CN104912006A - Novel structural sound-absorption brick, special mold and preparation method - Google Patents
Novel structural sound-absorption brick, special mold and preparation method Download PDFInfo
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- CN104912006A CN104912006A CN201510273130.7A CN201510273130A CN104912006A CN 104912006 A CN104912006 A CN 104912006A CN 201510273130 A CN201510273130 A CN 201510273130A CN 104912006 A CN104912006 A CN 104912006A
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Abstract
The invention provides a novel structural sound-absorption brick. The novel structural sound-absorption brick comprises a pressure-bearing part (4) and a sound-absorption part (5) which faces to a noise side and is matched with the pressure-bearing part (4), wherein the pressure-bearing part (4) adopts a hollow structure, openings are formed in more than one surface of the pressure-bearing part (4), the sound-absorption part (5) is stuffed to a gap of the pressure-bearing part (4) and forms a sound-absorption structure with a sound-absorption surface with a certain thickness on the noise side. The invention further provides a special mold and a preparation method for preparing the novel structural sound-absorption brick. The mold is simple in structure and high in production efficiency. The preparation method is high in maneuverability, rich in raw material sources and easy to perform industrialized production.
Description
Technical field
The present invention relates to a kind of pavement facilities, particularly relate to a kind of acoustical tile of the new structure for the manufacture of sound barrier, particular manufacturing craft and preparation method for isolating or weaken noise.
Background technology
Sound barrier is arranged on highway, railway or bridge both sides in order to device that is isolated or absorption noise.When bullet train is through out-of-date, its noise, vibration and the wind speed that brought by speed are all very large, all bring certain challenge to the acoustically effective of sound barrier and mechanical strength being positioned at vehicles both sides.Existing sound barrier has metallic sound barrier and non-metal sound barrier two kinds, metallic sound barrier due to cost higher, some section tendency adopts the comparatively cheap non-metal sound barrier of cost.
Non-metal sound barrier can be piled up mutually by acoustical tile and be formed, acoustical tile generally comprises pressure-bearing part and sound-absorbing part, pressure-bearing part is for the formation of support body of wall, sound-absorbing part is used for absorbing and insulating noise, but the pressure-bearing portion compression of the acoustical tile described in prior art is not high, higher height can not be piled into according to demand.In addition, contact area between pressure-bearing part and sound-absorbing part is less, what bond between the two is insecure, year in and year out, vibration and noise environment in, sound-absorbing part and pressure-bearing part easily depart from, and not only affect application life, and the sound-absorbing part be scattered drops to road surface and easily causes traffic accident.
Summary of the invention
The technical problem to be solved in the present invention is: the invention provides a kind of compressive strength large, the acoustical tile that pressure-bearing part and sound-absorbing part not easily depart from, particular manufacturing craft and preparation method.
The present invention will solve this technical problem adopted technical scheme:
A kind of acoustical tile of new structure, it comprise pressure-bearing part and towards noise side the sound-absorbing part matched with described pressure-bearing part described in pressure-bearing part be the hollow-core construction at least one side with opening, a part for described sound-absorbing part is filled in by described opening part in the space of described pressure-bearing part, and remainder exposes described pressure-bearing part and forms the sound absorption construction possessing certain thickness sound absorption face in described noise side.
Preferably, described pressure-bearing part is compact structure, and described sound-absorbing part is the structure with space, and the cross section of described pressure-bearing part is chevron structure or U-shaped structure.
Preferably, described pressure-bearing part is provided with opening on the face of noise side.
Preferably, described pressure-bearing part is provided with opening on the upper surface perpendicular with the face of described noise side.
Preferably, at least arrange a cavity in described acoustical tile inside, described sound absorption face is curved-surface structure.
A kind of particular manufacturing craft of the acoustical tile for the preparation of above-mentioned new structure, it comprises shell, be movably arranged on the placeholder of this enclosure and at least one occupying plate, described shell is class hexahedron structure, it comprises the left surface be connected to each other, right flank, leading flank, trailing flank, upper side and downside, described leading flank is movably connected on described left surface or right flank, described placeholder is possess framework that certain thickness cross section is U-shaped structure or chevron structure and be embedded in described shell, described placeholder bottom surface is flat to be leaned against on described trailing flank, described occupying plate thickness is 0.5 ~ 5cm, time compressing, described occupying plate is folded in described leading flank or between trailing flank and described placeholder, and described occupying plate while withstand the inner side of described downside.
Preferably, described upper side for occupying plate described in curved-surface structure be two, time compressing, above-mentioned two occupying plates be folded between described leading flank and described placeholder respectively and described trailing flank and and described placeholder between.
Preferably, described placeholder is provided with handle, what described occupying plate was detachable is arranged on the medial surface of described leading flank and/or trailing flank.
A preparation method for the acoustical tile of new structure, it comprises the following steps:
1) raw material prepares, and gets the raw material of following weight ratio:
Pressure-bearing part: cement: 30 ~ 50
Yellow sand: 40 ~ 60
Latex powder: 7 ~ 13
Water reducing agent: 1 ~ 3
Water: appropriate
Sound-absorbing part: perlite: 20 ~ 40
Cement: 40 ~ 70
Hydrophober: 0.5 ~ 3
Fiber: 1 ~ 3
Water: appropriate
2) mould prepares: prepare particular manufacturing craft according to above-mentioned mould structure a set of;
3) raw material mixing:
Pressure-bearing part: get cement, yellow sand and suitable quantity of water according to ratio described in step 1) respectively and mix, then add latex powder and water reducing agent, stirs 10 ~ 30min, until mix;
Sound-absorbing part: get perlite, cement and suitable quantity of water according to ratio described in step 1) respectively and mix, then add hydrophober and fiber, stirs 10 ~ 30min, until mix;
3) sound-absorbing part is shaping: by step 2) in the mixed raw material of sound-absorbing part pour in particular manufacturing craft, compressing after concussion 2 ~ 10min, dry;
4) formed product: take out placeholder (2), then pour into described step 2 in the space that placeholder discharges) in the mixed raw material of pressure-bearing part, compressing after concussion 2 ~ 10min, dry;
5) demoulding: by the acoustical tile demoulding comprising sound-absorbing part and pressure-bearing part be bonded together, dry, the i.e. acoustical tile of obtained described new structure.
Preferably, described cement may be selected to be Portland cement or portland slag cement, it is 40 order ~ 70 object washing baked sands that described yellow sand is chosen as particle diameter, described latex powder is polyvinyl acetate latex powder, acrylic compounds latex powder, in butadiene-styrene latex rubber powder wherein one or more, described water reducing agent is naphthalenesulfonate formaldehyde condensation compound, melamine, one or more in polyhydroxycarboxyliacid acid, the expanded perlite of described perlite to be particle diameter be 3 ~ 5mm, described hydrophober is organosilan, one or more in stearate, the polypropylene fibre of described fiber to be diameter be 6mm ~ 12mm, glass fiber, in polyester fiber or carbon fiber one or several.
Beneficial effect of the present invention is: the acoustical tile of new structure of the present invention, it changes to establish pressure-bearing part-structure on the basis of existing acoustical tile structure, effectively prevent and depart from mutually owing to exposing to the weather for a long time between caused sound-absorbing part and pressure-bearing part, greatly improve the stability of acoustical tile quality, prevent because sound-absorbing part is shed to the generation of the traffic accident that road surface is caused.The particular manufacturing craft of the acoustical tile of this new structure of preparation provided by the invention, it is with low cost, and easy-to-use easily de-, production efficiency is high! The preparation method of the acoustical tile of new structure provided by the invention, its abundant raw material source, preparation process easily controls and copies, workable.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the acoustical tile of new structure of the present invention;
Fig. 2 is the overall structure broken away view of the acoustical tile of the first embodiment of the present invention;
Fig. 3 is the overall structure broken away view of the acoustical tile of the second embodiment of the present invention;
Fig. 4 is the overall structure broken away view of the acoustical tile of the third embodiment of the present invention;
Fig. 5 is the cross section structure schematic diagram of acoustical tile of the present invention;
Fig. 6 is that the entirety of acoustical tile particular manufacturing craft splits structural representation.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As depicted in figs. 1 and 2, the present embodiment provides a kind of acoustical tile of new structure, it comprises pressure-bearing part 4 and the sound-absorbing part 5 matched with described pressure-bearing part 4 towards noise side, described pressure-bearing part 4 is the hollow-core construction at least one side with opening, a part for described sound-absorbing part 5 is filled in by described opening part in the space of described pressure-bearing part 4, and remainder exposes described pressure-bearing part 4 and forms the sound absorption construction possessing certain thickness sound absorption face in described noise side.
Pressure-bearing part 4 is compact structure, and possesses certain hardness, can carry the weight of the acoustical tile of the side of being located thereon, and sound-absorbing part 5 is the structure with space, generally selects the raw material casting possessing larger particles to form, such as perlite etc.
As concrete structure choice, the cross section of pressure-bearing part 4 is chevron structure or U-shaped structure, during actual use, the bottom surface of described chevron structure or U-shaped structure is positioned at the back side of noise side, its closely knit structure plays the effect intercepting noise, sound-absorbing part 5 to be filled in the space of pressure-bearing part 4 and to produce side towards noise, and the structure of its porous plays the effect of sound absorption.
Because pressure-bearing part 4 and sound-absorbing part 5 exist different in material, mix in the process of casting for preventing two kinds of materials, therefore secondary forming process must be adopted, the direct result that secondary forming process brings is exactly in conjunction with insecure between pressure-bearing part 4 and sound-absorbing part 5, easily come off year in and year out, for preventing occurring coming off between sound-absorbing part 5 and pressure-bearing part 4, adopt and only on the face of pressure-bearing part 4 towards noise side, be provided with opening 41, sound-absorbing part 5 is filled in expose in the space of pressure-bearing part 4 and by opening 41 and forms sound absorption face.Like this, because sound-absorbing part 5 is embedded in the space of pressure-bearing part 4, in actual use, sound-absorbing part 5 is folded between the top and bottom of pressure-bearing part 4, can not occur obscission again.
As shown in Figures 2 and 3, as concrete structure choice, described pressure-bearing part 4 is provided with opening 41 on the face of noise side, and sound-absorbing part 5 is filled in pressure-bearing part by this opening 41, and a part is exposed this opening 41 and formed sound absorption face.
Alternatively, as shown in Figure 4, also can be provided with opening 41 and 42 in pressure-bearing part 4 on the face of noise side and the upper surface vertical with this face, sound-absorbing part 5 is filled in the space of pressure-bearing part 4, exposes form sound absorption face at the opening part in the face towards noise side.During normal use, opening 42 upward, born by pressure-bearing part, reduces and come off due to the effect of gravity by the weight of such sound-absorbing part 5.
Absorb the frequency range of noise for expanding, described sound absorption face is curved-surface structure, specifically can be triangle, trapezoidal, semicircle, truncated cone-shaped etc., can according to the sound absorption face of concrete specification and actual demand selection different structure.
As shown in Figure 5, for improving acoustically effective further, one cavity 51 is also at least set in described acoustical tile inside, this cavity can be circle, square or other are irregularly shaped, cavity 51 can be one or more, can be separate between each cavity 51, also can interconnect.
As shown in Figure 6, a kind of particular manufacturing craft of the acoustical tile for the preparation of above-mentioned new structure, it comprises shell (1), be movably arranged on the inner placeholder (2) of this shell (1) and at least one occupying plate (3), described shell (1) is class hexahedron structure, it comprises the left surface (11) be connected to each other, right flank (12), leading flank (13), trailing flank (14), upper side (15) and downside (16), described leading flank (13) is movably connected on described left surface (11) or right flank (12), described placeholder (2) is for possessing framework that certain thickness cross section is U-shaped structure or chevron structure and being embedded in described shell (1), described placeholder (2) bottom surface (21) is flat to be leaned against on described trailing flank (16), described occupying plate thickness is 0.5 ~ 5cm, time compressing, described occupying plate (3) is folded in described leading flank (13) or between trailing flank (14) and described placeholder (2), and described occupying plate (3) while withstand the inner side of described downside (16).
Above-mentioned trailing flank 14 can be selected to be fixedly connected with downside 16 with other left surfaces 11 of surrounding, right flank 12, upper side 15, also one piece of bright and clean fixed head can be selected as trailing flank 14, be connected to each other between other sides, during use, the shell of mould be placed on this fixed head.
For sound absorption face of preparing be curved surface novel acoustical tile, the upper side 15 of above-mentioned mould is curved-surface structure, described occupying plate 3 is two, time compressing, above-mentioned two occupying plates 3 are folded between described leading flank 13 and described placeholder 2 and between described trailing flank 14 and described placeholder 2 respectively.Like this when mould molding, this space occupied by two occupying plates 3 all can be filled by the material of pressure-bearing part, avoids sound-absorbing part and pressure-bearing partial exfoliation.
For convenience of the demoulding, described placeholder 2 is provided with handle, handle can be draw ring or handle.When placeholder 2 is taken out by needs from shell 1, rely on handle can facilitate with laborsaving.For convenience of installation and removal, what described occupying plate 3 was detachable is arranged on the medial surface of described leading flank 13 and/or trailing flank 14, and concrete connected mode can be the connected modes such as snapping, hinged or joggle.Like this after sound-absorbing part is shaping, placeholder 2 and occupying plate 3 can be taken out from shell 1 with Free up Memory shaping for pressure-bearing part 4.
Present invention also offers the preparation method of the acoustical tile of above-mentioned new structure, divide 3 embodiments to describe respectively below.
embodiment 1
A preparation method for the acoustical tile of above-mentioned new structure, it comprises the following steps:
1) raw material prepares, and gets the raw material of following weight ratio respectively:
Pressure-bearing part 4: cement: 40
Yellow sand: 50
Latex powder: 8
Water reducing agent: 2
Water: appropriate
Sound-absorbing part 5: perlite: 30
Cement: 68
Hydrophober: 1
Fiber: 1
Water: appropriate
Described cement model may be selected to be Portland cement, portland slag cement etc.; It is 40 order ~ 70 order washing baked sands that described yellow sand is preferably particle diameter; Described latex powder is polyvinyl acetate, wherein one or several compositely form for acrylic compounds, butadiene-styrene latex rubber powder; Described water reducing agent is naphthalenesulfonate formaldehyde condensation compound, one or several in melamine series, polyhydroxycarboxyliacid acid series are composited; The expanded perlite of described perlite to be particle diameter be 3 ~ 5mm; Described hydrophober is Powdered organosilan, stearate one or several be composited; In the polypropylene fibre of described fiber to be diameter be 6mm ~ 12mm, glass fiber, polyester fiber or carbon fiber, one or several are composited.
2) mould prepares: prepare mould according to Special mould structure described above a set of;
3) raw material mixing:
Pressure-bearing part 4: get cement, yellow sand and suitable quantity of water according to ratio described in step 1) respectively and mix, then add latex powder and water reducing agent, stirs 10 ~ 30min, until mix;
Sound-absorbing part 5: get perlite, cement and suitable quantity of water according to ratio described in step 1) respectively and mix, then add hydrophober and fiber, stirs 10 ~ 30min, until mix;
4) sound-absorbing part is shaping: by step 2) in the mixed raw material of sound-absorbing part 5 pour in mould, compressing after concussion 2 ~ 10min, dry;
5) formed product: take out placeholder 2, then pour into described step 2 in the space that placeholder 2 discharges) in the mixed raw material of pressure-bearing part 4, compressing after concussion 2 ~ 10min, dry;
6) demoulding: by the acoustical tile demoulding comprising sound-absorbing part 5 and pressure-bearing part 4 be bonded together, dry, the i.e. acoustical tile of obtained described new structure.
embodiment 2
The preparation method of the acoustical tile of the above-mentioned new structure that the present embodiment provides, it comprises the following steps:
1) raw material prepares, and gets the raw material of following weight ratio:
Pressure-bearing part 4: cement: 30
Yellow sand: 60
Latex powder: 13
Water reducing agent: 1
Water: appropriate
Sound-absorbing part 5: perlite: 40
Cement: 40
Hydrophober: 0.5
Fiber: 3
Water: appropriate
Raw material specification is identical with embodiment 1 with other steps, here no longer repeated description.
embodiment 3
The preparation method of the acoustical tile of the above-mentioned new structure that the present embodiment provides, it comprises the following steps:
1) raw material prepares, and gets the raw material of following weight ratio:
Pressure-bearing part 4: cement: 50
Yellow sand: 40
Latex powder: 7
Water reducing agent: 3
Water: appropriate
Sound-absorbing part 5: perlite: 20
Cement: 55
Hydrophober: 3
Fiber: 1
Water: appropriate
Raw material specification is identical with embodiment 1 with other steps, here no longer repeated description.
Above-described embodiment is further explanation of the present invention, is not limited to the present invention, and all variant embodiment realizing the object of the invention, all within protection scope of the present invention.
Claims (10)
1. the acoustical tile of a new structure, it comprises pressure-bearing part (4) and the sound-absorbing part (5) matched with described pressure-bearing part (4) towards noise side, it is characterized in that, described pressure-bearing part (4) is the hollow-core construction at least one side with opening, a part for described sound-absorbing part (5) is filled in by described opening part in the space of described pressure-bearing part (4), and remainder exposes described pressure-bearing part (4) and forms the sound absorption construction possessing certain thickness sound absorption face in described noise side.
2. the acoustical tile of new structure according to claim 1, is characterized in that, described pressure-bearing part (4) is compact structure, and described sound-absorbing part (5) is the structure with space, and the cross section of described pressure-bearing part (4) is chevron structure or U-shaped structure.
3. the acoustical tile of new structure according to claim 1, is characterized in that, described pressure-bearing part (4) is provided with opening (41) on the face of noise side.
4. the acoustical tile of new structure according to claim 3, is characterized in that, described pressure-bearing part (4) is provided with opening (42) on the upper surface perpendicular with the face of described noise side.
5. acoustical tile according to claim 1, is characterized in that, at least arrange a cavity (51) in described acoustical tile inside, described sound absorption face is curved-surface structure.
6. the particular manufacturing craft for the preparation of the acoustical tile of new structure as claimed in claim 1, it is characterized in that, it comprises shell (1), be movably arranged on the inner placeholder (2) of this shell (1) and at least one occupying plate (3), described shell (1) is class hexahedron structure, it comprises the left surface (11) be connected to each other, right flank (12), leading flank (13), trailing flank (14), upper side (15) and downside (16), described leading flank (13) is movably connected on described left surface (11) or right flank (12), described placeholder (2) is for possessing framework that certain thickness cross section is U-shaped structure or chevron structure and being embedded in described shell (1), described placeholder (2) bottom surface (21) is flat to be leaned against on described trailing flank (16), described occupying plate thickness is 0.5 ~ 5cm, time compressing, described occupying plate (3) is folded in described leading flank (13) or between trailing flank (14) and described placeholder (2), and described occupying plate (3) while withstand the inner side of described downside (16).
7. the particular manufacturing craft of the acoustical tile of new structure according to claim 6, it is characterized in that, described upper side (15) is curved-surface structure, described occupying plate (3) is two, time compressing, above-mentioned two occupying plates are folded between described leading flank (13) and described placeholder (2) and between described trailing flank (14) and described placeholder (2) respectively.
8. the particular manufacturing craft of the acoustical tile of new structure according to claim 6, it is characterized in that, described placeholder (2) is provided with handle, and what described occupying plate (3) was detachable is arranged on the medial surface of described leading flank (13) and/or trailing flank (14).
9. a preparation method for the acoustical tile of new structure as claimed in claim 1, is characterized in that, comprises the following steps:
1) raw material prepares, and gets the raw material of following weight ratio:
Pressure-bearing part (4): cement: 30 ~ 50
Yellow sand: 40 ~ 60
Latex powder: 7 ~ 13
Water reducing agent: 1 ~ 3
Water: appropriate
Sound-absorbing part (5): perlite: 20 ~ 40
Cement: 40 ~ 70
Hydrophober: 0.5 ~ 3
Fiber: 1 ~ 3
Water: appropriate
2) mould prepares: a set of for mould according to Structure Quasi according to claim 7;
3) raw material mixing:
Pressure-bearing part (4): get cement, yellow sand and suitable quantity of water according to ratio described in step 1) respectively and mix, then add latex powder and water reducing agent, stirs 10 ~ 30min, until mix;
Sound-absorbing part (5): get perlite, cement and suitable quantity of water according to ratio described in step 1) respectively and mix, then add hydrophober and fiber, stirs 10 ~ 30min, until mix;
4) sound-absorbing part is shaping: by step 2) in the mixed raw material of sound-absorbing part (5) pour in mould, compressing after concussion 2 ~ 10min, dry;
5) formed product: take out placeholder (2), then pour into described step 2 in the space that placeholder (2) discharges) in the mixed raw material of pressure-bearing part (4), compressing after concussion 2 ~ 10min, dry;
6) demoulding: by the acoustical tile demoulding comprising sound-absorbing part (5) and pressure-bearing part (4) be bonded together, dry, the i.e. acoustical tile of obtained described new structure.
10. the preparation method of the acoustical tile of new structure according to claim 9, it is characterized in that, described cement may be selected to be Portland cement or portland slag cement, it is 40 order ~ 70 object washing baked sands that described yellow sand is chosen as particle diameter, described latex powder is polyvinyl acetate latex powder, acrylic compounds latex powder, in butadiene-styrene latex rubber powder wherein one or more, described water reducing agent is naphthalenesulfonate formaldehyde condensation compound, melamine, one or more in polyhydroxycarboxyliacid acid, the expanded perlite of described perlite to be particle diameter be 3 ~ 5mm, described hydrophober is organosilan, one or more in stearate, the polypropylene fibre of described fiber to be diameter be 6mm ~ 12mm, glass fiber, in polyester fiber or carbon fiber one or several.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510273130.7A CN104912006A (en) | 2015-05-26 | 2015-05-26 | Novel structural sound-absorption brick, special mold and preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510273130.7A CN104912006A (en) | 2015-05-26 | 2015-05-26 | Novel structural sound-absorption brick, special mold and preparation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104912006A true CN104912006A (en) | 2015-09-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510273130.7A Pending CN104912006A (en) | 2015-05-26 | 2015-05-26 | Novel structural sound-absorption brick, special mold and preparation method |
Country Status (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106946586A (en) * | 2016-01-06 | 2017-07-14 | 深圳兰度生物材料有限公司 | Porous bioceramic scaffold and preparation method thereof |
| CN107382168A (en) * | 2017-08-03 | 2017-11-24 | 江苏溧阳建设集团有限公司 | A kind of efficient acoustic tile |
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| JP2000120026A (en) * | 1998-10-19 | 2000-04-25 | Kam:Kk | Sound-absorbing panel |
| JP2003201707A (en) * | 2002-10-07 | 2003-07-18 | Bridgestone Corp | Sound absorptive object and its manufacturing method |
| CN101059020A (en) * | 2007-04-30 | 2007-10-24 | 李艺明 | Wall heat insulation building blocks and production method thereof |
| CN202509419U (en) * | 2011-12-21 | 2012-10-31 | 中铁第四勘察设计院集团有限公司 | High-strength pearl stone sharp-split acoustical tile |
| CN204185785U (en) * | 2014-10-29 | 2015-03-04 | 上海中驰集团有限公司 | Acoustical tile |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000120026A (en) * | 1998-10-19 | 2000-04-25 | Kam:Kk | Sound-absorbing panel |
| JP2003201707A (en) * | 2002-10-07 | 2003-07-18 | Bridgestone Corp | Sound absorptive object and its manufacturing method |
| CN101059020A (en) * | 2007-04-30 | 2007-10-24 | 李艺明 | Wall heat insulation building blocks and production method thereof |
| CN202509419U (en) * | 2011-12-21 | 2012-10-31 | 中铁第四勘察设计院集团有限公司 | High-strength pearl stone sharp-split acoustical tile |
| CN204185785U (en) * | 2014-10-29 | 2015-03-04 | 上海中驰集团有限公司 | Acoustical tile |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106946586A (en) * | 2016-01-06 | 2017-07-14 | 深圳兰度生物材料有限公司 | Porous bioceramic scaffold and preparation method thereof |
| CN106946586B (en) * | 2016-01-06 | 2020-11-27 | 深圳兰度生物材料有限公司 | Porous biological ceramic scaffold and preparation method thereof |
| CN107382168A (en) * | 2017-08-03 | 2017-11-24 | 江苏溧阳建设集团有限公司 | A kind of efficient acoustic tile |
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