CN109593515B - Polycrystalline corundum abrasive and preparation method thereof - Google Patents
Polycrystalline corundum abrasive and preparation method thereof Download PDFInfo
- Publication number
- CN109593515B CN109593515B CN201710944725.XA CN201710944725A CN109593515B CN 109593515 B CN109593515 B CN 109593515B CN 201710944725 A CN201710944725 A CN 201710944725A CN 109593515 B CN109593515 B CN 109593515B
- Authority
- CN
- China
- Prior art keywords
- abrasive
- polycrystalline
- corundum abrasive
- polycrystalline corundum
- corundum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229910052593 corundum Inorganic materials 0.000 title claims abstract description 65
- 239000010431 corundum Substances 0.000 title claims abstract description 65
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000002245 particle Substances 0.000 claims abstract description 25
- 238000005245 sintering Methods 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 16
- 239000011230 binding agent Substances 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 12
- 238000000498 ball milling Methods 0.000 claims abstract description 11
- 238000005469 granulation Methods 0.000 claims abstract description 10
- 230000003179 granulation Effects 0.000 claims abstract description 10
- 230000007797 corrosion Effects 0.000 claims abstract description 9
- 238000005260 corrosion Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000007873 sieving Methods 0.000 claims abstract description 8
- 238000004321 preservation Methods 0.000 claims abstract description 4
- 239000008399 tap water Substances 0.000 claims abstract description 4
- 235000020679 tap water Nutrition 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 14
- 239000003082 abrasive agent Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 10
- 239000003822 epoxy resin Substances 0.000 claims description 7
- 229920000647 polyepoxide Polymers 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000004570 mortar (masonry) Substances 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- 239000012188 paraffin wax Substances 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 229920001721 polyimide Polymers 0.000 claims description 3
- 239000009719 polyimide resin Substances 0.000 claims description 3
- 229920005749 polyurethane resin Polymers 0.000 claims description 3
- 235000019353 potassium silicate Nutrition 0.000 claims description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims 2
- 229920005989 resin Polymers 0.000 claims 1
- 239000011347 resin Substances 0.000 claims 1
- 239000007767 bonding agent Substances 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000009740 moulding (composite fabrication) Methods 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 2
- 235000013339 cereals Nutrition 0.000 description 8
- 239000013078 crystal Substances 0.000 description 6
- 238000000227 grinding Methods 0.000 description 6
- 238000012216 screening Methods 0.000 description 4
- 239000006061 abrasive grain Substances 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005555 metalworking Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 235000020985 whole grains Nutrition 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
- C09K3/1409—Abrasive particles per se
- C09K3/1418—Abrasive particles per se obtained by division of a mass agglomerated by sintering
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
The invention discloses a polycrystalline corundum abrasive which consists of white corundum micro powder and a basic binding agent, wherein the grain diameter of the white corundum micro powder is 0.1-10 mu m, and the mass fraction of the basic binding agent is 2-40 wt.%. The polycrystalline corundum abrasive is obtained by controlling the process parameters such as the content of a basic bonding agent, the size of granulation, the sintering temperature, the heat preservation time and the like and through the processes of uniform mixing, sieving, forming, granulation, sintering and the like, the preparation method is simple, the requirement on instruments is low, the raw material price is relatively cheap, the production cost of the polycrystalline corundum abrasive is greatly reduced, the compressive strength ratio of the obtained polycrystalline corundum abrasive before and after corrosion is determined after the obtained polycrystalline corundum abrasive is soaked in tap water for 100 hours, and the numerical value can reach 58.93 percent at most; the highest ball milling toughness can reach 49.93 percent according to GB/T23538-; the single-particle compressive strength can reach 25-35N, and the highest density of the abrasive can reach 3-3.5g/cm 3.
Description
Technical Field
The invention belongs to the field of inorganic non-metallic materials, and relates to a polycrystalline corundum abrasive and a preparation method thereof.
Background
Abrasives are tools used for grinding, lapping and polishing. Most of the grinding tools are artificial grinding tools made of an abrasive material and a bonding agent. In addition to being widely used in the machine manufacturing and other metal working industries, abrasive tools are also used in the grain processing, paper industry and in the processing of non-metallic materials such as ceramics, glass, stone, plastics, rubber, wood, etc. The abrasive is a sharp and hard material, is used for grinding the surface of a soft material, is an essential material for manufacturing each precision product, and the performance of the abrasive seriously influences the quality of grinding processing.
The traditional common abrasive is usually prepared by adopting an electric smelting method. One abrasive particle of the single crystal abrasive is an abrasive single crystal, and the edge angle of the abrasive is easy to dull during grinding, and the abrasive particles fall off after finishing; different from single crystal abrasive, the polycrystalline abrasive has a microscopic microstructure different from that of the single crystal abrasive, and the abrasive grains are composed of a plurality of tiny crystals, so that the falling mode of the abrasive grains after being stressed and crushed is not whole grain crushing and falling, but a plurality of tiny crystals on each abrasive grain gradually fall off, thereby increasing the self-sharpening property of the abrasive, reducing the maintenance frequency of tools, improving the working state of the abrasive, prolonging the service life of the abrasive, and having simple preparation method and low cost.
Although the polycrystalline corundum abrasive has a plurality of advantages and wide application prospect, the melting point (2050 ℃) of pure alumina is very high, so that the pure alumina is difficult to sinter at low temperature in the preparation process, and the high temperature is easy to cause abnormal growth of grains and destroy performance. Therefore, how to reduce the sintering temperature of the polycrystalline corundum abrasive and maintain the uniformity of the microstructure and the morphology of the polycrystalline corundum abrasive is the key point in the research field of the polycrystalline corundum abrasive.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a polycrystalline corundum abrasive and a preparation method thereof.
The invention is realized by the following technical scheme:
the polycrystalline corundum abrasive material consists of white corundum micro powder and a basic binding agent, wherein the grain diameter of the white corundum micro powder is 0.1-10 mu m, and the mass fraction of the basic binding agent is 2-40 wt.%.
In the technical scheme, the basic bonding agent is epoxy resin, novel phenol resin, polyurethane resin or polyimide resin.
In the technical scheme, the particle size of the white corundum micro powder is preferably 1-2 μm.
In the above technical solution, the mass fraction of the base binder is preferably 25 wt.% to 35 wt.%.
A preparation method of a polycrystalline corundum abrasive material comprises the following steps:
(1) mechanically mixing the white corundum micro powder and the basic bonding agent uniformly;
(2) smashing the mixed material obtained in the step (1) in a mortar, adding a binder for granulation, sieving to screen out particles meeting the particle size requirement, and performing dry pressing and molding by using a press;
(3) and (3) sintering the uniformly mixed material obtained in the step (2) and then cooling to obtain the polycrystalline corundum abrasive.
In the technical scheme, the mechanical mixing mode is mixing by using a ball mill, and the ball milling time is 1-3 h.
In the technical scheme, the grain size of the white corundum micro powder is 0.1-10 microns, and the mass fraction of the basic binder is 2-40 wt.%.
In the technical scheme, the basic bonding agent is epoxy resin, novel phenol resin, polyurethane resin or polyimide resin.
In the technical scheme, the binder is paraffin or water glass.
In the technical scheme, the particle size of the particles meeting the requirement is 60-80 meshes.
In the technical scheme, the sintering temperature is 800-1200 ℃, the heating rate is 5-10 ℃/min, and the heat preservation time is 0.5-2 h.
Compared with the prior art, the invention has the advantages and beneficial effects that: the preparation process is very simple, and the polycrystalline corundum abrasive is obtained by directly mixing, sieving, forming, granulating and sintering the white corundum micro powder and the basic bonding agent; the compressive strength ratio of the obtained polycrystalline corundum abrasive before and after corrosion is determined after the polycrystalline corundum abrasive is soaked in tap water for 100 hours, and the numerical value can reach 58.93 percent at most; the highest ball milling toughness can reach 49.93 percent according to GB/T23538-; the single-particle compressive strength can reach 25-35N, and the highest density of the abrasive can reach 3-3.5g/cm 3.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments. It should be noted that: the following examples are illustrative and not intended to be limiting, and are not intended to limit the scope of the invention. The starting materials required in the following examples are all commercially available. The ball mill is a German FRITSCH (flying) P5 four-pot planetary ball mill, the box-type resistance furnace is an SX-2.5-10TC type integrated box-type resistance furnace of yellow Ye Guangming laboratory instruments and equipment ltd, and the constant stress compressive strength tester is a QJYL-2000 type constant stress compressive strength tester of Shanghai Tingzhi instruments and instruments science and technology ltd.
Example 1
Preparation of polycrystalline corundum abrasive
(1) Uniformly mixing white corundum micro powder with the particle size of 1 mu m and epoxy resin with the mass fraction of 20% by using a ball mill for 1 h;
(2) smashing the mixed material obtained in the step (1) in a mortar, adding paraffin for granulation, screening out particles of 60 meshes, and performing dry pressing molding by using a press;
(3) and (3) heating the mixed material obtained in the step (2) to 970 ℃ at the speed of 5 ℃/min for sintering, preserving heat for 1h, then cooling to room temperature along with the furnace, and cooling after sintering to obtain the polycrystalline corundum abrasive.
The compressive strength of the single grain of the obtained polycrystalline corundum abrasive is 34.3N, the ball milling toughness is 49.93%, the corrosion resistance of the abrasive is 58.16%, and the density of the abrasive is 3.45g/cm 3.
Example 2
Preparation of polycrystalline corundum abrasive
(1) Uniformly mixing white corundum micro powder with the particle size of 2 microns and epoxy resin with the mass fraction of 25% by using a ball mill for 1 h;
(2) smashing the mixed material obtained in the step (1) in a mortar, adding paraffin for granulation, sieving and screening out particles of 60 meshes, and performing dry pressing and molding by using a press;
(3) and (3) heating the mixed material obtained in the step (2) to 1000 ℃ at the speed of 5 ℃/min for sintering, preserving heat for 1h, then cooling to room temperature along with the furnace, and cooling after sintering to obtain the polycrystalline corundum abrasive.
The compression strength of the single grain of the obtained polycrystalline corundum abrasive is 30.5N, the ball milling toughness is 29.43 percent, the corrosion resistance of the abrasive is 44.25 percent, and the density of the abrasive is 3.40g/cm3。
Example 3
Preparation of polycrystalline corundum abrasive
(1) Uniformly mixing white corundum micro powder with the particle size of 3 microns and epoxy resin with the mass fraction of 30% by using a ball mill for 2 hours;
(2) smashing the mixed material obtained in the step (1) in a mortar, sieving and screening out 60-mesh particles, adding paraffin for granulation, and performing dry pressing and molding by using a press;
(3) and (3) heating the mixed material obtained in the step (2) to 1200 ℃ at a speed of 10 ℃/min for sintering, preserving heat for 2h, then cooling to room temperature along with the furnace, and cooling after sintering to obtain the polycrystalline corundum abrasive.
The compression strength of the single grain of the obtained polycrystalline corundum abrasive is 28.0N, the ball milling toughness is 39.98 percent, the corrosion resistance of the abrasive is 58.93 percent, and the density of the abrasive is 3.50g/cm3。
Example 4
Preparation of polycrystalline corundum abrasive
(1) Uniformly mixing white corundum micro powder with the particle size of 4 microns and epoxy resin with the mass fraction of 35% by using a ball mill for 2 hours;
(2) smashing the mixed material obtained in the step (1) in a mortar, sieving and screening 80-mesh particles, adding paraffin for granulation, and performing dry pressing and molding by using a press;
(3) and (3) heating the mixed material obtained in the step (2) to 1200 ℃ at a speed of 10 ℃/min for sintering, preserving heat for 2h, then cooling to room temperature along with the furnace, and cooling after sintering to obtain the polycrystalline corundum abrasive.
The compression strength of the single grain of the obtained polycrystalline corundum abrasive is 34.0N, the ball milling toughness is 48.85 percent, the corrosion resistance of the abrasive is 56.72 percent, and the density of the abrasive is 3.20g/cm3。
The polycrystalline corundum abrasive is obtained by controlling the process parameters such as the content of the basic bonding agent, the size of granulation, the sintering temperature, the heat preservation time and the like and through the processes of uniformly mixing, sieving, forming, granulation, sintering and the like, the preparation method is simple, the requirement on instruments is low, the price of raw materials is relatively low, and the production cost of the polycrystalline corundum abrasive is greatly reduced. The compressive strength ratio of the obtained polycrystalline corundum abrasive before and after corrosion is determined after the polycrystalline corundum abrasive is soaked in tap water for 100 hours, and the numerical value can reach 58.93 percent at most; the highest ball milling toughness can reach 49.93 percent according to GB/T23538-; the single-particle compressive strength can reach 34.30N, and the density of the abrasive material can reach 3.5g/cm3 when measured by a drainage method.
The polycrystalline corundum abrasive can be prepared by adjusting the process parameters according to the invention, and the performance of the polycrystalline corundum abrasive is basically consistent with that of the embodiment. The invention has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.
Claims (6)
1. A polycrystalline corundum abrasive characterized by: the white corundum micro powder is composed of white corundum micro powder and a basic binding agent, the particle size of the white corundum micro powder is 0.1-10 mu m, and the mass fraction of the basic binding agent is 2-40 wt%;
the preparation method of the polycrystalline corundum abrasive comprises the following steps:
step 1: mechanically and uniformly mixing the white corundum micropowder and a basic binding agent, wherein the basic binding agent is epoxy resin, neophenol resin, polyurethane resin or polyimide resin;
step 2: smashing the mixed material obtained in the step (1) in a mortar, adding a binder for granulation, sieving to screen out particles meeting the particle size requirement, and performing dry pressing and molding by using a press;
and step 3: sintering the uniformly mixed material obtained in the step (2) and then cooling to obtain the polycrystalline corundum abrasive, wherein the sintering temperature is 800-1200 ℃, the heating rate is 5-10 ℃/min, and the heat preservation time is 0.5-2 h;
the single-particle compressive strength of the polycrystalline corundum abrasive is 28.0N-34.3N, the ball milling toughness is 29.43% -49.93%, the corrosion resistance is 44.25% -58.93%, and the density is 3.20g/cm3-3.50g/cm3(ii) a The determination method of the ball milling toughness is determined according to GB/T23538-2009; the method for measuring the corrosion resistance comprises the steps of soaking the polycrystalline corundum abrasive in tap water for 100 hours, and then measuring the compressive strength ratio of the polycrystalline corundum abrasive before and after soaking.
2. The polycrystalline corundum abrasive material according to claim 1, characterized in that: the particle size of the white corundum micro powder is preferably 1-2 microns.
3. The polycrystalline corundum abrasive material according to claim 1, characterized in that: the mass fraction of the base binder is preferably from 25 wt.% to 35 wt.%.
4. The polycrystalline corundum abrasive material according to claim 1, characterized in that: in the step 1 of the preparation method, the mechanical mixing mode is to use a ball mill to mix uniformly, and the ball milling time is 1-3 h.
5. The polycrystalline corundum abrasive material according to claim 1, characterized in that: in the step 2 of the preparation method, the binder is paraffin or water glass.
6. The polycrystalline corundum abrasive material according to claim 5, wherein: in the step 2 of the preparation method, the particle diameter of the particles meeting the requirement is 60-80 meshes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710944725.XA CN109593515B (en) | 2017-09-30 | 2017-09-30 | Polycrystalline corundum abrasive and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710944725.XA CN109593515B (en) | 2017-09-30 | 2017-09-30 | Polycrystalline corundum abrasive and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109593515A CN109593515A (en) | 2019-04-09 |
| CN109593515B true CN109593515B (en) | 2021-06-22 |
Family
ID=65956710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710944725.XA Expired - Fee Related CN109593515B (en) | 2017-09-30 | 2017-09-30 | Polycrystalline corundum abrasive and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109593515B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112094512A (en) * | 2020-08-25 | 2020-12-18 | 贵阳明通炉料有限公司 | High-performance sialon corundum coating and preparation method thereof |
| CN115074088A (en) * | 2022-06-27 | 2022-09-20 | 荥阳龙升磨料有限公司 | Surface-plated white corundum abrasive and preparation method thereof |
| CN117821018B (en) * | 2024-03-01 | 2024-06-14 | 淄博市淄川金龙磨料磨具有限公司 | Preparation method of chrome corundum composite abrasive |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1046924A (en) * | 1989-04-28 | 1990-11-14 | 诺顿公司 | The bonded abrasive article that contains the agglomerating sol gel alumina abrasive |
| CN103600307A (en) * | 2013-11-21 | 2014-02-26 | 江苏苏北砂轮厂有限公司 | Elastic resin grinding wheel |
| CN107200596A (en) * | 2017-07-26 | 2017-09-26 | 中钢集团洛阳耐火材料研究院有限公司 | A kind of corundum dry materials containing polycrystalline alumina fiber |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103567891B (en) * | 2012-07-31 | 2017-06-23 | 圣戈班磨料磨具有限公司 | Cutting wheel and preparation method thereof |
-
2017
- 2017-09-30 CN CN201710944725.XA patent/CN109593515B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1046924A (en) * | 1989-04-28 | 1990-11-14 | 诺顿公司 | The bonded abrasive article that contains the agglomerating sol gel alumina abrasive |
| US5035723A (en) * | 1989-04-28 | 1991-07-30 | Norton Company | Bonded abrasive products containing sintered sol gel alumina abrasive filaments |
| CN103600307A (en) * | 2013-11-21 | 2014-02-26 | 江苏苏北砂轮厂有限公司 | Elastic resin grinding wheel |
| CN107200596A (en) * | 2017-07-26 | 2017-09-26 | 中钢集团洛阳耐火材料研究院有限公司 | A kind of corundum dry materials containing polycrystalline alumina fiber |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109593515A (en) | 2019-04-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104308755B (en) | A kind of resin CBN emery wheel for precessing saw sheet matrix | |
| CN109593515B (en) | Polycrystalline corundum abrasive and preparation method thereof | |
| CN105252435B (en) | A kind of devitrified glass ceramics bond and preparation method thereof, SG grinding wheels and preparation method thereof | |
| CN103753413B (en) | A kind of processing PCB N blade peripheral grinding wheel | |
| US20150344758A1 (en) | Abrasive grain with controlled aspect ratio and thickness | |
| CN101560624B (en) | Method for preparing polycrystalline cubic boron nitride | |
| CN106041760B (en) | A kind of self-sharpening diamond grinding wheel and preparation method thereof | |
| CN106078537B (en) | Devitrified glass bonding agent and preparation method thereof for extra hard material grinding wheel, extra hard material grinding wheel and preparation method thereof, composite wheel | |
| CN105108666B (en) | One kind processing PCD saw blades ceramic skive and preparation method thereof | |
| CN109015425B (en) | Resin binder grinding wheel and preparation method thereof | |
| CN106553135B (en) | Binding agent, preparation method and grinding wheel | |
| CN103204663A (en) | Artificial stone made through using solid waste residues | |
| CN104802099B (en) | A kind of abrading block, its preparation method and application with big filings-containing cavity | |
| CN105437091A (en) | Large-pore resin binder superhard material grinding wheel for stainless steel end face grinding and manufacturing method thereof | |
| CN103753411A (en) | Ceramic and resin composite grinding wheel | |
| CN110540414A (en) | Preparation method of nano microporous corundum | |
| CN102825557A (en) | Polyvinyl acetal resin grinding wheel and production method thereof | |
| CN105950114B (en) | A kind of outer membrane mixing diamond spherical abrasive material and preparation method thereof | |
| CN104130749A (en) | Processing technology of silicon oxide polishing abrasive | |
| CN113462358A (en) | Production process of super-hard wear-resistant polymerized abrasive | |
| CN105014553A (en) | Ceramic microcrystal grinding wheel with high-strength grinding performance and manufacture method thereof | |
| CN104263318A (en) | Diamond abrasive of elastic abrasion block used for grinding and polishing nonmetal concave and convex surfaces | |
| CN104786163A (en) | Ceramic bonding agent diamond grinding tool and preparation method thereof | |
| CN105150121A (en) | Metal bonding agent diamond grinding tool and manufacturing method thereof | |
| CN110563477B (en) | Preparation method of in-situ grown alumina whisker reinforced and toughened zirconium-aluminum composite ceramic material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210622 |