CN1541963A - Substrate glass material for magnetic recording memory medium and preparing process thereof - Google Patents
Substrate glass material for magnetic recording memory medium and preparing process thereof Download PDFInfo
- Publication number
- CN1541963A CN1541963A CNA2003101083982A CN200310108398A CN1541963A CN 1541963 A CN1541963 A CN 1541963A CN A2003101083982 A CNA2003101083982 A CN A2003101083982A CN 200310108398 A CN200310108398 A CN 200310108398A CN 1541963 A CN1541963 A CN 1541963A
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- glass substrate
- magnetic recording
- glass
- storage medium
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Classifications
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/095—Glass compositions containing silica with 40% to 90% silica, by weight containing rare earths
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Magnetic Record Carriers (AREA)
- Manufacturing Of Magnetic Record Carriers (AREA)
- Glass Compositions (AREA)
Abstract
The present invention is glass substrate material for magnetic record memory medium and its preparation process, and belongs to the field of glass material and preparation technology. The glass substrate material consists of SiO2 60-70 wt%, B2O3 4-9 wt%, Na2O 4.5-6.5 wt%, K2O 0-7 wt%, Li2O 0.1-9 wt%, TiO2 0-5 wt%, Al2O3 3-8 wt%, As2O3+Sb2O3 0.4 wt%, ZnO 0-6.5 wt%, ZrO2 0-5 wt%, and proper amount of alkali earth metal and RE oxide. The preparation process includes weighing material, grinding, smelting via heating to 1300-1350 deg.c in smelting furnace and maintaining for 5-6 hr while stirring, molding with mold at 400-500 deg.c, annealing in annealing furnace at 500-550 deg.c for not longer than 8 hr, and cooling to room temperature at the rate of 4-15 deg.c/min.
Description
Technical field
The present invention relates to a kind of magnetic recording storage medium with glass substrate material and preparation method thereof, belong to glass material and preparing technical field.
Background technology
Because the high development of science and technology, the increase day by day of social information's amount has caused the great attention of people to record, storage, processing and the running of various information.For recorded information, people utilize the switching energy mode of various sound, light, electricity, magnetic, carry out information processing.At present, can say that all be unableing to do without rule from palm-type game machine, cell phone and even digital photography and pick up camera etc. ceases record storage.Especially with daily life, working and learning the very computer of substantial connection is arranged, just just make the application variation of all kinds of computer technologies because of the memory storage that has magnetic, light, electricity conversion, thereby thoroughly changed human civilization, the appearance of computer and correlation technique thereof also is human epoch-making progressive particular embodiment.Yet if the not invention as yet of the storer of the magnetic recording of main tool imformation memory function, it is clumsy that it will make computer technology be subjected to, thereby cause the hysteresis of human progress.Therefore, to be called for short the importance of disk (or claiming hard disk) again be very conspicuous to the storer of the magnetic recording of using as the computer of one of gordian technique.Modern age, the high-tech fast development caused quantity of information to leap, thereby outside this type of record storage tool large vol feature, it also needs the high-density of memory storage, just can make disk increase its information storage in the very big limit of the finite space, just is beneficial to and reads relevant information fast.Generally speaking, on disk, have only the link (bit) that increases signal record to solve with magnetic track.For this reason, must dwindle the cell size of link, so cause magnetic head more near disc surface, sometimes can be similar to and think that magnetic head and disk have been under the contact condition substantially could be operated, so find with actually operating as calculated, when magnetic head flight height just can reach when tool magnetic recording media disc only has only 15～25nm.As mentioned above, in the disk recording medium manufacture craft, require the meticulous control of thickness, one of crux at first requires as its mechanical property tool rigidity height of disk substrate base material, parallelism is good, have low roughness (below Ra～1nm, and even 0.5nm) surface again, characteristics such as quite high wear-resistant consumption and chemical resistant properties, thereby new requirement has been proposed in the selection of magnetic disk substrate material (be called for short substrate or substrate, down with).
In the past, the magneticstorage substrate material often adopted aluminum magnesium alloy, but the hardness after its annealing only is 0.9Gpa, and was softer, and very high rotating speed and big impact strength in the time of not satisfying disc sheet record reading of data easily produce bending even thermal deformation.The surface working planeness is subjected to the defect influence of Al alloy material own again, and produces some rough faults, thereby the blind spot that signal is read or remembered takes place.Key is except that deformation, is difficult to make substrate to reach the requirement of high-flatness, low surface roughness, ultrathin typeization again, so can not adapt to the highdensity needs of current recording disc.In addition, also easily make information distortion because of being subjected to that deformation influences etc.Therefore, seeking a kind of novel substrate material to replace the aluminum magnesium alloy substrate, is that an extremely has the realistic meaning task.It will make disk have to meet modern needs, with magnetic/light/signals such as electricity conversion, relates to tool more high strength, large vol and have the medium layer of higher magnetic storage density to adhere to the substrate of usefulness more.
For eliminating all drawbacks of aluminum magnesium alloy substrate, the scientific worker has carried out exploratory work to various materials, so it is known so far, some chilled glasses claim chemically reinforced glass substrate (promptly carry out ion-exchange with chemical mode and strengthen glass) again, existing practicability product such as glass-ceramic substrate has wherein also been manufactured experimently and has been comprised SiC, ZrO
2, Al
2O
3And Al/BC matrix material etc. is as the substrate of base material.
The common substrate of one class is a devitrified glass, is present widely used base material, and main manufacturer is Obara Corporation (OHARA), Bao Gu, the Minolta company of Japan, and healthy and free from worry (Corning, the U.S.) company, and some glass manufacturer are produced.Because bare glass substrate (promptly claiming matrix or mother glass) material after crystallization and thermal treatment, can effectively increase glass intensity, after surface treatment, its planeness is increased; Do not have simultaneously sodium ion again and stain problem, so need not the secondary thermo-chemical treatment, the blocking layer that more needn't prepare one deck embedding protects magnetic recording film not to be subjected to Na
+Stain, thereby can guarantee to make the reliability of its data processing.Because above-mentioned advantage makes this body material cause concern just day by day.But devitrified glass mainly exists preparation technology's cycle longer, and is more a little than processing of chemically strengthening glass plane or difficult forming, is unfavorable for shortcomings such as cost reduction.
Chilled glass substrate (being called for short slide down) is still present consumption maximum, and the relative lower material of cost.The glass substrate material of producing is mainly soda-lime glass and aluminium silicon is glass etc., the patent of invention of early stage this type of slide mainly still is a Japanese enterprises, number be respectively JP-32431 as number of patent applications such as HOYA and other companies, JP-321034 and JP-spy open flat 1-239036 etc.In general, it is after chemical enhanced, and the Young's modulus of glass substrate reaches 80～100Gpa, and Knoop hardness (Knoop hardness) reaches 600kg/mm
2, thermal expansivity reaches 45-70 * 10 approximately
-7/ k, the body material that the chemically reinforced glass substrate is used as a kind of magnetic recording storer can meet the disk related request basically, also can meet its mechanical property basically even the computer memory or the rotation speed of hard disk reach 10000 rev/mins (rpm).This type of slide superiority is that its surface tissue defective is low, and easily processing, and planeness height (reaches characteristics such as Ra＜2nm), becomes hard disk manufacturing merchant's preferred material on a large scale.But the disadvantage of the body material that present this magnetic recording storer is used is Na in its body material
+Content higher.Because Na
+Easily in medium, spread, and have the macroion mobility again, thereby in the course of processing, Na can take place
+The contamination problem that ionic is overflowed or moved, and influence its record storage characteristics of magneticmedium film; Simultaneously chemical enhanced need on the parent glass surface with K
+With Na in the base material
+Exchange, so how to reduce or few with containing Na
+Alkalimetal oxide make the magnetic disk glass base material, be a very important job.
Summary of the invention
One of purpose of the present invention is to provide a kind of less Na that contains
+Ionic magnetic recording storage medium glass substrate material.
Second purpose of the present invention is the magnetic recording storage medium glass substrate preparation methods that provides above-mentioned.
For reaching above-mentioned purpose, the present invention adopts following technical scheme:
A kind of magnetic recording storage medium glass substrate material of the present invention is characterized in that this material is by SiO
2-B
2O
3-Al
2O
3-Li
2O-TiO
2The silicate that-ZnO oxide compound constitutes is glass, and its moiety and content (weight percent) are as follows:
SiO
2???60-70％??????????B
2O
3?????????????4-9％
Na
2O???4.5-6.5％????????K
2O????????????????0-7％
Li
2O???0.1-9％??????????TiO
2???????????????0-5％
Al
2O
3?3-8％????????????As
2O
3+Sb
2O
3????0.4％
ZnO??????0-6.5％??????????ZrO
2???????????????0-5％
Alkaline earth metal oxide 0.2-0.5%
Rare earth oxide 0.2-2%
Described alkaline earth metal oxide is: BaO, MgO, CaO
Described rare earth oxide is: CeO
2, Sm
2O
3, Y
2O
3, Yb
2O
3, La
2O
3
Above-mentioned a kind of magnetic recording storage medium glass substrate preparation methods, it is characterized in that, this preparation method's concrete steps are: composition and proportioning by above-mentioned raw material are carried out weighing, put into smelting furnace after ground and mixed is even, be heated to 1300～1350 ℃ of temperature, make its fusing, and be incubated 5～6 hours, stir simultaneously; After coming out of the stove, the raw material that melts is put to the shaping dies of special use, its die temperature is at 400～500 ℃.After the shaping, promptly enter thermal treatment in the annealing furnace, thermal treatment temp is 500-550 ℃, and annealing time is 6-8 hour; Be cooled to room temperature with 4～15 ℃/min again, taking-up gets final product.
In the methods of the invention, the purpose that adds an amount of alkaline-earth metal oxygen China thing mainly is for the suitable glass melting characteristic that increases, favourable again increase density of while and chemical stability, but should not surpass 0.5wt%, make the clarification difficulty, and CeO
2Mainly solve the trickling problem of glass base-material.Add ZrO
2To increase its intensity and chemical stability.Need point out emphatically, add some rare earth oxides, as La
2O
3, Yb
2O
3, Sm
2O
3, Y
2O
3Deng, its purpose is mainly dispersivity, the rigidity intensity that improves its substrate, improves it and founds characteristic and adjust some colourities.
The inventive method compared with prior art has following conspicuous advantage and progress: because Na
2The minimizing of O content, as with HOYA company (as the trade mark
) product compares, it is original approximately 1/3～1/2 that the parent glass sodium content reduces to, and this is very favourable for intensity and chemical stability of improving material of the present invention.Simultaneously, also can reduce for Na in the magnetic recording material
+The contamination problem that ion is overflowed or moved during by sputter, and influence its record storage characteristics of magneticmedium film.Glass substrate of the present invention is surveyed through the stochastic sampling mirror, mainly makes glass substrate pass through K
+After the ion chemistry enhancement process, can reach following physicals: Young's modulus 80～83.5Gpa, specific modulus 30～33Gpa.cm
3/ g, hardness is 700Kg/mm
2, thermal expansivity 70～90 * 10
-7/ k.Should compare with other similar reinforcement slide and have certain superior part.
Embodiment
Is example to produce 1 kilogram of a kind of magnetic recording storage medium of the present invention with the glass substrate material, and the preparation method of each embodiment is undertaken by above-mentioned processing step, and its concrete moiety and processing parameter see the following form:
| Raw material composition and parameter | Embodiment | ||||
| The glass composition | ??1 | ??2 | ????3 | ???4 | ????5 |
| ??SiO 2 | 680 grams | 655 grams | 640 grams | 635 grams | 650 grams |
| ??Al 2O 3 | 75 grams | 45 grams | 40 grams | 39 grams | 39 grams |
| ??B 2O 3 | 45 grams | 80 grams | 82 grams | 81 grams | 88 grams |
| ??Na 2O | 45 grams | 55 grams | 50 grams | 65 grams | 60 grams |
| ??K 2O | 40 grams | 50 grams | 42 grams | 50 grams | |
| ??Li 2O | 28 grams | 12 grams | 87 grams | 59 grams | 4 grams |
| ??TiO 2 | 40 grams | 38 grams | 42 grams | 20 grams | |
| ??ZrO 2 | 42 grams | 34 grams | 5 grams | ||
| ??ZnO | 30 grams | 50 grams | 6 grams | 60 grams | |
| ??As 2O 3 | 1 gram | 3 grams | 4 grams | ||
| ??Sb 2O 3 | 3 grams | 4 grams | 1 gram | 4 grams | |
| Alkaline earth metal oxide | BaO 5 grams | MgO 4 gram BaO 5 grams | BaO 5 grams | ||
| Rare earth oxide | ?CeO 22 gram Sm 2O 36 grams | ??La 2O 310 grams | ?CeO 25 gram Yb 2O 38 grams | ?CeO 25 gram Y 2O 317 grams | ?CeO 220 grams |
| Glass melting temperature (℃) | ?1350 | ??1300 | ?1350 | ?1300 | ?1300 |
| The compacting tool set surface temperature (℃) | ?450 | ??500 | ?480 | ?500 | ?500 |
| Thermal treatment temp/annealing time (℃/hour) | ?500/6 | ??550/8 | ?510/8 | ?520/6 | ?500/6 |
| Go on foot cold process rate (℃/min) | ?10 | ??4 | ?8 | ?7 | ?15 |
In the methods of the invention, for homogeneity and the glass melting temperature that improves sample, can be with the above-mentioned glass of founding the back base-material, or be referred to as cullet, 's 1: 2 weight percent by cullet therewith with the ratio of components of the batch mixes material of component, be the cullet maximum can account for macrogamy material total amount 30%, the blended stock of wherein preparing burden should be evenly levigate, adds in the smelting furnace together; Carry out processing and preparing by the inventive method again, can obtain magnetic recording storage medium glass substrate material.
Claims (3)
1. a magnetic recording storage medium glass substrate material is characterized in that this material is by SiO
2-B
2O
3-Al
2O
3-Li
2O-TiO
2The silicate that-ZnO oxide compound constitutes is glass, and moiety that it is main and content (weight percent) are as follows:
SiO
2?????60-70％??????B
2O
3????????????4-9％
Na
2O????4.5-6.5％????K
2O?????????????0-5％
Li
2O????0.1-9％??????TiO
2?????????????0-5％
Al
2O
3??3-7.5％??????As
2O
3+Sb
2O
3??0.4％
ZnO??????0-6.5％??????ZrO
2??????????????0-5％
Alkaline earth metal oxide 0.2-0.5%
Rare earth oxide 0.2-2%
2. a kind of magnetic recording storage medium glass substrate material according to claim 1 is characterized in that described alkaline earth metal oxide is: BaO, MgO, CaO; Described rare earth oxide is: CeO
2, Sm
2O
3, Y
2O
3, Yb
2O
3, La
2O
3
3. a kind of magnetic recording storage medium glass substrate preparation methods according to claim 1, it is characterized in that, this preparation method's concrete steps are: composition and proportioning by above-mentioned raw material are carried out weighing, put into smelting furnace after ground and mixed is even, be heated to 1300～1350 ℃ of temperature, make its fusing, and be incubated 5～6 hours, stir simultaneously; After coming out of the stove, the raw material that melts is put to the shaping dies of special use, its die temperature is at 400～500 ℃; After the shaping, promptly enter thermal treatment in the annealing furnace, thermal treatment temp is 500-550 ℃, annealing time 6-8 hour; Be cooled to room temperature with 4～15 ℃/min again, taking-up can obtain the glass substrate material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310108398 CN1233579C (en) | 2003-11-04 | 2003-11-04 | Substrate glass material for magnetic recording memory medium and preparing process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310108398 CN1233579C (en) | 2003-11-04 | 2003-11-04 | Substrate glass material for magnetic recording memory medium and preparing process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1541963A true CN1541963A (en) | 2004-11-03 |
| CN1233579C CN1233579C (en) | 2005-12-28 |
Family
ID=34334650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310108398 Expired - Fee Related CN1233579C (en) | 2003-11-04 | 2003-11-04 | Substrate glass material for magnetic recording memory medium and preparing process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1233579C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831618A (en) * | 2010-04-15 | 2010-09-15 | 湖北大学 | Gate dielectric film with TiO2/ZrO2 two-layer stack structure and high dielectric constant and preparation method thereof |
| CN107336556A (en) * | 2017-07-14 | 2017-11-10 | 李梦娟 | A kind of crystalloid printing opacity porcelain plate picture display structure and its preparation technology |
| CN108083631A (en) * | 2017-12-15 | 2018-05-29 | 成都光明光电股份有限公司 | Glass composition |
| CN109928616A (en) * | 2017-12-15 | 2019-06-25 | 成都光明光电股份有限公司 | Glass composition |
| CN116789361A (en) * | 2023-06-28 | 2023-09-22 | 咸宁南玻光电玻璃有限公司 | Alkali-containing glass, preparation method thereof, glass-containing product, electronic product and application |
| CN117247230A (en) * | 2023-08-01 | 2023-12-19 | 咸宁南玻光电玻璃有限公司 | Glass and through hole processing method and application thereof |
-
2003
- 2003-11-04 CN CN 200310108398 patent/CN1233579C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831618A (en) * | 2010-04-15 | 2010-09-15 | 湖北大学 | Gate dielectric film with TiO2/ZrO2 two-layer stack structure and high dielectric constant and preparation method thereof |
| CN101831618B (en) * | 2010-04-15 | 2012-06-13 | 湖北大学 | Gate dielectric film with TiO2/ZrO2 two-layer stack structure and high dielectric constant and preparation method thereof |
| CN107336556A (en) * | 2017-07-14 | 2017-11-10 | 李梦娟 | A kind of crystalloid printing opacity porcelain plate picture display structure and its preparation technology |
| CN108083631A (en) * | 2017-12-15 | 2018-05-29 | 成都光明光电股份有限公司 | Glass composition |
| CN109928616A (en) * | 2017-12-15 | 2019-06-25 | 成都光明光电股份有限公司 | Glass composition |
| CN108083631B (en) * | 2017-12-15 | 2020-11-06 | 成都光明光电股份有限公司 | Glass composition |
| CN116789361A (en) * | 2023-06-28 | 2023-09-22 | 咸宁南玻光电玻璃有限公司 | Alkali-containing glass, preparation method thereof, glass-containing product, electronic product and application |
| CN117247230A (en) * | 2023-08-01 | 2023-12-19 | 咸宁南玻光电玻璃有限公司 | Glass and through hole processing method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1233579C (en) | 2005-12-28 |
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