CN106833843A - A kind of transformer conduction oil containing nanometer diamond alkene and preparation method thereof - Google Patents
A kind of transformer conduction oil containing nanometer diamond alkene and preparation method thereof Download PDFInfo
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Abstract
The present invention discloses a kind of transformer conduction oil containing nanometer diamond alkene, is made up of the raw material of following weight portion：80 90 parts of mineral base oil, 10 20 parts of vegetable oil, 13 parts of antirust agent, 0.1 0.5 parts of antioxidant, 0.2 0.5 parts of antigraining agent, 0.5 1 parts of dispersant, 35 parts of nanometer diamond alkene.Its preparation method is：In at 40 60 DEG C, after vegetable oil is filtered, mix with mineral base oil, in antigraining agent is added under stirring condition, mixed base oil A is obtained after filtering；Under stirring condition, to antirust agent, antioxidant, dispersant, nanometer diamond alkene is added in mixed base oil A successively, filtering, vacuum dehydration obtain final product transformer conduction oil.The conduction oil that be mixed for the raw materials such as nanometer diamond alkene and antigraining agent by the present invention, has the advantages that stable chemical nature, thermal conductivity be high, dielectric strength is high, while also beneficial to the reliable and stable operation of transformer.
Description
Technical field
The present invention relates to transformer conduction oil technical field, and in particular to a kind of transformer containing nanometer diamond alkene is used
Conduction oil and preparation method thereof.
Background technology
Transformer is a kind of common electric equipment, with buck/boost, matching impedance, the function of security isolation, whole
Play the role of in individual network system very important.But the iron core and winding of transformer can produce substantial amounts of heat in the course of the work
Amount, and heat can influence the stable state of transformer to be input into and export as shed not in time, even result in transformer and burnt due to overheat
Ruin, and then influence whole circuit induction system.Based on this, for ease of radiating, set inside oil-filled transformer in fuel tank, fuel tank and contained
Dress conduction oil, heat is taken away by conduction oil in the flowing of fuel tank internal, and thermal conductivity fin high is set outside fuel tank, so that
Reach the purpose of radiating and cooling.
Usual conduction oil plays dual parts of heat transfer and exchanges and be electrically insulated, it is therefore desirable to the heat dispersion of conduction oil
Good with insulating properties, at present, transformer develops to the direction of insulation high, Large Copacity, miniaturization, and existing conduction oil is usual
Thermal conductivity is relatively low, and based on this, logical producing strengthens its thermal diffusivity using the way for increasing area of dissipation, and this is unfavorable for miniaturization hair
Exhibition.
The content of the invention
Present invention aim at a kind of transformer conduction oil containing nanometer diamond alkene is provided, while it is corresponding to provide its
Preparation method is another goal of the invention of the invention.
Based on above-mentioned purpose, the present invention takes following technical scheme：
A kind of transformer conduction oil containing nanometer diamond alkene, is made up of the raw material of following weight portion：Mineral base oil 80-90
Part, vegetable oil 10-20 parts, antirust agent 1-3 parts, antioxidant 0.1-0.5 parts, antigraining agent 0.2-0.5 parts, dispersant 0.5-
1 part, 3-5 parts of nanometer diamond alkene.
The nanometer diamond alkene sequentially passes through activation process and surface modification treatment,
Activation process is concretely comprised the following steps：A ultrasonic wave alkali cleanings：It is the NaOH of 10%-12% that nanometer diamond alkene is added into concentration
In solution, in ultrasonic alkali cleaning at 50-60 DEG C and stir；The frequency 35-45 KHz of ultrasound, the speed of stirring is 35-40rpm, alkali
The time washed is 20-30min；B ultrasonic waves are cleaned：Nanometer diamond alkene after alkali cleaning is put into deionized water and is cleaned by ultrasonic, surpassed
Acoustic frequency is 30-40KHz, while being stirred with the mixing speed of 10-20rpm, mixing time is 15-20min, repeatedly cleaning until
Supernatant liquor pH=7；C acid-wash activations：In the nanometer diamond alkene that at 25-30 DEG C, will be cleaned be put into concentration be 25% -30% it is dilute
Acid-wash activation in salpeter solution, while being stirred with the mixing speed of 30-35rpm, mixing time is 15~20min；D ultrasonic wave water
Wash：Nanometer diamond alkene after acid-wash activation is put into deionized water with the supersonic frequency ultrasonic wave water washing of 30~35 KHz, and
Stirred with the mixing speed of 10~20 rpm, mixing time is 15~20min, and cleaning is until supernatant liquor pH=7 repeatedly；E will surpass
In at 80-90 DEG C, vacuum drying, drying time is 2~3h to nanometer diamond alkene after sound wave washing.
Surface modification treatment is concretely comprised the following steps：By the nanometer diamond alkene ultrasonic disperse after activation process in absolute ethyl alcohol
In, nanometer diamond alkene is 1-2g with the amount ratio of absolute ethyl alcohol:100ml, then in addition absolute ethyl alcohol dilution under stirring condition
The titanate coupling agent solution crossed, the addition of titanate coupling agent is the 8% of nanometer diamond alkene weight, at 80-90 DEG C, very
Sky is dried, cooling, obtains the modified nanometer diamond alkene in surface.
The particle diameter of the nanometer diamond alkene is 50-100nm.
The kinematic viscosity of the mineral base oil at 40 DEG C be 7-10mm2/s。
The vegetable oil is selected from the one kind or two in soybean oil, rapeseed oil, coconut oil, cottonseed oil, sunflower oil, sesame oil
Plant the mixture of the above；Antirust agent is one or two the mixture in dodecenylsuccinic acid, dodecenylsuccinic acid ester.
The antioxidant is one or two the mixture in 2,6 BHTs, 2,6- DI-tert-butylphenol compounds；
The antigraining agent is one or two the mixture in T809A ester type pour-point depressant, T809B ester type pour-point depressants.
It is sub- that the dispersant is selected from T154A polyisobutylene succinamides, T154B boronation polyisobutenyls succinyl
The one or more kinds of mixtures of amine, T161A high molecular weight polyisobutylene base succimides.
The preparation method of the transformer conduction oil containing nanometer diamond alkene, comprises the following steps：
1）In at 40-60 DEG C, after vegetable oil is filtered, mix with mineral base oil, in adding antigraining agent, mistake under stirring condition
Mixed base oil A is obtained after filter；Mixing speed is 1500-2000r/min；
2）Under stirring condition, to step 1）Antirust agent, antioxidant, dispersant, nanometer diamond are added in mixed base oil A successively
Alkene, filtering, vacuum dehydration obtain final product transformer conduction oil；Mixing speed is 2500-3000r/min, and mixing time is 20-
30min。
Nanometer diamond alkene of the invention is disclosed in 201510749250X, and it is lamellar mono-crystalline structures, same lamella
It is sp between carbon atom3Orbital hybridization carbon is bonded and connects, and is sp between carbon atom between layers2Hydridization carbon is bonded and connects；The nanometer
The average grain diameter of diamond alkene is R, 20 nm≤R≤500nm；The C content of the nanometer diamond alkene is 99~100%.
Compared with prior art, the invention has the advantages that：
The conduction oil for adding nanometer diamond alkene has the advantage that：
Nanometer diamond alkene pattern is multilayer chip structure, and morphology controllable, good dispersion, thermal conductivity are high, good insulating, specific surface area
Greatly, hardness is high, stable chemical nature the advantages of, it is big, easily dispersion, the series of advantages, this hair such as chemical property is highly stable
The bright conduction oil for being mixed and made into the raw materials such as nanometer diamond alkene and antigraining agent, with stable chemical nature, thermal conductivity be high, insulation
Intensity advantage high, while also beneficial to the reliable and stable operation of transformer.
Compared to other nano-particles, nanometer diamond alkene has easily dispersion, the advantage reunited is difficult, in certain addition model
In enclosing, nanometer transformer oil due to the reunion of nano-particle, settlement action, and will not cause it to deteriorate to common transformer oil.
2nd, nanometer diamond alkene has thermal conductivity very high, when oil liquid temperature is raised, can accelerate nanometer diamond alkene and surrounding
The heat exchange of liquid medium, improves the thermal conductivity of integrated transformers oil, contributes to the heat by iron core inside transformer and coil windings
Amount is quickly delivered in external environment, it is ensured that the stability and reliability of transformer station high-voltage side bus.
3rd, the insulating properties of fluid are also one of key property of transformer oil, and electrical conductivity is higher, and its insulating properties is got over
Difference.Nanometer diamond alkene is good insulating body, is added in transformer oil as nano modification particle, can make transformer
The breakdown performance of oil is necessarily strengthened, and is not only able to meet the requirement of its regulation, moreover it is possible to improve the insulating properties of traditional transformer oil
Energy.
Brief description of the drawings
Fig. 1 is the consumption of nanometer diamond alkene to the influence figure of the thermal conductivity factor of conduction oil；
Fig. 2 is the consumption of nanometer diamond alkene to the influence figure of the frequency breakdown voltage of conduction oil.
Specific embodiment
Embodiment 1
A kind of transformer conduction oil containing nanometer diamond alkene, is made up of the raw material of following weight portion：85 parts of mineral base oil,
Vegetable oil（Soybean oil）15 parts, antirust agent（Dodecenylsuccinic acid）2 parts, antioxidant（2,6 BHTs）0.3 part,
Antigraining agent（T809B ester type pour-point depressants）0.3 part, dispersant（T154A polyisobutylene succinamides）0.5 part, nanometer
3 parts of diamond alkene.
Activation process is concretely comprised the following steps：A ultrasonic wave alkali cleanings：By the NaOH that nanometer diamond alkene addition concentration is 10%
In solution, in ultrasonic alkali cleaning at 50 DEG C and stir；The KHz of frequency 35 of ultrasound, the speed of stirring is 35rpm, and the time of alkali cleaning is
30min；B ultrasonic waves are cleaned：Nanometer diamond alkene after alkali cleaning is put into deionized water and is cleaned by ultrasonic, supersonic frequency is 30KHz,
Stirred with the mixing speed of 10rpm simultaneously, mixing time is 20min, cleaning is until supernatant liquor pH=7 repeatedly；C acid-wash activations：
The acid-wash activation in the nanometer diamond alkene that at 25 DEG C, will be cleaned is put into the dilute nitric acid solution that concentration is 25%, while with 30rpm
Mixing speed stirring, mixing time is 20min；D ultrasonic wave water washings：Nanometer diamond alkene after acid-wash activation is put into deionization
With the supersonic frequency ultrasonic wave water washing of 35 KHz in water, and stirred with the mixing speed of 20 rpm, mixing time 15min, repeatedly
Cleaning is until supernatant liquor pH=7；E by the nanometer diamond alkene after ultrasonic wave water washing at 80 DEG C, vacuum drying, during drying
Between be 3h；
Surface modification treatment is concretely comprised the following steps：By the nanometer diamond alkene ultrasonic disperse after activation process in absolute ethyl alcohol, receive
Rice diamond alkene is 2g with the amount ratio of absolute ethyl alcohol:100ml, the metatitanic acid for then being diluted in addition absolute ethyl alcohol under stirring condition
Ester coupling agent solution, the addition of titanate coupling agent is the 8% of nanometer diamond alkene weight, at 80 DEG C, vacuum drying, cooling,
Obtain the modified nanometer diamond alkene in surface.
The preparation method of the transformer conduction oil containing nanometer diamond alkene, comprises the following steps：
1）In at 40 DEG C, by vegetable oil after sheet frame filter is filtered, mix with mineral base oil, it is anti-in being added under stirring condition
Crystallizing agent, obtains mixed base oil A after filtering；Mixing speed is 1500r/min；
2）Under stirring condition, to step 1）Antirust agent, antioxidant, dispersant, nanometer diamond are added in mixed base oil A successively
Alkene（It is modified）, by the filtering of sheet frame filter, vacuum dehydration（50 DEG C of dehydration temperaturre, vacuum is -0.1MPa）Obtain final product transformer
Use conduction oil；Mixing speed is 2500r/min, and mixing time is 30min.
Embodiment 2
A kind of transformer conduction oil containing nanometer diamond alkene, is made up of the raw material of following weight portion：80 parts of mineral base oil,
Vegetable oil（10 parts of rapeseed oil, 10 parts of cottonseed oil）20 parts, antirust agent（Dodecenylsuccinic acid ester）1 part, antioxidant（2,6 two uncles
Butyl paracresol）0.1 part, antigraining agent（T809A ester type pour-point depressants）0.4 part, dispersant（T161A high-molecular-weight poly isobutyls
Alkenyl succimide）0.8 part, 5 parts of nanometer diamond alkene.
Activation process is concretely comprised the following steps：A ultrasonic wave alkali cleanings：By the NaOH that nanometer diamond alkene addition concentration is 12%
In solution, in ultrasonic alkali cleaning at 60 DEG C and stir；The KHz of frequency 45 of ultrasound, the speed of stirring is 40rpm, and the time of alkali cleaning is
20min；B ultrasonic waves are cleaned：Nanometer diamond alkene after alkali cleaning is put into deionized water and is cleaned by ultrasonic, supersonic frequency is 40KHz,
Stirred with the mixing speed of 20rpm simultaneously, mixing time is 15min, cleaning is until supernatant liquor pH=7 repeatedly；C acid-wash activations：
The acid-wash activation in the nanometer diamond alkene that at 30 DEG C, will be cleaned is put into the dilute nitric acid solution that concentration is 30%, while with 35rpm
Mixing speed stirring, mixing time is 15min；D ultrasonic wave water washings：Nanometer diamond alkene after acid-wash activation is put into deionization
With the supersonic frequency ultrasonic wave water washing of 30 KHz in water, and stirred with the mixing speed of 10 rpm, mixing time 20min, repeatedly
Cleaning is until supernatant liquor pH=7；E by the nanometer diamond alkene after ultrasonic wave water washing at 90 DEG C, vacuum drying, during drying
Between be 2h；
Surface modification treatment is concretely comprised the following steps：By the nanometer diamond alkene ultrasonic disperse after activation process in absolute ethyl alcohol, receive
Rice diamond alkene is 1g with the amount ratio of absolute ethyl alcohol:100ml, the metatitanic acid for then being diluted in addition absolute ethyl alcohol under stirring condition
Ester coupling agent solution, the addition of titanate coupling agent is the 8% of nanometer diamond alkene weight, at 90 DEG C, vacuum drying, cooling,
Obtain the modified nanometer diamond alkene in surface.
The preparation method of the transformer conduction oil containing nanometer diamond alkene, comprises the following steps：
1）In at 60 DEG C, by vegetable oil after sheet frame filter is filtered, mix with mineral base oil, it is anti-in being added under stirring condition
Crystallizing agent, obtains mixed base oil A after filtering；Mixing speed is 2000r/min；
2）Under stirring condition, to step 1）Antirust agent, antioxidant, dispersant, nanometer diamond are added in mixed base oil A successively
Alkene（It is modified）, by the filtering of sheet frame filter, vacuum dehydration（60 DEG C of dehydration temperaturre, vacuum is 0.08MPa）Obtain final product transformer
Use conduction oil；Mixing speed is 3000r/min, and mixing time is 20min.
Embodiment 3
A kind of transformer conduction oil containing nanometer diamond alkene, is made up of the raw material of following weight portion：83 parts of mineral base oil,
Vegetable oil（Coconut oil）17 parts, antirust agent（1 part of dodecenylsuccinic acid, 2 parts of dodecenylsuccinic acid ester）3 parts, antioxidant
（2,6 0.2 part of BHTs, 0.3 part of 2,6- DI-tert-butylphenol compounds）0.5 part, antigraining agent（T809B ester type pour-point depressants）
0.2 part, dispersant（0.5 part of T154B boronations polyisobutylene succinamide, T161A high molecular weight polyisobutylene base succinyl
0.5 part of imines）1 part, 4 parts of nanometer diamond alkene.
The activation process of nanometer diamond alkene, surface be modified and preparation method of conduction oil, with reference to embodiment 1.
Embodiment 4
A kind of transformer conduction oil containing nanometer diamond alkene, is made up of the raw material of following weight portion：90 parts of mineral base oil,
Vegetable oil（4 parts of sunflower oil, 6 parts of sesame oil）10 parts, antirust agent（Dodecenylsuccinic acid）1.5 parts, antioxidant（The uncles of 2,6- bis-
Butylphenol）0.2 part, antigraining agent（T809A ester type pour-point depressants）0.5 part, dispersant（T154B boronation polyisobutenyls fourth two
Acid imide）0.6 part, 5 parts of nanometer diamond alkene.
The kinematic viscosity of the mineral base oil in embodiment 1-4 at 40 DEG C be 7-10mm2/s；Nanometer diamond alkene is passed through successively
Overactivation treatment and surface modification treatment, the particle diameter of nanometer diamond alkene is 50-100nm.
The activation process of nanometer diamond alkene, surface be modified and preparation method of conduction oil, with reference to embodiment 2.
The performance test of embodiment 5
Influence of the consumption of 5.1 nanometer diamond alkene to the thermal conductivity factor of conduction oil
With nanometer diamond alkene as variable in embodiment 1, the content of nanometer diamond alkene（The quality and mineral base oil of nanometer diamond alkene
With the ratio of vegetable oil quality sum, similarly hereinafter）Respectively 0,1%, 2%, 3%, 4%, 5%, the amount of other components is constant, by above-mentioned system
Preparation Method prepares conduction oil, and the thermal conductivity to conduction oil is tested respectively, portable quick using DECAGON KD2
Conductometer carries out Determination of conductive coefficients to conduction oil, and test result is as shown in Figure 1.
As shown in Figure 1, the thermal conductivity factor of transformer oil increases with the increase of nanometer diamond alkene content, when nanometer diamond alkene
Content when being 0, the thermal conductivity factor of conduction oil is 0.123 W/ (mK), when the content of nanometer diamond alkene is 4%, conduction oil
Thermal conductivity factor be 0.151, improve 22.8%, when nanometer diamond alkene content be mineral base oil and vegetable oil quality sum
5% when, the thermal conductivity factor of conduction oil improves 27.6%.It can thus be concluded that knowing, addition nanometer diamond alkene improves leading for conduction oil
Heating rate, and then improve the rate of heat exchange of conduction oil such that it is able to improve the radiating efficiency of conduction oil.
5.2 carry out breakdown performance test under alternating voltage to conduction oil
With nanometer diamond alkene as variable in embodiment 1, the content of nanometer diamond alkene is respectively 0,1%, 2%, 3%, 4%, 5%, other groups
The amount divided is constant, and the method for being prepared as described above prepares conduction oil, and carries out breakdown performance test to conduction oil under alternating voltage,
The method of testing of the frequency breakdown voltage of method of testing reference IEC60156 liquid insulating materials, test result is as shown in Figure 2.
As shown in Figure 2, the breakdown voltage of conduction oil increases with the increase of nanometer diamond alkene content, nanometer diamond alkene content
For 0 when, breakdown voltage is 63Kv, and when the content of nanometer diamond alkene is 3%, its breakdown voltage is 95kV, and breakdown voltage improves
49.2%, but nanometer diamond alkene content be more than 3% when, its breakdown potential is pressed with reduction trend, and reason may is that, nanometer diamond alkene amount
During increase, part aggregate can be produced, cause its breakdown voltage to decline.A certain amount of receiving is added in the raw material of conduction oil
Rice diamond alkene, can improve the thermal conductivity factor and breakdown voltage of conduction oil, strengthen its heat conduction and heat radiation ability and insulating capacity, so that
Ensure the security and stability of transformer, so the content of nanometer diamond alkene is advisable between 2-4%.
Claims (8)
1. a kind of transformer conduction oil containing nanometer diamond alkene, it is characterised in that be made up of the raw material of following weight portion：Ore deposit
80-90 parts of thing base oil, vegetable oil 10-20 parts, antirust agent 1-3 parts, antioxidant 0.1-0.5 parts, antigraining agent 0.2-0.5
Part, dispersant 0.5-1 parts, 3-5 parts of nanometer diamond alkene.
2. the transformer conduction oil containing nanometer diamond alkene as claimed in claim 1, it is characterised in that the nanometer diamond
Alkene sequentially passes through activation process and surface modification treatment,
Activation process is concretely comprised the following steps：A ultrasonic wave alkali cleanings：It is the NaOH of 10%-12% that nanometer diamond alkene is added into concentration
In solution, in ultrasonic alkali cleaning at 50-60 DEG C and stir；The frequency 35-45 KHz of ultrasound, the speed of stirring is 35-40rpm, alkali
The time washed is 20-30min；B ultrasonic waves are cleaned：Nanometer diamond alkene after alkali cleaning is put into deionized water and is cleaned by ultrasonic, surpassed
Acoustic frequency is 30-40KHz, while being stirred with the mixing speed of 10-20rpm, mixing time is 15-20min, repeatedly cleaning until
Supernatant liquor pH=7；C acid-wash activations：In the nanometer diamond alkene that at 25-30 DEG C, will be cleaned be put into concentration be 25% -30% it is dilute
Acid-wash activation in salpeter solution, while being stirred with the mixing speed of 30-35rpm, mixing time is 15~20min；D ultrasonic wave water
Wash：Nanometer diamond alkene after acid-wash activation is put into deionized water with the supersonic frequency ultrasonic wave water washing of 30~35 KHz, and
Stirred with the mixing speed of 10~20 rpm, mixing time is 15~20min, and cleaning is until supernatant liquor pH=7 repeatedly；E will surpass
In at 80-90 DEG C, vacuum drying, drying time is 2~3h to nanometer diamond alkene after sound wave washing.
Surface modification treatment is concretely comprised the following steps：By the nanometer diamond alkene ultrasonic disperse after activation process in absolute ethyl alcohol, receive
Rice diamond alkene is 1-2g with the amount ratio of absolute ethyl alcohol:100ml, the titanium for then being diluted in addition absolute ethyl alcohol under stirring condition
Acid esters coupling agent solution, the addition of titanate coupling agent is the 8% of nanometer diamond alkene weight, at 80-90 DEG C, vacuum drying,
Cooling, obtains the modified nanometer diamond alkene in surface.
3. the transformer conduction oil containing nanometer diamond alkene as claimed in claim 2, it is characterised in that the nanometer diamond
The particle diameter of alkene is 50-100nm.
4. the transformer conduction oil containing nanometer diamond alkene as claimed in claim 1, it is characterised in that the mineral base
Oil kinematic viscosity at 40 DEG C be 7-10mm2/s。
5. the transformer conduction oil containing nanometer diamond alkene as claimed in claim 1, it is characterised in that the plant grease separation
One or more kinds of mixtures from soybean oil, rapeseed oil, coconut oil, cottonseed oil, sunflower oil, sesame oil；Antirust
Agent is one or two the mixture in dodecenylsuccinic acid, dodecenylsuccinic acid ester.
6. the transformer conduction oil containing nanometer diamond alkene as claimed in claim 1, it is characterised in that the antioxidant is
One or two mixture in 2,6 BHTs, 2,6- DI-tert-butylphenol compounds；The antigraining agent is T809A
One or two mixture in ester type pour-point depressant, T809B ester type pour-point depressants.
7. the transformer conduction oil containing nanometer diamond alkene as claimed in claim 1, it is characterised in that the dispersant choosing
From T154A polyisobutylene succinamides, T154B boronations polyisobutylene succinamide, T161A high-molecular-weight poly isobutyls
The one or more kinds of mixtures of alkenyl succimide.
8. the preparation method of the transformer conduction oil containing nanometer diamond alkene as claimed in claim 1, it is characterised in that bag
Include following steps：
1）In at 40-60 DEG C, after vegetable oil is filtered, mix with mineral base oil, in adding antigraining agent, mistake under stirring condition
Mixed base oil A is obtained after filter；Mixing speed is 1500-2000r/min；
2）Under stirring condition, to step 1）Antirust agent, antioxidant, dispersant, nanometer diamond are added in mixed base oil A successively
Alkene, filtering, vacuum dehydration obtain final product transformer conduction oil；Mixing speed is 2500-3000r/min, and mixing time is 20-
30min。
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020115235A1 (en) * | 2018-12-07 | 2020-06-11 | Shell Internationale Research Maatschappij B.V. | Flame retardant hydraulic oil |
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| CN105505522A (en) * | 2016-01-29 | 2016-04-20 | 郑州人造金刚石及制品工程技术研究中心有限公司 | Lubricating oil additive containing nano diamond alkenes and preparation method of lubricating oil additive |
| CN105602675A (en) * | 2015-11-15 | 2016-05-25 | 赵金 | Preparation method of heat conductive oil used for transformers |
| CN105838930A (en) * | 2016-04-15 | 2016-08-10 | 郑州人造金刚石及制品工程技术研究中心有限公司 | Novel Al-C composite and preparation process and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105602675A (en) * | 2015-11-15 | 2016-05-25 | 赵金 | Preparation method of heat conductive oil used for transformers |
| CN105505522A (en) * | 2016-01-29 | 2016-04-20 | 郑州人造金刚石及制品工程技术研究中心有限公司 | Lubricating oil additive containing nano diamond alkenes and preparation method of lubricating oil additive |
| CN105838930A (en) * | 2016-04-15 | 2016-08-10 | 郑州人造金刚石及制品工程技术研究中心有限公司 | Novel Al-C composite and preparation process and application thereof |
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| WO2020115235A1 (en) * | 2018-12-07 | 2020-06-11 | Shell Internationale Research Maatschappij B.V. | Flame retardant hydraulic oil |
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