CN106076206A - A kind of twin diamond and manufacture method thereof - Google Patents
A kind of twin diamond and manufacture method thereof Download PDFInfo
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- CN106076206A CN106076206A CN201610712718.2A CN201610712718A CN106076206A CN 106076206 A CN106076206 A CN 106076206A CN 201610712718 A CN201610712718 A CN 201610712718A CN 106076206 A CN106076206 A CN 106076206A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
- B01J3/06—Processes using ultra-high pressure, e.g. for the formation of diamonds; Apparatus therefor, e.g. moulds or dies
Abstract
The invention discloses a kind of twin diamond, use the graphite of certain part by weight percentage ratio, catalyst and diamond seeds to carry out proportioning, wherein, described catalyst is mixed by a certain amount of iron powder, nikel powder and cobalt powder.By to raw material pressure in a manufacturing process, the time-division transfer of temperature, diamond is made to form 61 octahedra twin structure crystal formations in preparation process, there is no crystal defect, corner angle highlight, this raw material ratio can effectively make crystal formation during, surface perfect fall into, there is good saturating degree, meanwhile, making the main peak granularity of crystal effectively reach 2.0 3.0mm by pressure, the time-division transfer of temperature in manufacturing process, corner angle highlight.The formula for raw stock of the present invention is simple, and manufacturing process is easy, and productivity is high, the crystal structure produced is stable, zero defect, function admirable, high with the conjugation of diamond tool parent, have broad application prospects in fields such as geological drilling, cutting and Precision Machining, should be widely promoted application.
Description
Technical field
The invention belongs to diamond production technical field, be specially a kind of twin diamond and manufacturer thereof
Method.
Background technology
Graphite becomes diamond in the case of high pressure and high temperature.In existing artificial diamond's Stone technique, the Buddha's warrior attendant of generation
Stone is all the structure of single hexakisooctahedron, but in reality application or life, the property of twin diamond is at some
Field is more suitable for application, as in fields such as geological drilling, cutting and Precision Machining, has great market to twin diamond empty
Between demand.But, there is presently no the method being directly synthesized twin structure diamond.
Summary of the invention
It is an object of the invention to provide a kind of twin diamond and manufacture method thereof, realize manually being directly synthesized twin
The diamond of crystal structure.
The technical solution adopted in the present invention is:
A kind of twin diamond, uses the raw material of following weight portion percentage ratio to prepare: graphite 63-68%, catalyst 30-35%
With diamond seeds 2-5%, wherein, described catalyst is the cobalt powder mixture of the iron powder of 60-75%, the nikel powder of 22-39% and 1-3%.
Preferably, the raw material ratio of following weight portion percentage ratio is used: graphite 65%, catalyst 32% and diamond seeds
3%, wherein, described catalyst is the cobalt powder mixture of the iron powder of 72%, the nikel powder of 26.5% and 1.5%.
The manufacture method of above-mentioned twin diamond is: place after uniformly being mixed by the raw material of described weight
In diamond synthesizing equipment,
First, using the time of 40-60 second, averagely boost to 63-66MPa, constant voltage keeps 6-8 minute the most at this pressure,
Then at the uniform velocity boost to 76-79MPa with the time of 30-50 second, then averagely boost to 88-90MPa with 1100-1300 minute；
During above-mentioned Stress control, start to warm up time between the 30-40 second, use the time of 35-45 second to be warming up to
1200 1500 DEG C, then constant temperature keeps 6-8 minute, then starts to lower the temperature for the first time, and temperature fall time is the 20-35 second for the first time,
It is cooled to 1,150 1350 DEG C, then carries out second time and lower the temperature, be uniformly down to 1,100 1300 DEG C, synchronize with last pressure rising time
Terminate, can be prepared by twin diamond.
Preferably, first, use the time of 50 seconds, averagely boost to 65MPa, under the pressure of 65 MPa, then keep 7
Minute, then at the uniform velocity boost to 78MPa with the time of 40 seconds, then averagely boost to 89MPa with 1200 minutes；
From being first begin to starting to warm up for the 35th second of boosting, with the times of 40 seconds, temperature being risen to 1400 DEG C, then constant temperature keeps 7
Minute, then starting to lower the temperature for the first time, temperature fall time is 20 seconds for the first time, is cooled to 1250 ± 5 DEG C, then carries out second time and drops
Temperature, is uniformly down to 1200 DEG C, EOS same with last pressure rising time, can be prepared by twin diamond.
The present invention actively provides the benefit that: by pressure in the control of raw material ratio and manufacturing process, temperature
Time-division transfer, makes diamond form 61 octahedra twin structure crystal formations in preparation process, does not has crystal defect, and corner angle are dashed forward
Go out, this raw material ratio can effectively make crystal formation during, surface is perfect to be fallen into, and has good saturating degree, passes through meanwhile
In manufacturing process, pressure, the time-division transfer of temperature make the main peak granularity of crystal effectively reach 2.0 3.0mm, and corner angle highlight.
The formula for raw stock of the present invention is simple, and manufacturing process is easy, and productivity is high, and the crystal structure of production is stable, zero defect,
Function admirable, high with the conjugation of diamond tool parent, have wide in fields such as geological drilling, cutting and Precision Machining
Application prospect, should be widely promoted application.
Accompanying drawing explanation
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the time of the embodiment of the present invention three, pressure, power (temperature) curve synoptic diagram.
In figure: 1 express time, pressure curve, 2 express times, power (temperature) curve.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is expanded on further.
Embodiment one
A kind of twin diamond, uses the raw material of following weight portion percentage ratio to prepare: graphite 63%, catalyst 34% and Buddha's warrior attendant
Stone crystal seed 3%, wherein, described catalyst is the cobalt powder mixture of the iron powder of 75%, the nikel powder of 22% and 3%.
Its manufacture method is: be placed on diamond synthesizing equipment after uniformly being mixed by the raw material of described weight
In,
First, using the time of 40 seconds, averagely boost to 63MPa, constant voltage keeps 8 minutes the most at this pressure, then with 30
The time of second at the uniform velocity boosts to 76MPa, then averagely boosts to 88MPa with 1100 minutes；
During above-mentioned Stress control, start to warm up time between the 30th second, use the time of 35 seconds to be warming up to 1200 DEG C, so
Rear constant temperature keeps 8 minutes, then starts to lower the temperature for the first time, and temperature fall time is 20 seconds for the first time, is cooled to 1150 DEG C, then carries out
Second time cooling, is uniformly down to 1100 DEG C, and EOS same with last pressure rising time can be prepared by twin diamond.
The main peak granularity of 61 octahedral twin crystal structures of this twin diamond effectively reaches 2.0 2.6mm, produces
Rate is up to 69%.
Embodiment two
A kind of twin diamond, uses the raw material of following weight portion percentage ratio to prepare: graphite 68%, catalyst 30% and Buddha's warrior attendant
Stone crystal seed 2%, wherein, described catalyst is the cobalt powder mixture of the iron powder of 60%, the nikel powder of 39% and 1%.
Its manufacture method is: be placed on diamond synthesizing equipment after uniformly being mixed by the raw material of described weight
In,
First, using the time of 60 seconds, averagely boost to 66MPa, constant voltage keeps 6 minutes the most at this pressure, then with 50
The time of second at the uniform velocity boosts to 79MPa, then averagely boosts to 90MPa with 1300 minutes；
During above-mentioned Stress control, start to warm up time between the 40th second, use the time of 45 seconds to be warming up to 1500 DEG C, so
Rear constant temperature keeps 6 minutes, then starts to lower the temperature for the first time, and temperature fall time is 35 seconds for the first time, is cooled to 1350 DEG C, then carries out
Second time cooling, is uniformly down to 1300 DEG C, and EOS same with last pressure rising time can be prepared by twin diamond.
The main peak granularity of 61 octahedral twin crystal structures of this twin diamond effectively reaches 2.3 2.8mm, produces
Rate is up to 74%.
Embodiment three
A kind of twin diamond, uses the raw material of following weight portion percentage ratio to prepare: 650 grams of graphite, catalyst 32 grams and
Diamond seeds 3 grams, wherein, described catalyst is the cobalt powder mixture of the iron powder of 72 grams, the nikel powder of 26.5 grams and 1.5 grams.
Its manufacture method is: be placed on diamond synthesizing equipment after uniformly being mixed by the raw material of described weight
In,
Referring to Fig. 1, first, use the time of 50 seconds, averagely boost to 65MPa, then under the pressure of 65 MPa, keep 7 points
Clock, then at the uniform velocity boosts to 78MPa with the time of 40 seconds, then averagely boosted to 89MPa with 1200 minutes；
From being first begin to starting to warm up for the 35th second of boosting, heating mode is an up equipment synthesis power, will with the times of 40 seconds
Equipment synthesis power is promoted to 6.0kw from 0.0KW, and temperature rises to 1400 DEG C, and then constant temperature keeps 7 minutes, then starts the
Once lowering the temperature, temperature fall time is 20 seconds for the first time, in these 20 seconds, synthesis power averaging is down to 5.13 kw, makes temperature be down to
1250 DEG C, then carry out second time and lower the temperature, be uniformly down to 1200 DEG C, when synthesis power averaging is down to 4.86 kw and is finally boosted
Between same EOS, can be prepared by twin diamond.
The main peak granularity of 61 octahedral twin crystal structures of this twin diamond effectively reaches 2.6 3.0mm, produces
Rate is up to 85%.
Embodiment four
A kind of twin diamond, uses the raw material of following weight portion percentage ratio to prepare: 65 grams of graphite, catalyst 33 grams and gold
Hard rock crystal seed 2 grams, wherein, described catalyst is the cobalt powder mixture of the iron powder of 68 grams, the nikel powder of 30 grams and 2 grams.
Its manufacture method is: be placed on diamond synthesizing equipment after uniformly being mixed by the raw material of described weight
In,
First, using the time of 50 seconds, averagely boost to 64MPa, constant voltage keeps 7.5 minutes the most at this pressure, then uses
The time of 40 seconds at the uniform velocity boosts to 78MPa, then averagely boosts to 89MPa with 1250 minutes；
During above-mentioned Stress control, realize temperature control by control equipment synthesis power, started when the 38th second
Heat up, use the time of 42 seconds that equipment is synthesized power and be promoted to 5.85kw from 0.0KW, make synthesis temperature be warming up to 1300 DEG C,
Then constant temperature keeps 8 minutes, then starts to lower the temperature for the first time, and temperature fall time is 30 seconds for the first time, in these 30 seconds, will synthesize merit
Rate is averagely down to 5.13 kw, is cooled to 1250 DEG C, then carries out second time and lowers the temperature, be uniformly down to 1180 DEG C, synthesizes power averaging
It is down to 4.66 kw and same EOS last pressure rising time, can be prepared by twin diamond.
The main peak granularity of 61 octahedral twin crystal structures of this twin diamond effectively reaches 2.5 2.8mm, produces
Rate is up to 78%.
Technical scheme is not restricted in the range of embodiment of the present invention.The most detailed description of the present invention
Technology contents be known technology.
Claims (4)
1. a twin diamond, it is characterised in that: use the raw material of following weight portion percentage ratio to prepare: graphite 63-
68%, catalyst 30-35% and diamond seeds 2-5%, wherein, described catalyst is the iron powder of 60-75%, the nikel powder of 22-39% and 1-3%
Cobalt powder mixture.
2. twin diamond as claimed in claim 1, it is characterised in that: use the raw material of following weight portion percentage ratio
Proportioning: graphite 65%, catalyst 32% and diamond seeds 3%, wherein, described catalyst is the iron powder of 72%, the nikel powder of 26.5% and 1.5%
Cobalt powder mixture.
3. a manufacture method for twin diamond as claimed in claim 1 or 2, by the former material of described weight
It is placed in diamond synthesizing equipment after material uniformly mixing, it is characterised in that:
First, using the time of 40-60 second, averagely boost to 63-66MPa, constant voltage keeps 6-8 minute the most at this pressure,
Then at the uniform velocity boost to 76-79MPa with the time of 30-50 second, then averagely boost to 88-90MPa with 1100-1300 minute；
During above-mentioned Stress control, start to warm up time between the 30-40 second, use the time of 35-45 second to be warming up to
1200 1500 DEG C, then constant temperature keeps 6-8 minute, then starts to lower the temperature for the first time, and temperature fall time is the 20-35 second for the first time,
It is cooled to 1,150 1350 DEG C, then carries out second time and lower the temperature, be uniformly down to 1,100 1300 DEG C, synchronize with last pressure rising time
Terminate, can be prepared by twin diamond.
4. manufacture method as claimed in claim 1, it is characterised in that: first, use the time of 50 seconds, averagely boost to
65MPa, then keeps 7 minutes under the pressure of 65 MPa, then at the uniform velocity boosts to 78MPa with the time of 40 seconds, then use
Within 1200 minutes, averagely boost to 89MPa；
From being first begin to starting to warm up for the 35th second of boosting, with the times of 40 seconds, temperature being risen to 1400 DEG C, then constant temperature keeps 7
Minute, then starting to lower the temperature for the first time, temperature fall time is 20 seconds for the first time, is cooled to 1250 ± 5 DEG C, then carries out second time and drops
Temperature, is uniformly down to 1200 DEG C, EOS same with last pressure rising time, can be prepared by twin diamond.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110075758A (en) * | 2019-04-04 | 2019-08-02 | 河南黄河旋风股份有限公司 | A kind of side length is the manufacturing method of 8 millimeters of diamond platelets |
| CN112857059A (en) * | 2021-01-14 | 2021-05-28 | 河南黄河旋风股份有限公司 | Method for manufacturing safe and energy-saving graphite column for synthetic artificial diamond |
| CN114931902A (en) * | 2022-06-13 | 2022-08-23 | 中晶钻石有限公司 | Method for synthesizing 3-5 carat cultured diamond |
| CN115041100A (en) * | 2022-07-22 | 2022-09-13 | 中南钻石有限公司 | Diamond synthetic block cultivated by multilayer permeation type structure large-particle single crystal and preparation process thereof |
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| CN110075758A (en) * | 2019-04-04 | 2019-08-02 | 河南黄河旋风股份有限公司 | A kind of side length is the manufacturing method of 8 millimeters of diamond platelets |
| CN112857059A (en) * | 2021-01-14 | 2021-05-28 | 河南黄河旋风股份有限公司 | Method for manufacturing safe and energy-saving graphite column for synthetic artificial diamond |
| CN114931902A (en) * | 2022-06-13 | 2022-08-23 | 中晶钻石有限公司 | Method for synthesizing 3-5 carat cultured diamond |
| CN115041100A (en) * | 2022-07-22 | 2022-09-13 | 中南钻石有限公司 | Diamond synthetic block cultivated by multilayer permeation type structure large-particle single crystal and preparation process thereof |
| CN115041100B (en) * | 2022-07-22 | 2023-09-15 | 中南钻石有限公司 | Multilayer infiltration type structure large particle single crystal cultivation diamond synthetic block and preparation process thereof |
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