CN101698489A - Method for making magnesium oxide octahedron - Google Patents
Method for making magnesium oxide octahedron Download PDFInfo
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- CN101698489A CN101698489A CN200910217776A CN200910217776A CN101698489A CN 101698489 A CN101698489 A CN 101698489A CN 200910217776 A CN200910217776 A CN 200910217776A CN 200910217776 A CN200910217776 A CN 200910217776A CN 101698489 A CN101698489 A CN 101698489A
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- magnesium oxide
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Abstract
The invention belongs to the technical field of method for making magnesium oxide octahedron used as voltage transmitting medium in high voltage experience. The method for making magnesium oxide octahedron includes mixing, casting moulding and sintering; dried magnesium oxide power and adhesive are mixed and stirred for 3-5 minutes; mixed liquid of magnesium oxide powder and adhesive is rapidly cast into a moulding mould under vibration, vibration is continued for 1-5 minutes after casting to remove air bubbles, and then standing is carried out for 2-3 hours and midbody is taken out; the midbody of magnesium oxide octahedron is placed into a warming furnace to be continuously heated to 190-210 DEG C at warming rate of 5-7 DEG C per hour, and then the temperature is maintained for 45-48 hours and sintering is carried out to obtain finished product. The invention has the advantages of simple operation, lower cost, low labour intensity and higher product dimensional precision.
Description
Technical field
The present invention relates to a kind of octahedral making method, in particular for the High-Voltage Experimentation method for making magnesium oxide octahedron.
Background technology
Fields such as some scientific research institutions, laboratory at home at present, scientific experiment are with the octahedra large usage quantity of magnesium oxide, and in particular for High-Voltage Experimentation, because its pressure transmission performance is good, and insulation, heat-proof quality are good, make the transmission medium of High-Voltage Experimentation with the magnesium oxide octahedron.
Existing octahedron mainly obtains by mechanical workout magnesium oxide round bar method.Exist that difficulty of processing is big, dimensional precision is lower, a large amount of magnesium oxide starting material of waste, cost are than problems such as height.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of simple and practical method for making magnesium oxide octahedron, to overcome the shortcoming of background technology.
For achieving the above object, adopt the technical scheme of following steps:
Prepare the oven dry magnesium oxide powder; Prepare cakingagent.Make feedstock production magnesium oxide octahedron with magnesium oxide powder and cakingagent.The model that cakingagent wherein can select for use U.S. AREMCO PRODUCTS company to produce is the series product of Ceramacast 584-OF, this product has different model, and the solid model is that Ceramacast 584-OF-S, liquid model are that Ceramacast 584-OF-L, Powdered model are Ceramacast 584-OF-P.The used cakingagent model of the present invention is Ceramacast584-OF-L, and liquid is creamy white.
To dry magnesium oxide powder and be uniformly mixed into pasty state liquid by the certain mass ratio with cakingagent.
Magnesium oxide powder and cakingagent uniform mixing liquid are cast in forming mould fast, solidify the back and obtain the octahedral intermediate of magnesium oxide.
The octahedral intermediate of sintered magnesia in automatic condition heating furnace makes cakingagent volatilization burn off, slowly cools to room temperature afterwards in air, obtains the finished product with certain degree of hardness of the octahedral bodily form.
Concrete technical scheme of the present invention is:
A kind of method for making magnesium oxide octahedron has batch mixing, casting, agglomerating process;
Described batch mixing process is that the magnesium oxide powder of will dry mixes by mass ratio 5: 1.85～2 with cakingagent, puts into stirrer and stirs for 3～5 seconds;
Described casting process, be that mixing liquid with magnesium oxide powder and cakingagent was cast in the forming mould in 2～5 seconds, keep concussion in the cast, continue behind the casting complete to shake for 1～5 second, to get rid of bubble, tranquil again the placement after 2～3 hours taken out, and obtains the octahedral intermediate of magnesium oxide;
Described sintering process is that the octahedral intermediate of magnesium oxide is put into heating furnace, is warming up to 190～210 ℃ continuously with 5～7 ℃/hour temperature rise rates, and constant temperature is 45～48 hours again, sinters the magnesium oxide octahedron into.
Magnesium oxide powder used in the present invention, purity are preferably more than 98%, and granularity is preferably 100～120 orders; And, make it dry through 120～130 ℃ of insulation bakings in 48～50 hours down.
The cakingagent that U.S. AREMCO PRODUCTS company produces has different models.As cakingagent of the present invention, can select model is the product of Ceramacast 584-OF-L, is the proper product of concentration.Can also select two kinds of type products to mix and use, mix use by mass ratio 5: 2～3 such as two kinds of cakingagents that are respectively Ceramacast584-OF-P and Ceramacast 584-OF-L.
The present invention has simple to operate, and cost is lower, and labour intensity is low, and the product size precision is than advantages such as height.
Description of drawings
Fig. 1 is a forming mould user mode synoptic diagram of the present invention.
Fig. 2 is the elevation cross-sectional view of forming mould of the present invention.
Fig. 3 is the A-A face sectional view of Fig. 2.
Fig. 4 is the finished product shape figure.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the invention is described in more detail.
Embodiment 1
Fig. 1 provides forming mould user mode figure of the present invention.Fig. 2 provides the front view of forming mould of the present invention.Fig. 3 provides A-A sectional view among Fig. 2.In the accompanying drawing, 1 is module, and 2 is synthetic glass, and 3 is the forming mould inner chamber, and 4 is oscillator.
Forming mould is made up of eight identical modules and six synthetic glass, and every module is a material with polytetrafluoroethyl-ne fat all, because of its smooth surface and intensity is preferably arranged.The shape of every module is that a square or rectangular parallelepiped remove an angle and form, remove behind the angle rib that forms at square or adjacent three faces of rectangular parallelepiped and constitute equilateral triangle, and rib long (being the length of side of equilateral triangle) to equal the rib of the octahedral gore of required magnesium oxide long.
Provide the process of 12 millimeters magnesium oxide octahedrons of preparation (the side trilateral length of side is 12 millimeters).
The selective oxidation magnesium dust, white, purity are more than 98%, and is pollution-free.Granularity is 100～120 orders.Take out after in 120～130 ℃ of stoves, toasting 48～50 hours, obtain drying magnesium oxide powder.
Selecting model is Ceramacast 584-OF-L, and milky white liquid is done cakingagent.
Measure oven dry magnesium oxide powder 11.25 grams and mix at ambient temperature, put into stirrer, stirred for 5 seconds, make magnesium oxide powder and cakingagent become uniform mixing liquid, in the pasty state with 150r/min with cakingagent 4.31 grams.
In the forming mould that embodiment 1 provides, module gore rib length is 12 millimeters with the uniform mixing liquid castable.Cast should be finished in as 2～5 seconds in the short period, continued 1～3 second of concussion after finishing, and got rid of bubble, and tranquil again the placement taken out the octahedral intermediate of magnesium oxide that solidifies after 2～3 hours;
Will carry out sintering at last, with the octahedra intermediate of the magnesium oxide of coagulation forming, put into automatic condition heating furnace, heat up automatically continuously with 5～7 ℃/hour, after fire box temperature reached 200 ℃, constant temperature continued baking 45～48 hours.The oven dry back slowly cools to room temperature in air, obtain product.
The shape figure of the finished product sees Fig. 4.
Embodiment 3
Provide the process of 8 millimeters magnesium oxide octahedrons of preparation (the side trilateral length of side is 8 millimeters).
Selective oxidation magnesium dust and oven dry, selection cakingagent are with embodiment 2.Measure oven dry magnesium oxide powder 5.31 grams and mix at ambient temperature, put into stirrer, stirred for 4 seconds, make magnesium oxide powder and cakingagent become uniform mixing liquid with 150r/min with cakingagent 2.01 grams.Later cast, sintering process are with embodiment 2, and use module gore rib length is 8 millimeters forming mould when just pouring into a mould.
Embodiment 4
Provide the process of 6 millimeters magnesium oxide octahedrons of preparation (the side gore length of side is 6 millimeters).
Selective oxidation magnesium dust and oven dry, selection cakingagent are with embodiment 2.Measure oven dry magnesium oxide powder 4.05 grams and mix at ambient temperature, put into stirrer, stirred for 3 seconds, make magnesium oxide powder and cakingagent become uniform mixing liquid with 150r/min with cakingagent 1.61 grams.Later cast, sintering process are with embodiment 2, and use module gore rib length is 6 millimeters forming mould when just pouring into a mould.
Embodiment 5
In embodiment 2,3,4, model be Ceramacast 584-OF-L cakingagent can with model be respectively Ceramacast 584-OF-P and two kinds of cakingagents of Ceramacast 584-OF-L by mass ratio 5: 2～3 at room temperature blended liquid substitute.
Embodiment 6
In embodiment 2～5, also the magnesium oxide powder of oven dry can be mixed by mass ratio 5: 1.85～2 with cakingagent, put into 3～5 seconds of stirrer stirring after, fill with in the forming mould of required big or small inner chamber, exhaust again, solidify, sinter into product.The good raw material of not necessarily first weighing mixes, and the mixing liquid of suitable quality is all handed over annotated in the forming mould.
Claims (4)
1. a method for making magnesium oxide octahedron has batch mixing, casting, agglomerating process;
Described batch mixing process is that the magnesium oxide powder of will dry mixes by mass ratio 5: 1.85～2 with cakingagent, puts into stirrer and stirs for 3～5 seconds;
Described casting process, be that mixing liquid with magnesium oxide powder and cakingagent was cast in the forming mould in 2～5 seconds, keep concussion in the cast, continue behind the casting complete to shake for 1～5 second, to get rid of bubble, tranquil again the placement after 2～3 hours taken out, and obtains the octahedral intermediate of magnesium oxide;
Described sintering process is that the octahedral intermediate of magnesium oxide is put into heating furnace, is warming up to 190～210 ℃ continuously with 5～7 ℃/hour temperature rise rates, and constant temperature is 45～48 hours again, sinters the magnesium oxide octahedron into.
2. method for making magnesium oxide octahedron according to claim 1 is characterized in that, described cakingagent is that the model that U.S. AREMCO PRODUCTS company produces is the product of Ceramacast584-OF-L.
3. method for making magnesium oxide octahedron according to claim 1 and 2 is characterized in that, described magnesium oxide powder, and purity is more than 98%, granularity is 100～120 orders; Through 120～130 ℃ of insulation bakings in 48～50 hours down.
4. method for making magnesium oxide octahedron according to claim 1, it is characterized in that, described cakingagent is that two kinds of cakingagents that the model that U.S. AREMCO PRODUCTS company produces is respectively Ceramacast 584-OF-P and Ceramacast 584-OF-L are mixed use by mass ratio 5: 2～3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102177768A CN101698489B (en) | 2009-10-28 | 2009-10-28 | Method for making magnesium oxide octahedron |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009102177768A CN101698489B (en) | 2009-10-28 | 2009-10-28 | Method for making magnesium oxide octahedron |
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| CN101698489A true CN101698489A (en) | 2010-04-28 |
| CN101698489B CN101698489B (en) | 2011-05-11 |
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| CN2009102177768A Expired - Fee Related CN101698489B (en) | 2009-10-28 | 2009-10-28 | Method for making magnesium oxide octahedron |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102188935A (en) * | 2011-04-13 | 2011-09-21 | 四川大学 | Novel large-cavity high-pressure device |
| CN107892559A (en) * | 2017-10-18 | 2018-04-10 | 四川大学 | A kind of preparation method of simple efficient lower thermal conductivity MgO CoO solid solution transmission media |
| CN109133873A (en) * | 2018-08-20 | 2019-01-04 | 镇江裕太防爆电加热器有限公司 | A kind of triangle magnesium pipe continuous mould pressing forming and sintering equipment |
| CN114452896A (en) * | 2022-02-09 | 2022-05-10 | 南方科技大学 | Efficient pressure transmission assembly preparation method for ultrahigh-temperature and high-pressure experiment |
| CN115947612A (en) * | 2022-12-09 | 2023-04-11 | 秦皇岛琨煜晶材科技有限公司 | Pressure transmission medium for high temperature and high pressure |
-
2009
- 2009-10-28 CN CN2009102177768A patent/CN101698489B/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102188935A (en) * | 2011-04-13 | 2011-09-21 | 四川大学 | Novel large-cavity high-pressure device |
| CN107892559A (en) * | 2017-10-18 | 2018-04-10 | 四川大学 | A kind of preparation method of simple efficient lower thermal conductivity MgO CoO solid solution transmission media |
| CN107892559B (en) * | 2017-10-18 | 2021-04-06 | 四川大学 | Simple and efficient preparation method of low-thermal-conductivity MgO-CoO solid solution pressure transmission medium |
| CN109133873A (en) * | 2018-08-20 | 2019-01-04 | 镇江裕太防爆电加热器有限公司 | A kind of triangle magnesium pipe continuous mould pressing forming and sintering equipment |
| CN114452896A (en) * | 2022-02-09 | 2022-05-10 | 南方科技大学 | Efficient pressure transmission assembly preparation method for ultrahigh-temperature and high-pressure experiment |
| CN115947612A (en) * | 2022-12-09 | 2023-04-11 | 秦皇岛琨煜晶材科技有限公司 | Pressure transmission medium for high temperature and high pressure |
| CN115947612B (en) * | 2022-12-09 | 2023-09-12 | 秦皇岛琨煜晶材科技有限公司 | Pressure transmission medium for high temperature and high pressure |
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| CN101698489B (en) | 2011-05-11 |
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Granted publication date: 20110511 Termination date: 20111028 |