufacturing embodiment is said It is bright.

Fig. 6 is the flow chart for representing to manufacture the processing routine of the porous plastid of embodiment, and Fig. 7 is to the more of embodiment The explanation figure that the summary of the manufacture method of hole plastid illustrates.

As shown in fig. 6, first, binding material particle, solid-state agent are mixed into (step S31) with decentralized medium.Here, glue Knot material granule is applicable and the particle identical particle used in above-mentioned slurry 16.That is, binding material particle can both include Both above-mentioned first binding material particle 1 and the second binding material particle 2, can also only be applicable any one.

In addition, solid-state agent is for example applicable as known to gelating agent and curing agent one or two or more materials.Tool For body, such as epoxy resin, phenolic resin, Lauxite and more amine system curing agent etc. can be included, but be not limited to these.

In addition, decentralized medium can be applicable and the material identical liquid medium used in above-mentioned slurry 16.It is specific next Say, water outlet, methanol, ethanol, isopropanol, acetone, ethyl acetate etc. can be enumerated, but be not limited to these.

Then, the slurry 26 for making to obtain in step S31 is attached to aggregate particle 25 (step S32).Specifically, for example, when When the slurry 26 is mixed in appropriate proportions with aggregate particle 25, the character such as slurry 26 and viscosity of slurry 26 accordingly with Almost the mode of impartial thickness is attached to the surface of aggregate particle 25.Here, aggregate particle 25 can be applicable and above-mentioned aggregate Particle 5,15 identical particles, detailed description will be omitted.In addition, the match ratio of slurry 26 and aggregate particle 25 example in terms of mass conversion It such as can be set as 10：90~30：70.By come the match ratio of regulation slurry 26 and aggregate particle 25, will can so be averaged Hole diameter and the porosity are set as being adapted as the situation of the actual use of porous plastid.

Then, by make slurry 26 adhere to after aggregate particle 25 be put into mould and be molded (step S33).It is above-mentioned into In type body 24, contacted with adjacent aggregate particle 25 or close position, the binding material particle in slurry 26 is with than other The mode of part attachment much is accordingly moved with surface tension possessed by the decentralized medium contained by slurry 26.By This, obtains the formed body 24 (epimere of reference picture 7) formed with space 27 between the aggregate particle 25 after adhering to slurry 26.

Then, the slurry 26 in the formed body 24 for making to be obtained by shaping solidifies (step S34).Specifically, by with slurry In material 26 species of contained solid-state agent accordingly by spontaneously drying, heating, the appropriate operation such as light irradiation is allowed to occur Effect, the periphery with aggregate particle 25 between adjacent aggregate particle 25 form cure pastes 28 (stage casing of reference picture 7).

And then carry out degreasing (step S35) to making slurry 26 be solidified to form the formed body 24 of cure pastes 28.Specifically For, carried out under the temperature conditionss accordingly set in advance with the species of aggregate particle 25, binding material particle by solid-state The processing that the organic principles such as agent are decomposed and removed.In addition, in such step S35 or above-mentioned step S34, can basis Need to carry out the drying process for removing the moisture in formed body 24.Alternatively, it is also possible to the kind according to organic principles such as solid-state agents Class and use level and omit step S35.

Finally, formed body 24 is burnt till (step S36) with the state being embedded in SiO 2 powder and carbon dust.It is logical The each operation of the above is crossed, the manufacture of the sintered body (porous plastid) 31 shown in Fig. 7 hypomere terminates.

So, according to the manufacture method of the porous plastid 31 of embodiment, can obtain having big with aggregate particle 25 Small corresponding aggregate 29 and the binding material 30 corresponding with the composition of slurry 26 and include the gas corresponding with space 27 The sintered body 31 in hole 32.The sintered body 31 passes through the binding material particle that makes densely to remain between adjacent aggregate particle 25 The bonding of aggregate particle 25 is suitably aided in, is formed compared to average pore diameter and porosity resistance to sudden heating and elevated temperature strength Excellent sintered body.

In addition, Fig. 7 hypomere at the position close with adjacent aggregate 29 to being only configured with the sintered body of binding material 30 31 are shown, but can also be further to configure binding material 30 in a manner of the part or entirety that cover aggregate 29.

In addition, Fig. 9 is porous plastid 11 to be illustrated with first component 311 and second component 312, but the first structure One of part 311 and second component 312 or both can be porous plastid 21, can also be porous plastid 31.

In addition, above-mentioned embodiment burns till the porous plastid of completion to be applicable as first component 311 and second component 312 11 (21,31), them are made to be illustrated with grafting material engagement to form Porous conjugant 310, but Porous conjugant 310 preparation method not limited to this.For example, it is also possible to before corresponding with first component 311 and second component 312 burn till Formed body 6 clips the mode of grafting material to keep, and burns till them, is consequently formed Porous conjugant 310.

As described above, the porous plastid of embodiment include average grain diameter be more than 200 μm carborundum aggregate and The binding material for the carborundum that aggregate is bonded.In addition, average pore diameter be more than 200 μm, the porosity be 30 volume % with On.

Therefore, according to the porous plastid of embodiment, using the teaching of the invention it is possible to provide the Porous of resistance to sudden heating and having excellent high-temperature strength Body.

Embodiment

(embodiment 1)

By silicon carbide powder that 65 mass % average grain diameter is 4 μm, (SiC content is more than 99 mass %；With " first is viscous Knot material granule 1 " is corresponding), 15 mass % average grain diameter be 10 μm silicon carbide powder (SiC content be 99 mass % with On；With " the second binding material particle 2 " is corresponding), 2 mass % organic bond (PVA) and 18 mass % water is with a high speed Mixed granulation machine is mixed and is granulated, and has obtained the granulation body 4 that average grain diameter is 50 μm.

(SiC content is 99 mass % to the silicon carbide powder for the use of mixing and blending machine being 2mm by 75 mass % average grain diameter More than；With " aggregate particle 5 " is corresponding), the 15 mass % resulting polysaccharide system adhesive for being granulated body 4,5 mass % (dextrin) and 5 mass % water stir, and have obtained mixture.Then, to resulting mixture with 0.05 ton/cm²More than Pressure is pressed, and has obtained formed body 6.Then, to formed body 6 to be embedded in the shape in carbon dust and SiO 2 powder State is burnt till in the argon atmospher that sintering temperature is 2300 DEG C, and having obtained the porous plastid 11 that thickness t1 is 25mm, (metal melts Liquid filter 110).

(embodiment 2)

By silicon carbide powder that 80 mass % average grain diameter is 4 μm, (SiC content is more than 99 mass %；With " bonding material Expect that particle 3 " is corresponding), 2 mass % organic bond (PVA) and 18 mass % water with the mixing of mixed at high speed comminutor simultaneously It is granulated, has obtained the granulation body 4 that average grain diameter is 40 μm.

(SiC content is 99 mass % to the silicon carbide powder for the use of mixing and blending machine being 2mm by 75 mass % average grain diameter More than；With " aggregate particle 5 " is corresponding), the 15 mass % resulting polysaccharide system adhesive for being granulated body 4,5 mass % (dextrin) and 5 mass % water stir, and have obtained mixture.Then, to resulting mixture with 0.05 ton/cm²More than Pressure is pressed, and has obtained formed body 6.Then, to formed body 6 to be embedded in the shape in carbon dust and SiO 2 powder State is burnt till in the case where sintering temperature is 2350 DEG C of argon atmospher, and having obtained the porous plastid 11 that thickness t1 is 70mm, (metal melts Liquid filter 110).

(embodiment 3)

By silicon carbide powder that 65 mass % average grain diameter is 4 μm, (SiC content is more than 99 mass %；With " first is viscous Knot material granule 1 " is corresponding), 15 mass % average grain diameter be 10 μm silicon carbide powder (SiC content be 99 mass % with On；With " the second binding material particle 2 " is corresponding), 2 mass % organic bond (PVA) and 18 mass % water is with a high speed Mixed granulation machine is mixed and is granulated, and has obtained the granulation body 4 that average grain diameter is 60 μm.

Using mixing and blending machine, by silicon carbide powder that 75 mass % average grain diameter is 250 μm, (SiC content is 99 matter Measure more than %；With " aggregate particle 5 " is corresponding), 15 mass % it is resulting be granulated body 4,5 mass % polysaccharide system bonds Agent (dextrin) and 5 mass % water stir, and have obtained mixture.Then, to resulting mixture with 0.05 ton/cm²More than Pressure be pressed, obtained formed body 6.Then, to formed body 6 to be embedded in carbon dust and SiO 2 powder State is burnt till in the case where sintering temperature is 2400 DEG C of argon atmospher, has obtained (the metal of porous plastid 11 that thickness t1 is 50mm Liquation filter 110).

(embodiment 4)

By silicon carbide powder that 65 mass % average grain diameter is 4 μm, (SiC content is more than 99 mass %；With " first is viscous Knot material granule 1 " is corresponding), 15 mass % average grain diameter be 10 μm silicon carbide powder (SiC content be 99 mass % with On；With " the second binding material particle 2 " is corresponding), 2 mass % organic bond (PVA) and 18 mass % water is with a high speed Mixed granulation machine is mixed and is granulated, and has obtained the granulation body 4 that average grain diameter is 55 μm.

(SiC content is 99 mass % to the silicon carbide powder for the use of mixing and blending machine being 2mm by 60 mass % average grain diameter More than；With " aggregate particle 5 " is corresponding), the 30 mass % resulting polysaccharide system adhesive for being granulated body 4,5 mass % (dextrin) and 5 mass % water stir, and have obtained mixture.Then, to resulting mixture with 0.05 ton/cm²More than Pressure is pressed, and has obtained formed body 6.Then, to formed body 6 to be embedded in the shape in carbon dust and SiO 2 powder State is burnt till in the case where sintering temperature is 2450 DEG C of argon atmospher, and having obtained the porous plastid 11 that thickness t1 is 18mm, (metal melts Liquid filter 110).

(embodiment 5)

By silicon carbide powder that 60 mass % average grain diameter is 4 μm, (SiC content is more than 99 mass %；With " bonding material Material particle " is corresponding), 2 mass % organic bond (PVA) and 38 mass % water mixed with ball mill, obtained slurry 16。

(SiC content is more than 99 mass % to the silicon carbide powder that average grain diameter by 50 mass % is 2mm；With " aggregate Grain 15 " is corresponding) it is paved with the mould on wire netting is placed on.The 50 mass % obtained by said procedure slurry 16 is poured Noting in being paved with aggregate particle 15 in a mold, makes remnants slurry 16 be discharged by the mould on wire netting, resulting in The formed body 18 of the slurry 16 of the mass % of aggregate particle 15 and 20 containing 80 mass %.Dried making resulting formed body 18 Afterwards, burnt till using the state being embedded in carbon and silica in the case where sintering temperature is 2250 DEG C of argon atmospher, obtained thickness T1 is 30mm porous plastid 21 (molten metal filter 110).

(embodiment 6)

By silicon carbide powder that 75 mass % average grain diameter is 4 μm, (SiC content is more than 99 mass %；With " bonding material Expect particle " it is corresponding), 1 mass the % gelating agent (epoxy resin) as solid-state agent, 1 mass % curing agent (polyamines Be curing agent) and 23 mass % water mixed with ball mill, obtained slurry 26.

Then, the use of mixing and blending machine is 2mm by the average grain diameter of 25 mass % resulting slurry 26,75 mass % Silicon carbide powder (SiC content is more than 99 mass %；With " aggregate particle 25 " is corresponding) mixing, slurry 26 is attached to bone The surface of material particle 25.

Aggregate particle 25 after adhering to slurry 26 is put into mould, has obtained formed body 24.Gained is carried out with 80 DEG C The drying of the formed body 24 arrived and the solidification of slurry 26, then with the argon gas of the state that is embedded in carbon and silica at 2300 DEG C Burnt till under atmosphere, obtained the porous plastid 31 (molten metal filter 110) that thickness t1 is 25mm.

(embodiment 7)

In addition to changing the shape of formed body 6, by method same as Example 1, it is 12mm to have obtained thickness t2 Porous plastid 11 (burning till with assembly fixture 210).

(embodiment 8)

In addition to changing the shape of formed body 6, by method same as Example 2, it is 30mm to have obtained thickness t2 Porous plastid 11 (burning till with assembly fixture 210).

(embodiment 9)

In addition to changing the shape of formed body 6, by method same as Example 3, it is 15mm to have obtained thickness t2 Porous plastid 11 (burning till with assembly fixture 210).

(embodiment 10)

In addition to changing the shape of formed body 6, by method same as Example 4, it is 6mm's to have obtained thickness t2 Porous plastid 11 (is burnt till with assembly fixture 210).

(embodiment 11)

In addition to changing the shape of formed body 18, by method same as Example 5, it is 16mm to have obtained thickness t2 Porous plastid 21 (burning till with assembly fixture 210).

(embodiment 12)

In addition to changing the shape of formed body 24, by method same as Example 6, it is 10mm to have obtained thickness t2 Porous plastid 31 (burning till with assembly fixture 210).

(embodiment 13)

Silicon carbide powder that 50 mass % average grain diameter is 200 μm, 10 mass % are averaged using mixing and blending machine Silicon carbide powder that silicon carbide powder that particle diameter is 10 μm, 40 mass % average grain diameter are 5 μm, 0.5 mass % average grain Footpath be 0.5 μm graphite, the 5 mass % dextrin as two kinds of polysaccharide system adhesives and 0.1 mass % cellulose and 20 mass % water stirring, has obtained grafting material.

Then, the porous plastid 11 of two tabulars is prepared in advance (with being burnt till as made from embodiment 7 with the phase of assembly fixture 210 When), the grafting material obtained by being coated with to the surface of a porous plastid 11 with brush, make to be coated with the face of grafting material with it is another The surface of one porous plastid 11 is overlapping and crimps.Then, to two porous plastids 11 for clipping grafting material to be embedded in carbon dust State in end and SiO 2 powder is burnt till in the argon atmospher that sintering temperature is 2300 DEG C, has obtained having more than two The structure that hole plastid 11 (suitable with first component 311 and second component 312) is engaged in a manner of clipping bonding layer 313 Porous conjugant 310.

(comparative example 1)

Using mixing and blending machine, by silicon carbide powder that 75 mass % average grain diameter is 150 μm, (SiC content is 99 matter Measure more than %；With " aggregate particle 5 " is corresponding), the silicon carbide powder (SiC content 99 that 10 mass % average grain diameter is 4 μm More than quality %；With " the first binding material particle 1 " is corresponding), the silicon carbide powder that 5 mass % average grain diameter is 10 μm (SiC content is more than 99 mass %；With " the second binding material particle 2 " is corresponding), 5 mass % organic bond (dextrin) Stirred with 5 mass % water, obtained mixture.

Then, to resulting mixture with 0.05 ton/cm²Pressure above is pressed, and has obtained formed body 6.Then, to formed body 6 to be embedded in the state of carbon dust and SiO 2 powder in sintering temperature as in 2300 DEG C of argon atmospher Burnt till, obtained the sintered body (molten metal filter) that thickness t1 is 30mm.

(comparative example 2)

Then, to resulting mixture with 0.05 ton/cm²Pressure above is pressed, and has obtained formed body 6.Then, to formed body 6 using the state that is embedded in carbon dust and SiO 2 powder in sintering temperature as 2400 DEG C of argon atmospher In burnt till, obtained thickness t1 be 40mm sintered body (molten metal filter).

(comparative example 3)

By silicon carbide powder that 30 mass % average grain diameter is 4 μm, (SiC content is more than 99 mass %；With " first is viscous Knot material granule 1 " is corresponding), 10 mass % average grain diameter be 10 μm silicon carbide powder (SiC content be 99 mass % with On；With " the second binding material particle 2 " is corresponding), the metallic silicon that 40 mass % average grain diameter is 2 μm, 2 mass % it is organic Adhesive (PVA) and 18 mass % water mixes and is granulated with mixed at high speed comminutor, has obtained average grain diameter and be 50 μm making Plastochondria 4.

Using mixing and blending machine, by silicon carbide powder that 80 mass % average grain diameter is 150 μm, (SiC content is 99 matter Measure more than %；With " aggregate particle 5 " is corresponding), 10 mass % it is resulting be granulated body 4,5 mass % polysaccharide system bonds Agent (dextrin) and 5 mass % water stir, and have obtained mixture.Then, to resulting mixture with 0.05 ton/cm²More than Pressure be pressed, obtained formed body 6.Then, to formed body 6 to be embedded in carbon dust and SiO 2 powder State is burnt till in sintering temperature is to 2250 DEG C of argon atmospher, has obtained the sintered body (molten metal that thickness t1 is 20mm With filter).

(comparative example 4)

Except change formed body 6 shape in addition to, by with the identical method of comparative example 1, it is 10mm to have obtained thickness t2 Sintered body (burning till with assembly fixture).

(comparative example 5)

Except change formed body 6 shape in addition to, by with the identical method of comparative example 2, it is 30mm to have obtained thickness t2 Sintered body (burning till with assembly fixture).

(comparative example 6)

Except change formed body 6 shape in addition to, by with the identical method of comparative example 3, it is 15mm to have obtained thickness t2 Sintered body (burning till with assembly fixture).

The average grain diameter of aggregate in each embodiment and comparative example, the porosity, the average pore of porous plastid (sintered body) Diameter, bulk specific weight, bending strength, high temperature bend strength (1500 DEG C), the content of metallic silicon and boron, SiC content, heat conduction Rate, resistance to sudden heating and heat resisting temperature, which collect, is shown in table 1.Here, " resistance to sudden heating " determines as follows.

First, manufactured and porous plastid is burnt till and processed in a manner of as 400mm × 400mm × thickness 30mm Obtained sample.Then, configured on the brick matter setter (setter) of identical size across the pillar for being configured at corner The sample, it is heated at high temperature with electric furnace and keeps the temperature desired by more than 1 hour, then quickly removed and be allowed to from electric furnace Exposed to the air of room temperature, there is flawless to be evaluated in sample with naked eyes.While make design temperature from 300 DEG C of every 50 DEG C of ground It is warming up to 550 DEG C of one side to be evaluated successively, the upper limit for the temperature not cracked is defined as to the value of " resistance to sudden heating ".

In addition, " heat resisting temperature " determines as follows.First, made to porous plastid with as 20mm × 10mm × thickness 120mm mode is burnt till and processes obtained sample.The assembly fixture that the length of span is set as 90mm is arranged in electric furnace, Sample is set to be placed on the assembly fixture.Then, the load suitable with the 50% of normal temperature bending strength is applied to sample center, carried out It is heated at high temperature and keeps the design temperature desired by more than 4 hours, then cools the temperature to room temperature, the flexure to sample is carried out Confirm.The confirmation of flexure is that ruler is ridden over into the length direction of sample and the gap of ruler and sample commented with clearance gauge Valency.Design temperature is set to be warming up to 1700 DEG C while being evaluated successively, by sample breakage or flexure from 800 DEG C of every 50 DEG C of ground Temperature specifications during more than 3mm are the value of " heat resisting temperature ".

In addition, with regard to embodiment 13, the average grain diameter of the silicon carbide powder in bonding layer 313, the thickness of bonding layer 313, connect Close in the entirety of Porous conjugant 310 of the porosity of layer 313 and the bulk specific weight of bonding layer 313 with including bonding layer 313 The average grain diameter of aggregate, the porosity, average pore diameter, bending strength, failure mode, high temperature bend strength (1500 DEG C), height Failure mode, thermal conductivity, resistance to sudden heating and heat resisting temperature under temperature are shown in table 2 together.

In addition, the failure mode of Porous conjugant 310 is to ruinate sample after the evaluation of above-mentioned bending strength Extrude Face observed and according to its destroy position be divided into three classes to have carried out evaluation.Specifically, will destroy by mother metal I.e. situation caused by first component and second component 311,312 is evaluated as mother metal crackle, will destroy the feelings as caused by joint interface Condition is evaluated as Interface Crack, and the situation as caused by bonding layer 313 of destruction is evaluated as into bonding layer crackle.In addition, Porous engages The failure mode of body 310 at high temperature is the destruction pair with above-mentioned Porous conjugant 310 after the evaluation of high temperature bend strength Result has carried out evaluation obtained from pattern is similarly observed.

Table 2

	Embodiment 13
		The aggregate average grain diameter of Porous conjugant	1.99mm
The porosity (volume %) of Porous conjugant	45
		The average pore diameter (μm) of Porous conjugant	491
The bending strength (MPa) of Porous conjugant	8
		Failure mode	Mother metal crackle
The high temperature bend strength (MPa) of Porous conjugant	9
		Failure mode under high temperature	Mother metal crackle
The thermal conductivity (W/ (mK)) of Porous conjugant	15
		The resistance to sudden heating (Δ T) (DEG C) of Porous conjugant	500
The heat resisting temperature (DEG C) of Porous conjugant	1600
		The average grain diameter (μm) of silicon carbide powder in bonding layer	210
The porosity (volume %) of bonding layer	25
		The bulk specific weight of bonding layer	2.40
The SiC content (quality %) of bonding layer	99
		The thickness (mm) of bonding layer	2

Although in addition, eliminate record, just with the only variform embodiment 7 of embodiment 1~6 and comparative example 1~3~ 12 and comparative example 4~6 obtained respectively with above-described embodiment 1~6 and the identical measurement result of comparative example 1~3.

Further effect, variation can easily be exported by those skilled in the art.Therefore, it is of the invention more extensive Scheme be not limited to it is as implied above and described it is specific in detail and representational embodiment.Therefore, do not departing from It can be carried out in the case of the spirit or scope of total inventive concept defined in appended claims and its equivalent Various changes.

Symbol description

1 first binding material particle

2 second binding material particles

3 binding material particles

4 are granulated body

5th, 15,25 aggregate particle

6th, 18,24 formed body

7th, 17,27 space

8th, 19,29 aggregate

9th, 20,30 binding material

10 necks

11st, 21,31 porous plastid (sintered body)

12nd, 22,32 stomata

16th, 26 slurry

28 cure pastes

110 molten metal filters

113 outer peripheral faces

114 inner peripheral surfaces

210 burn till and use assembly fixture

213 burn till and use refractory slab

310 Porous conjugants

410 Porous conjugants (box filter)

Claims

1. a kind of porous plastid, it includes the aggregate for the carborundum that average grain diameter is more than 200 μm and bonds the aggregate Carborundum binding material, its average pore diameter is more than 200 μm, and the porosity is more than 30 volume %.

2. porous plastid according to claim 1, wherein, the content of metallic silicon and boron is below 1 mass %.

3. porous plastid according to claim 1 or 2, its bulk specific weight is 1.5~2.3.

4. according to porous plastid according to any one of claims 1 to 3, wherein, the content of carborundum is more than 95 mass %.

5. according to porous plastid according to any one of claims 1 to 4, wherein, thermal conductivity is 10W/ (mK)~80W/ (m·K)。

6. a kind of Porous conjugant, it possesses multiple porous plastids and the bonding layer for engaging the multiple porous plastid, Wherein, the multiple porous plastid is respectively porous plastid according to any one of claims 1 to 5.

7. a kind of molten metal filter, it includes porous plastid according to any one of claims 1 to 5.

8. a kind of molten metal filter, it includes the Porous conjugant described in claim 6.

9. the molten metal filter according to claim 7 or 8, its bending strength is 2MPa~15MPa.

10. the molten metal filter according to any one of claim 7~9, its high temperature below 1500 DEG C is curved Qu Qiangdu is 2MPa~15MPa.

11. the molten metal filter according to any one of claim 7~10, it has 15mm~100mm thickness Degree.

12. the molten metal filter according to any one of claim 7~11, wherein, the average grain of the aggregate Footpath is more than 600 μm.

13. one kind is burnt till with assembly fixture, it includes porous plastid according to any one of claims 1 to 5.

14. one kind is burnt till with assembly fixture, it includes the Porous conjugant described in claim 6.

15. burning till with assembly fixture, its bending strength according to claim 13 or 14 is 7MPa~30MPa.

16. burning till with assembly fixture, its hot bending below 1500 DEG C according to any one of claim 13~15 Intensity is 7MPa~30MPa.

17. burning till with assembly fixture according to any one of claim 13~16, it has 5mm~30mm thickness.

18. burning till with assembly fixture according to any one of claim 13~17, wherein, the average grain diameter of the aggregate is Below 3mm.

19. a kind of manufacture method of porous plastid, it includes following processes：

Granulating working procedure, the process are granulated to the mixture comprising binding material particle；

Molding procedure, the process to the granulation body of carborundum that the average grain diameter that is obtained by the granulating working procedure is more than 10 μm and Average grain diameter is that the mixture of the aggregate particle of more than 200 μm of carborundum is molded；And

Firing process, the process are burnt till to the formed body obtained by the molding procedure.

20. a kind of manufacture method of porous plastid, it includes following processes：

Mixed processes, the process mix binding material particle with decentralized medium；

Molding procedure, the process by by the slurry cast that the mixed processes obtain in average grain diameter be more than 200 μm of carbonization The aggregate particle of silicon is simultaneously molded；And

21. a kind of manufacture method of porous plastid, it includes following processes：

Mixed processes, the process mix binding material particle, solid-state agent with decentralized medium；

Adhere to process, the process makes to be attached to the carbonization that average grain diameter is more than 200 μm by the slurry that the mixed processes obtain The aggregate particle of silicon；

Molding procedure, the aggregate particle after the process adheres to slurry are put into mould and are molded；

Curing process, the process make the slurry curing in the formed body that is obtained by the molding procedure；And

Firing process, the process are burnt till to the formed body after making slurry curing.

22. the manufacture method of the porous plastid according to any one of claim 19~21, wherein, the binding material Grain includes the second big binding material particle of the first binding material particle described in the first binding material particle and average grain diameter ratio.

23. the manufacture method of the porous plastid according to any one of claim 19~22, wherein, the porous plastid is Molten metal filter.

24. the manufacture method of porous plastid according to claim 23, wherein, the average grain diameter of the aggregate particle is More than 600 μm.

25. the manufacture method of the porous plastid according to any one of claim 19~22, wherein, the porous plastid is Burn till and use assembly fixture.

26. the manufacture method of porous plastid according to claim 25, wherein, the average grain diameter of the aggregate particle is Below 3mm.