CN111893375A - Thin-wall stainless steel for three-way pipe fitting and preparation method thereof - Google Patents
Thin-wall stainless steel for three-way pipe fitting and preparation method thereof Download PDFInfo
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
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- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
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- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
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- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
- C22C33/0285—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5% with Cr, Co, or Ni having a minimum content higher than 5%
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
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Abstract
The invention belongs to the technical field of ferrous metallurgy, and particularly relates to thin-wall stainless steel for a three-way pipe fitting and a preparation method thereof. By coating the Zr modified molecular sieve membrane on the surface of the basic stainless steel, the corrosion resistance of the stainless steel in severe environment is greatly improved, and the molecular sieve membrane can be regenerated, so that the resource is saved and the environment is protected. The thin-wall stainless steel with excellent plastic elongation strength and product quality can be obtained by controlling the plate plane anisotropy index delta r of the thin-wall stainless steel to be less than or equal to 0.75; meanwhile, the surface roughness Ra of the stainless steel is controlled to be less than or equal to 0.5, which is beneficial to obtaining the thin-wall stainless steel with excellent surface quality.
Description
Technical Field
The invention relates to the technical field of ferrous metallurgy, in particular to thin-wall stainless steel for a three-way pipe fitting and a preparation method thereof.
Background
The tee pipe fitting is one kind of common pipe element, and is produced through bulging stainless steel pipe, and through plastic stretching of stainless steel material, radial outward expansion of pipe blank of small diameter under pressure and cold extrusion.
The thin-wall stainless steel pipe fitting is widely suitable for pipeline systems for conveying various fluids due to excellent mechanical property, corrosion resistance and lower weight and cost. The chemical stability of stainless steel makes it particularly suitable for use in plumbing systems requiring no contamination of the fluid, such as water supply lines in cities and the like. In China, two industrial standards of a thin-wall stainless steel water pipe and a thin-wall stainless steel clamping and pressing type pipe fitting are released at 24.8.2001 to vigorously popularize the application of the stainless steel thin-wall pipe in the urban water supply system in China. Therefore, the thin-wall stainless steel plays an increasingly prominent role in national life, and therefore, the development of thin-wall stainless steel materials with more excellent performance has become one of the important research directions of technicians in the field.
Disclosure of Invention
The invention aims to provide thin-wall stainless steel with good tensile strength, plastic elongation strength, corrosion resistance and surface quality aiming at the problems in the prior art.
The above object of the present invention can be achieved by the following technical solutions: the thin-wall stainless steel for the three-way pipe fitting is coated with a Zr modified molecular sieve membrane, and is prepared from the following components in percentage by weight: carbon powder is less than or equal to 0.07 percent, chromium powder: 17.5-19.5%, nickel powder: 8-10.5 percent of manganese powder, less than or equal to 2 percent of silicon powder, less than or equal to 0.75 percent of silicon powder, less than or equal to 0.03 percent of S, less than or equal to 0.045 percent of P, less than or equal to 0.1 percent of N, and the balance of iron powder and inevitable impurities.
In order to enhance the corrosion resistance of the thin-wall stainless steel to the environment, only the interaction of alloy elements is very limited, so that a stainless steel product with better corrosion resistance is obtained by preparing a molecular sieve membrane on the surface of the thin-wall stainless steel in the prior art, but the common molecular sieve membrane has weaker binding force with a matrix, so that the molecular sieve membrane peels off and falls off in the use process of the product, the matrix cannot be protected permanently, the service life of the product is greatly shortened, and the resource waste is caused.
Preferably, the thin-walled stainless steel has a plate plane anisotropy index satisfying: Δ r ═ r0+r90-2r45Wherein r is0Is the thickness anisotropy index, r, of the longitudinal specimen90Is the thick anisotropy index, r, of the transverse specimen45Is a thickness anisotropy index forming 45 degrees with the rolling direction, and the plate plane anisotropy index delta r of the thin-wall stainless steel is less than or equal to 0.75. According to the thin-wall stainless steel with excellent plastic elongation strength and product quality, the plate plane anisotropy index delta r cannot exceed 0.75, otherwise, a lug is formed at the edge of a stainless steel elongation piece, the elongation strength of the stainless steel material is reduced, and meanwhile, the utilization rate of the material and the quality of the stainless steel pipe are affected.
Preferably, the surface roughness R of the thin-walled stainless steel isaLess than or equal to 0.5 mu m. Therefore, when the thin-wall stainless steel is used as a three-way fluid pipeline, other substances are not easy to adhere to the surface, the long-term surface stability is kept, polluting escaping substances are not easy to generate, the subsequent reprocessing and finishing of the surface are facilitated, and the better combination with a molecular sieve membrane is facilitated.
The second purpose of the invention is to provide a preparation method of the thin-wall stainless steel for the tee pipe fitting, which comprises the following steps:
s1: dissolving the molecular sieve and the Zr source into a solution I and a solution II respectively by using distilled water, then sequentially adding the solution II and the propyltriethoxysilane into the solution I while stirring, and uniformly mixing to obtain molecular sieve gel for later use;
s2: weighing the stainless steel raw materials according to the weight percentage, ball-milling, and fully mixing to obtain alloy powder;
s3: pressing the alloy powder into a green body, sintering and performing finish machining to obtain a thin-wall stainless steel semi-finished product;
s4: and (3) coating the molecular sieve gel prepared in the S1 on the surface of the stainless steel semi-finished product, and curing at 175-200 ℃ to prepare the thin-wall stainless steel with the surface coated with the Zr modified molecular sieve membrane.
According to the invention, propyl triethoxysilane is added during preparation of the modified molecular sieve gel, and on one hand, propyl triethoxysilane is a good surfactant, so that the surface energy of the gel can be effectively reduced; on the other hand, the interaction of the propyltriethoxysilane and the zirconium source promotes the generation of large particle gel, and under the two actions, the molecular sieve membrane formed on the surface of the matrix has good hydrophobic and renewable properties, and cannot be easily damaged even in a severe environment. In addition, in order to ensure that zirconium is fully contacted with the molecular sieve and enters a molecular sieve framework, the method firstly drops a zirconium source and then drops the propyltriethoxysilane. Meanwhile, the molecular sieve can be solidified into a film only at a proper temperature, when the solidification temperature is lower than 175 ℃, the wettability of the molecular sieve and a matrix is poor, the continuous film forming on the surface of stainless steel is not facilitated, but when the temperature exceeds 200 ℃, the framework structure of the molecular sieve is easy to be unstable, and the molecular sieve film cracks to cause the hydrophobic property to be reduced.
Preferably, the mass percentages of the molecular sieve, the Zr source, the propyltriethoxysilane and the distilled water in the step S1 are respectively 25-35%, 0.8-1.2%, 1.5-4.3% and 60-72%. Compared with the prior art that the alkalinity of the gel is adjusted by adding acid or alkali, the molecular sieve gel with moderate alkalinity can be directly obtained in the mass percentage range, and impurities caused by adding acid or alkali are avoided.
Further preferably, the molecular sieve is a NaY type molecular sieve.
More preferably, the Zr source is Zr (SO)4)2、ZrOCl2、Zr(NO3)4One or more of (a).
Preferably, the molecular sieve gel has a pH of 9.5 to 10.5. The molecular sieve gel prepared in the pH value range has uniform and continuous molecular sieve membrane and high density.
The thin-wall stainless steel obtained by the raw materials and the preparation method has good mechanical property, plastic elongation strength and corrosion resistance, can be widely applied to various fluid three-way pipelines, and is particularly suitable for the three-way pipeline in a water supply system with extremely strict requirements on material properties.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, the Zr modified molecular sieve membrane with uniform and continuous lamellar structure, larger specific surface area and lower surface energy is coated on the surface of the stainless steel, so that the corrosion resistance of the stainless steel in severe environment is greatly improved, and the molecular sieve membrane is renewable, so that the resource is saved and the environment is protected.
2. The invention controls the plate plane anisotropy index delta r of the thin-wall stainless steel to be less than or equal to 0.75, which is beneficial to obtaining the thin-wall stainless steel with excellent plastic elongation strength and product quality; meanwhile, the surface roughness Ra of the stainless steel is controlled to be less than or equal to 0.5 mu m, so that the stability of the stainless steel can be improved, and the stainless steel is also beneficial to combination with a molecular sieve membrane.
3. In the preparation process, the propyl triethoxysilane is added, so that the molecular sieve membrane formed on the surface of the matrix has good hydrophobic and renewable properties, and the molecular sieve membrane cannot be easily damaged even in a severe environment.
Detailed Description
The following are specific examples of the present invention and illustrate the technical solutions of the present invention for further description, but the present invention is not limited to these examples. The raw materials used in the examples of the present invention are those commonly used in the art, and the methods used in the examples are those conventional in the art, unless otherwise specified.
Example 1
Adding NaY type molecular sieve and Zr (SO)4)2Dissolving the mixture into a first solution and a second solution respectively by using distilled water, then sequentially adding the second solution and the propyltriethoxysilane into the first solution while stirring, and uniformly mixing to obtain molecular sieve gel with the pH of 9.5 for later use; wherein, NaY type molecular sieve and Zr (SO)4)2PropyltriethoxyThe mass percentages of the silane and the distilled water are respectively 26%, 0.9%, 2.5% and 70.6%;
according to the weight percentage: carbon powder: 0.02%, chromium powder: 17.6%, nickel powder: 8.3% and manganese powder: 0.72%, silicon powder: 0.75%, S: 0.02%, P: 0.041%, N: weighing stainless steel raw materials with the weight percentage of 0.07 percent and the balance of iron powder and inevitable impurities, and fully ball-milling to obtain mixed powder;
pressing the mixed powder into a green body, sintering and finishing to obtain a thin-wall stainless steel semi-finished product with the plate plane anisotropy index delta r of 0.62 and the surface roughness Ra of 0.41 mu m;
and coating the prepared molecular sieve gel on the surface of a stainless steel semi-finished product, and curing at 175 ℃ to prepare the thin-wall stainless steel with the surface coated with the Zr modified molecular sieve membrane.
The thin-wall stainless steel is machined into a water supply system for the three-way pipeline.
Example 2
Mixing NaY type molecular sieve and Zr (NO)3)4Dissolving the mixture into a solution I and a solution II respectively by using distilled water, then sequentially adding the solution II and the propyltriethoxysilane into the solution I while stirring, and uniformly mixing to obtain molecular sieve gel with the pH of 10.3 for later use; wherein the NaY type molecular sieve and ZrOCl2The mass percentages of the propyl triethoxysilane and the distilled water are respectively 30%, 1.1%, 4.2% and 64.7%;
according to the mass percentage: carbon powder: 0.06%, chromium powder: 19.5%, nickel powder: 10.4% and manganese powder: 1.8%, silicon powder: 0.2%, S: 0.03%, P: 0.044%, N: weighing stainless steel raw materials by 0.1 percent, the balance being iron powder and inevitable impurities, and fully ball-milling to obtain mixed powder;
pressing the mixed powder into a green body, sintering and performing finish machining to obtain a thin-wall stainless steel semi-finished product with the plate plane anisotropy index delta r of 0.75 and the surface roughness Ra of 0.36 mu m;
and coating the prepared molecular sieve gel on the surface of a stainless steel semi-finished product, and curing at 200 ℃ to prepare the thin-wall stainless steel with the surface coated with the Zr modified molecular sieve membrane.
The thin-wall stainless steel is machined into a water supply system for the three-way pipeline.
Example 3
Mixing NaY type molecular sieve and ZrOCl2Dissolving the mixture into a solution I and a solution II respectively by using distilled water, then sequentially adding the solution II and the propyltriethoxysilane into the solution I while stirring, and uniformly mixing to obtain molecular sieve gel with the pH of 9.9 for later use; wherein the NaY type molecular sieve and ZrOCl2The mass percentages of the propyl triethoxysilane and the distilled water are respectively 28%, 1.0%, 3.5% and 67.5%;
according to the mass percentage: carbon powder: 0.05%, chromium powder: 18.3%, nickel powder: 9.5% and manganese powder: 1.3%, silicon powder: 0.46%, S: 0.005%, P: 0.019%, N: weighing stainless steel raw materials by 0.008 percent, the balance of iron powder and inevitable impurities, and fully ball-milling to obtain mixed powder;
pressing the mixed powder into a green body, sintering and finishing to obtain a thin-wall stainless steel semi-finished product with the plate plane anisotropy index delta r of 0.52 and the surface roughness Ra of 0.27 mu m;
and coating the prepared molecular sieve gel on the surface of a stainless steel semi-finished product, and curing at 175 ℃ to prepare the thin-wall stainless steel with the surface coated with the Zr modified molecular sieve membrane.
The thin-wall stainless steel is machined into a water supply system for the three-way pipeline.
Example 4
Dissolving the NaY type molecular sieve and the Zr source into a solution I and a solution II respectively by using distilled water, then sequentially adding the solution II and the propyltriethoxysilane into the solution I while stirring, and uniformly mixing to obtain molecular sieve gel with the pH of 10.1 for later use; wherein the mass percentages of the NaY type molecular sieve, the Zr source, the propyltriethoxysilane and the distilled water are respectively 31 percent, 0.9 percent, 1.8 percent and 66.3 percent, and the Zr source is Zr (NO) with the mass percentage of 35 percent respectively3)4And 65% Zr (SO)4)2Composition is carried out;
according to the mass percentage: carbon powder: 0.04%, chromium powder: 17.9%, nickel powder: 9.2% and manganese powder: 1.1%, silicon powder: 0.6%, S: 0.015%, P: 0.012%, N: weighing stainless steel raw materials by 0.013 percent, the balance of iron powder and inevitable impurities, and fully ball-milling to obtain mixed powder;
pressing the mixed powder into a green body, sintering and finishing to obtain a thin-wall stainless steel semi-finished product with the plate plane anisotropy index delta r of 0.72 and the surface roughness Ra of 0.36 mu m;
and coating the prepared molecular sieve gel on the surface of a stainless steel semi-finished product, and curing at 180 ℃ to prepare the thin-wall stainless steel with the surface coated with the Zr modified molecular sieve membrane.
The thin-wall stainless steel is machined into a water supply system for the three-way pipeline.
Example 5
The only difference from example 3 is that NaY type molecular sieve, Zr (SO)4)2Mixing propyl triethoxy silane and distilled water at one time to prepare the molecular sieve gel.
Example 6
The only difference from example 3 is that no propyltriethoxysilane was added during the preparation of the molecular sieve gel.
Example 7
The only difference from example 3 is that the molecular sieve employed in the preparation of the molecular sieve gel is type a molecular sieve.
Example 8
The only difference from example 3 is that the sheet plane anisotropy index Δ r of the stainless steel semi-finished product obtained after finishing was 0.80.
Example 9
The only difference from example 3 is that the surface roughness Ra of the stainless steel semi-finished product obtained after finishing was 0.55 μm.
Example 10
The difference from example 3 is only that the plate plane anisotropy index Δ r of the stainless steel semi-finished product obtained after finishing was 0.84 and the surface roughness Ra was 0.57 μm.
Comparative example 1
The only difference from example 3 is that the stainless steel surface was not coated with molecular sieve gel.
Comparative example 2
Conventional 316 stainless steel is known in the art.
The performance test indexes of examples 1 to 10 and comparative examples 1 to 2 are shown in Table 1:
table 1: each performance test index of examples 1-10 and comparative examples 1-2
The performance test basis of the thin-wall stainless steel sample in the embodiment of the application is as follows:
GB/T228.1-2010 metallic Material tensile test part 1: room temperature test method
GB/T241-2007 Metal tube Hydraulic test method
GB/T242-2007 Metal tube flaring test method
GB/T244-2008 metal tube bending pressure test method
GB/T245-2016 Metal material tube curling test method
GB/T19228.2-2011 stainless steel clamp-press type pipe fitting assembly part 2: thin-walled stainless steel pipe for connection
Wherein the test standards of the sample part are as follows:
the hydraulic test conditions are as follows: the test pressure is 2.5MPa, and the pressure stabilizing time is 5 s.
Flaring test conditions: the external diameter is less than 60.3mm, 60 cones are adopted, and the wide mouth rate is 30%.
Airtightness test conditions: the gas test pressure is 1.05MPa, and the pipe is completely immersed into water and stabilized for 5 s.
It can be seen from the test data in table 1 that the feeding sequence is changed in the gel preparation process in example 5, and the final product has slight peeling in the corrosion resistance test, i.e. the corrosion resistance is worse than that of example 3 using the technical scheme of the present application; example 6 no propyltriethoxysilane, which plays an important role in molecular sieve gel, was added during the preparation process, the final product had slight peeling in the corrosion resistance test, and the corrosion resistance was inferior to that of example 3; comparative example 1 the corrosion resistance of the product was inferior to that of example 3 when the surface of stainless steel was not subjected to molecular sieve gel coating. Example 7 the corrosion resistance of the product was inferior to that of example 3 due to the use of other types of molecular sieves. Example 8 the plate plane anisotropy index deltar is more than 0.75, which leads to the obvious reduction of the elongation after fracture, the plastic elongation strength and the tensile strength of the product compared with example 3. Example 9 surface roughness Ra >0.5 μm, resulting in delamination burrs on the product surface, which is not desirable. Meanwhile, the performance data of the 316 stainless steel conventionally used in the comparative example 2 are poorer than those of the application, and the application requirements of the three-way pipeline on the thin-wall stainless steel are not met. Therefore, the thin-wall stainless steel obtained by the raw materials and the preparation method has good tensile strength, plastic elongation strength, corrosion resistance and surface quality, and is suitable for the three-way pipeline with extremely strict requirements on material performance in a water supply system.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
While the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope thereof.
Claims (8)
1. The thin-wall stainless steel for the three-way pipe fitting is characterized in that the surface of the thin-wall stainless steel is coated with a Zr modified molecular sieve membrane, and the thin-wall stainless steel is prepared from the following components in percentage by weight: carbon powder is less than or equal to 0.07 percent, chromium powder: 17.5-19.5%, nickel powder: 8-10.5 percent of manganese powder, less than or equal to 2 percent of silicon powder, less than or equal to 0.75 percent of silicon powder, less than or equal to 0.03 percent of S, less than or equal to 0.045 percent of P, less than or equal to 0.1 percent of N, and the balance of iron powder and inevitable impurities.
2. The thin-walled stainless steel of claim 1, wherein the plate planes of the thin-walled stainless steel are eachAnisotropy index△r satisfies:△r＝r0+r90-2r45plane anisotropy index of said thin-walled stainless steel△r≤0.75。
3. The thin-walled stainless steel according to claim 1 or 2, characterized in that the thin-walled stainless steel has a surface roughness Ra≤0.5μm。
4. A method of making a thin-walled stainless steel as claimed in claim 1, characterized in that the method of making comprises the steps of:
s1: dissolving the molecular sieve and the Zr source into a solution I and a solution II respectively by using distilled water, then sequentially adding the solution II and the propyltriethoxysilane into the solution I while stirring, and uniformly mixing to obtain molecular sieve gel for later use;
s2: weighing stainless steel raw materials according to the weight percentage in claim 1, and fully ball-milling to obtain mixed powder;
s3: pressing the mixed powder into a green body, sintering and performing finish machining to obtain a thin-wall stainless steel semi-finished product;
s4: and (3) coating the molecular sieve gel prepared in the S1 on the surface of the stainless steel semi-finished product, and curing at 175-200 ℃ to prepare the thin-wall stainless steel with the surface coated with the Zr modified molecular sieve membrane.
5. The method for preparing a thin-walled stainless steel according to claim 4, wherein the mass percentages of the molecular sieve, the Zr source, the propyl triethoxysilane and the distilled water in the step S1 are respectively 25-35%, 0.8-1.2%, 1.5-4.3% and 60-72%.
6. The method of making a thin-walled stainless steel according to claim 4, wherein the molecular sieve is a NaY type molecular sieve.
7. The method of making a thin-walled stainless steel according to claim 4, wherein the Zr source is Zr (SO)4)2、ZrOCl2、Zr(NO3)4One or more of (a).
8. The method of making a thin-walled stainless steel according to claim 4, wherein the molecular sieve gel has a pH of 9.5 to 10.5.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1285234A (en) * | 1999-08-19 | 2001-02-28 | 中国石油化工集团公司 | Porous stainless steel membrane for supporting molecular sieve and preparation method thereof |
| US20030228969A1 (en) * | 2002-06-11 | 2003-12-11 | Junhang Dong | Method for synthesizing zeolite membranes |
| US20110094380A1 (en) * | 2009-10-28 | 2011-04-28 | Gas Technology Institute | Ultra-thin co2 selective zeolite membrane for co2 separation from post-combustion flue gas |
| CN104144738A (en) * | 2012-02-24 | 2014-11-12 | 三菱化学株式会社 | Porous support-zeolite membrane composite |
| CN104674111A (en) * | 2015-03-07 | 2015-06-03 | 佛山市汇禧建筑五金制品有限公司 | Powder metallurgy sintering gear and application thereof |
| CN104846371A (en) * | 2015-05-13 | 2015-08-19 | 吉林大学 | Method for preparing molecular sieve coating layer on surface of medical magnesium alloy |
-
2020
- 2020-06-16 CN CN202010550831.1A patent/CN111893375B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1285234A (en) * | 1999-08-19 | 2001-02-28 | 中国石油化工集团公司 | Porous stainless steel membrane for supporting molecular sieve and preparation method thereof |
| US20030228969A1 (en) * | 2002-06-11 | 2003-12-11 | Junhang Dong | Method for synthesizing zeolite membranes |
| US20110094380A1 (en) * | 2009-10-28 | 2011-04-28 | Gas Technology Institute | Ultra-thin co2 selective zeolite membrane for co2 separation from post-combustion flue gas |
| CN104144738A (en) * | 2012-02-24 | 2014-11-12 | 三菱化学株式会社 | Porous support-zeolite membrane composite |
| CN104674111A (en) * | 2015-03-07 | 2015-06-03 | 佛山市汇禧建筑五金制品有限公司 | Powder metallurgy sintering gear and application thereof |
| CN104846371A (en) * | 2015-05-13 | 2015-08-19 | 吉林大学 | Method for preparing molecular sieve coating layer on surface of medical magnesium alloy |
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