CN107265415A - A kind of method that urea auxiliary hot soarfing prepares mesoporous boron nitride from boron nitride - Google Patents
A kind of method that urea auxiliary hot soarfing prepares mesoporous boron nitride from boron nitride Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/06—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron
- C01B21/064—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron with boron
- C01B21/0648—After-treatment, e.g. grinding, purification
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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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
- B01J20/0259—Compounds of N, P, As, Sb, Bi
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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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
- B01J20/28078—Pore diameter
- B01J20/28083—Pore diameter being in the range 2-50 nm, i.e. mesopores
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
Abstract
The application provides a kind of method that urea auxiliary hot soarfing prepares mesoporous boron nitride from boron nitride, first prepares boron nitride material；Urea and boron nitride are pressed 1 again:40 quality proportionings prepare mesoporous boron nitride material after being homogenously mixed together in 600 DEG C of calcinings, the red adsorption test of centering shows that the red adsorbance 898.50mg/g of the mesoporous boron nitride centering of prepared high adsorption is 44.4 times of the red mg/g of adsorbance 20.22 of boron nitride centering, this method is simple to operate, cost is low, has good application prospect in terms of the processing of waste water from dyestuff.
Description
Technical field
The invention belongs to boron nitride material and purification of waste water field, and in particular to a kind of urea aids in hot soarfing from boron nitride system
The method of standby mesoporous boron nitride.
Background technology
Boron nitride is a kind of artificial synthesized non-oxidic material, excellent with anti-oxidant, high temperature resistant, resistant to chemical etching etc.
Physics and chemical characteristic, be widely used [Zhao Ze in fields such as opto-electronic device, functional composite material, hydrogen storage, catalysis
China, Wu Xiangfeng, Fu Shida, Yu Xiaoying, the Chinese powder industry of preparation and application progress of Zheng Sensen boron nitride
2015, 3, 7-12；Liu Chuan, tension force, Li Ping, Chen Yongan, Cui Wenwen, the stripping of Zhang Hailin boron nitride two-dimension nano materials
From Study on Preparation Technology progress material engineering 2016,44,122-128].High adsorption boron nitride is very promising
Sewage purification material：To oil adsorbance more than 8 g/g [Weiwei Lei, David Portehault, Dan Liu,
Si Qin, Ying Chen. Porous boron nitride nanosheets for effective water
cleaning. Nat. Commun. 2013, 4, 1777(1-7)；Fei Liu, Jie Yu, Xixi Ji, Muqi
Qian. Nanosheet-Structured Boron Nitride Spheres with a Versatile Adsorption
Capacity for Water Cleaning. ACS Appl. Mater. Inter. 2015,7,1824-1832], it is right
The adsorbance of the dyestuffs such as methyl blue be about 400 mg/g [Preeti Singla, Neetu Goel, Vinod kumar,
Sonal Singhal. Boron nitride nanomaterials with different morphologies:
Synthesis, characterization and efficient application in dye adsorption.
Ceram. Int. 2015, 41, 10565-10577; Jie Li, Yang Huang, Zhenya Liu, Jun Zhang,
Xiaoxi Liu, Han Luo, Yuanhui Ma, Xuewen Xu, Yang Lu, Jing Lin, Jin Zou,
Chengchun Tang. Chemical activation of boron nitride fibers for improved
Cationic dye removal performance. J. Mater. Chem. A. 2015,3,8185-8193], it is right
The adsorbance of benzene be about 700 mg/g [Jie Li, Xing Xiao, Xuewen Xu, Jing Lin, Yang Huang,
Yanming Xue, Peng Jin, Jin Zou, Chengchun Tang. Activated boron nitride as an
effective adsorbent for metal ions and organic pollutants. Sci. Rep. 2013, 3,
3208(1-7)].The conventional method for preparing high adsorption boron nitride has [Liu Dong, Tang Chengchun, the Xue Yanming, Lee such as template at present
The outstanding novel porous boron nitride material chemical progress of, 2013,25,1113-1121].But template needs removing template,
Cost is higher.Ball-milling method is to peel off boron nitride using mechanical energy, and research recently finds to add urea in mechanical milling process can be with
Improve and peel off efficiency [Weiwei Lei, Vadym N. M DEG C halin, Dan that boron nitride prepares high adsorption boron nitride
Liu, Si Qin, Yury Gogotsi, Ying Chen. Boron nitride colloidal solutions,
ultralight aerogels and freestanding membranes through one-step exfoliation
And functionalization. Nat. Commun, 2015,6,8849 (1-8)], the effect of urea is in ball milling mistake
Journey is released can be with ammonia, and ammonia can react to improve charge stripping efficiency under ball milling condition with boron nitride.Ball-milling method is not only needed
Want specific ball mill device, in addition it is also necessary to consume electric energy.
Urea can also release ammonia in heating process, urea and boron nitride are mixed prepared by being heat-treated at present
There is not been reported for the research of high adsorption boron nitride, therefore the present invention has innovative and application prospect well.
The content of the invention
The technical problem of solution：The application is mainly a kind of urea auxiliary hot soarfing of proposition and prepares mesoporous boron nitride from boron nitride
Method, solution has that boron nitride material absorption property is low, mesoporous boron nitride has high absorption property and urea in the prior art
The technical problems such as ammonia can be released in a heated condition.
Technical scheme：A kind of method that urea auxiliary hot soarfing prepares mesoporous boron nitride from boron nitride, comprises the following steps：
The first step：Urea and diboron trioxide are pressed into quality proportioning 1:（2-4）It is heated to after well mixed in vacuum atmosphere oven
1000 DEG C -1100 DEG C, constant temperature 3-4 hours prepares boron nitride powder material；
Second step：Boron nitride powder material and urea are pressed into quality proportioning 1:（20-80）Mixed in mortar and boron nitride-urea is made
Aggregate sample, is then placed in crucible, covers crucible cover；
3rd step：By boron nitride-urea aggregate sample in 550 DEG C of -600 DEG C of calcinings, mesoporous boron nitride material is made；
It is used as a preferred technical solution of the present invention：The first step is concretely comprised the following steps, and urea and diboron trioxide are pressed into matter
Amount proportioning 1:（2-4）Weigh, then grinding is well mixed for 20-30 minutes in agates Yan Portland, by the well mixed oxygen of urea-three
Change two boron mixtures to be placed in alumina crucible, cover crucible cover, then crucible is placed in vacuum atmosphere oven, with 10 DEG C/min
Speed is warming up to 1000-1100 DEG C of constant temperature and room temperature is naturally cooling to after 3-4 hours, takes out sample, is washed with deionized water 3-5 times,
The complete diboron trioxide of unreacted is washed away, water washed sample is put into 100 DEG C of baking oven and dries 12h, the sample of drying is taken out
Product and being placed in mortar are ground to powdered, prepare boron nitride powder material.
It is used as a preferred technical solution of the present invention：The second step is concretely comprised the following steps, by boron nitride powder material and
Urea presses 1:（20-80）Quality proportioning is weighed, and is ground 20-30 minutes in mortar, is well mixed, and boron nitride-urea is made and mixes
Sample is closed, is then placed in alumina crucible, covers crucible cover.
It is used as a preferred technical solution of the present invention：In 3rd step, the oxygen of boron nitride-urea aggregate sample will be placed with
Change aluminium crucible to be put into vacuum atmosphere oven, 550-600 DEG C is risen to 10 DEG C/min programming rate, constant temperature 2 hours, then drop naturally
Warm to room temperature, the mesoporous boron nitride material of high adsorption is made.
It is used as a preferred technical solution of the present invention：The vacuum atmosphere oven uses box Muffle furnace LB-Q30/14,
By Shanghai, Luo Bei precision instruments Co., Ltd buys.
Beneficial effect：A kind of herein described urea auxiliary hot soarfing from the method that boron nitride prepares mesoporous boron nitride use with
Upper technical scheme compared with prior art, with following technique effect：
1st, urea auxiliary hot soarfing is simple from technique that boron nitride prepares mesoporous boron nitride, raw material is easy to get, suitable large-scale production；
2nd, carrier gas need not be led in whole course of reaction, technique is simple, and obtained boron nitride material centering is red good suction
Attached performance, with good innovative and application prospect；
3rd, the ammonia released using urea in pyrolytic process is peeled off boron nitride and prepares high adsorption boron nitride material, and urea exists
A large amount of ammonias can be released during 600 DEG C of heating, ammonia can react with the boron element in boron nitride under the high temperature conditions, so that
Boron surface pore-creating is nitrogenized, and causes boron nitride peeling-off, so that the boron nitride material with high absorption property is made；
4th, the red adsorbance of prepared high adsorption boron nitride centering is 898.5mg/g, far above document report activated carbon pair
(Lei Xiaoling, Huang Fang, old Yao, fourth society light activated carbons are ground the adsorbance 55mg/g of dimethyl diaminophenazine chloride to the absorption property of typical dye
Study carefully Treatment of Industrial Water, 2013,33,57-60)；
5th, the preparation method is using urea and diboron trioxide as raw material, it is only necessary to carrier gas is not needed in atmosphere furnace, and heating process,
Cost is low, and technique is simple, is easier to promote, with preferable actual application prospect；
6th, high adsorption boron nitride is prepared using urea and diboron trioxide as raw material, low in raw material price, cost is low；
7th, obtained boron nitride material absorption dimethyl diaminophenazine chloride.High adsorption Boron nitride 10mg, neutral red solution in adsorption test
Adsorbed 30 hours under 50mL, dimethyl diaminophenazine chloride concentration 200mg/L, no light condition.Adsorption experimental results show that quality proportioning is 1:When 40
The red adsorbance of obtained boron nitride centering is 898.5mg/g, is the red mg/g of adsorbance 20.22 of common boron nitride centering
44.4 times, be the novel absorption material for having very much application potential.
Brief description of the drawings：
Fig. 1 is the photo of the intermediary hole boron nitride of the embodiment of the present application 1；
Fig. 2 is the intermediary hole boron nitride crystal diffraction patterns figure of the embodiment of the present application 1.
Embodiment
The embodiment of the present invention is described in further detail with reference to Figure of description：
In specific implementation, vacuum atmosphere oven used is all using box Muffle furnace LB-Q30/14 by Shanghai sieve shellfish precision instrument
Co., Ltd is directly commercially available.
Comparative example 1
As shown in figure 1, a kind of urea auxiliary hot soarfing includes such as from the specific preparation method of method that boron nitride prepares mesoporous boron nitride
Under：
The first step：It will be ground 30 minutes in 8 g urea and 16 g diboron trioxide agate Yan Portland, be well mixed it.
Second step：Well mixed urea-diboron trioxide mixture is placed in alumina crucible, crucible cover is covered.
3rd step：Then crucible is placed in vacuum atmosphere oven, 1100 DEG C, constant temperature 4 is warming up to 10 DEG C/min speed
Room temperature is naturally cooling to after hour.
4th step：Sample is taken out, is washed with deionized water 5 times, washes away the complete diboron trioxide of unreacted.
5th step：The sample handled well is put into 100 DEG C of baking oven and dries 12h, the sample of drying is taken out and is placed on and grind
It is ground to powdered in alms bowl, gained sample is white boron nitride powder material.
Obtained sample occurs in that the characteristic peak of 26.6 DEG C and 41.8 DEG C the two boron nitride in crystallogram, it was demonstrated that
Synthesized material is boron nitride.
10mg sample dispensings will be weighed into 50mL, 200mg/L dimethyl diaminophenazine chloride dye solution, 30h is adsorbed under half-light, it is right
The adsorbance of dimethyl diaminophenazine chloride reaches 20.22mg/g.
Embodiment 1
As shown in figure 1, a kind of urea auxiliary hot soarfing includes such as from the specific preparation method of method that boron nitride prepares mesoporous boron nitride
Under：
The first step：It will be ground 30 minutes in 8 g urea and 24 g diboron trioxide agate Yan Portland, be well mixed it.
Second step：Well mixed urea-diboron trioxide mixture is placed in alumina crucible, crucible cover is covered.
3rd step：Crucible is placed in vacuum atmosphere oven, 1100 DEG C, 4 hours of constant temperature are warming up to 10 DEG C/min speed
After be naturally cooling to room temperature.
4th step：Sample is taken out, is washed with deionized water 5 times, washes away the complete diboron trioxide of unreacted.
5th step：The sample handled well is put into 100 DEG C of baking oven and dries 12h, the sample of drying is taken out and is placed on and grind
It is ground to powdered in alms bowl, gained sample is white boron nitride powder material.
6th step：It is put into after 0.25g boron nitride and 5g urea are ground 20 minutes in alumina crucible, covers crucible cover.
7th step：Crucible is placed in vacuum atmosphere oven, 600 DEG C, constant temperature are heated to 10 DEG C/min heating rates
Reaction 2 hours.
8th step：Then room temperature is naturally cooling to, the mesoporous boron nitride material of high adsorption is produced.
9th step：The mesoporous boron nitride material of 10mg high adsorptions is weighed to deliver to 50mL, 200mg/L dimethyl diaminophenazine chloride dye solution
In, adsorbed 30 hours under half-light, the red adsorbance of the sample centering reaches 550.50mg/g.
Sample made from 9th step, occurs in that the feature of 26.6 DEG C and 41.8 DEG C the two boron nitride in crystallogram
Peak, it was demonstrated that synthesized material is boron nitride.
Embodiment 2
As shown in figure 1, a kind of urea auxiliary hot soarfing includes such as from the specific preparation method of method that boron nitride prepares mesoporous boron nitride
Under：
The first step：It will be ground 20 minutes in 8 g urea and 32g diboron trioxide agate Yan Portland, be well mixed it.
Second step：Well mixed urea-diboron trioxide mixture is placed in alumina crucible, crucible cover is covered.
3rd step：Then crucible is placed in vacuum atmosphere oven, 1100 DEG C, constant temperature 4 is warming up to 10 DEG C/min speed
Room temperature is naturally cooling to after hour.
4th step：Sample is taken out, is washed with deionized water 3 times, washes away the complete diboron trioxide of unreacted.
5th step：The sample handled well is put into 100 DEG C of baking oven and dries 12h, the sample of drying is taken out and is placed on and grind
It is ground to powdered in alms bowl, gained sample is white boron nitride powder material.
6th step：It is put into after 0.25g boron nitride and 10g urea are ground 20 minutes in alumina crucible, covers crucible cover.
7th step：Crucible is placed in vacuum atmosphere oven, 600 DEG C, constant temperature are heated to 10 DEG C/min heating rates
Reaction 2 hours.
8th step：Then room temperature is naturally cooling to, the mesoporous boron nitride material of high adsorption is produced.
9th step：The mesoporous boron nitride material of 10mg high adsorptions is weighed to deliver to 50mL, 200mg/L dimethyl diaminophenazine chloride dye solution
In, adsorbed 30 hours under half-light, the red adsorbance of the sample centering reaches 898.40mg/g.
Sample made from 9th step, occurs in that the feature of 26.6 DEG C and 41.8 DEG C the two boron nitride in crystallogram
Peak, it was demonstrated that synthesized material is boron nitride.
Embodiment 3
A kind of urea auxiliary hot soarfing includes as follows from the specific preparation method of method that boron nitride prepares mesoporous boron nitride：
The first step：8 g urea and 32g diboron trioxides are ground 30 minutes in agate mortar, it is well mixed.
Second step：Well mixed urea-diboron trioxide mixture is placed in alumina crucible, crucible cover is covered.
3rd step：Then crucible is placed in vacuum atmosphere oven, 1000 DEG C, constant temperature 3 is warming up to 10 DEG C/min speed
Room temperature is naturally cooling to after hour.
4th step：Sample is taken out, is washed with deionized water 4 times, washes away the complete diboron trioxide of unreacted.
5th step：The sample handled well is put into 100 DEG C of baking oven and dries 12h, the sample of drying is taken out and is placed on and grind
It is ground to powdered in alms bowl, gained sample is white boron nitride powder material.
6th step：It is put into after 0.25g boron nitride and 15g urea are ground 25 minutes in alumina crucible, covers crucible cover.
7th step：Crucible is placed in vacuum atmosphere oven, 550 DEG C, constant temperature are heated to 10 DEG C/min heating rates
Reaction 2 hours.
8th step：Then room temperature is naturally cooling to, the mesoporous boron nitride material of high adsorption is produced.
9th step：The mesoporous boron nitride material of 10mg high adsorptions is weighed to deliver to 50mL, 200mg/L dimethyl diaminophenazine chloride dye solution
In, adsorbed 30 hours under half-light, the red adsorbance of the sample centering reaches 293.82mg/g.
Sample made from 9th step, occurs in that the feature of 26.6 DEG C and 41.8 DEG C the two boron nitride in crystallogram
Peak, it was demonstrated that synthesized material is boron nitride.
Embodiment 4
A kind of urea auxiliary hot soarfing includes as follows from the specific preparation method of method that boron nitride prepares mesoporous boron nitride：
The first step：It will be ground 25 minutes in 8 g urea and 24g diboron trioxide agate Yan Portland, be well mixed it.
Second step：Well mixed urea-diboron trioxide mixture is placed in alumina crucible, crucible cover is covered.
3rd step：Then crucible is placed in vacuum atmosphere oven, 1050 DEG C, constant temperature 4 is warming up to 10 DEG C/min speed
Room temperature is naturally cooling to after hour.
4th step：Sample is taken out, is washed with deionized water 4 times, washes away the complete diboron trioxide of unreacted.
5th step：The sample handled well is put into 100 DEG C of baking oven and dries 12h, the sample of drying is taken out and is placed on and grind
It is ground to powdered in alms bowl, gained sample is white boron nitride powder material.
6th step：It is put into after 0.25g boron nitride and 20g urea are ground 25 minutes in alumina crucible, covers crucible cover.
7th step：Crucible is placed in vacuum atmosphere oven, 575 DEG C, constant temperature are heated to 10 DEG C/min heating rates
Reaction 2 hours.
8th step：Then room temperature is naturally cooling to, the mesoporous boron nitride material of high adsorption is produced.
9th step：The mesoporous boron nitride material of 10mg high adsorptions is weighed to deliver to 50mL, 200mg/L dimethyl diaminophenazine chloride dye solution
In, adsorbed 30 hours under half-light, the red adsorbance of the sample centering reaches 74.13mg/g.
Sample made from 9th step, occurs in that the feature of 26.6 DEG C and 41.8 DEG C the two boron nitride in crystallogram
Peak, it was demonstrated that synthesized material is boron nitride.
Embodiments of the present invention are explained in detail above in conjunction with accompanying drawing, but the present invention is not limited to above-mentioned embodiment party
Formula, in the knowledge that those of ordinary skill in the art possess, can also do on the premise of present inventive concept is not departed from
Go out various change.
Claims (5)
1. a kind of method that urea auxiliary hot soarfing prepares mesoporous boron nitride from boron nitride, it is characterised in that comprise the following steps：
The first step：Urea and diboron trioxide are pressed into quality proportioning 1:（2-4）It is heated to after well mixed in vacuum atmosphere oven
1000 DEG C -1100 DEG C, constant temperature 3-4 hours prepares boron nitride powder material；
Second step：Boron nitride powder material and urea are pressed into quality proportioning 1:（20-80）Mixed in mortar and boron nitride-urea is made
Aggregate sample, is then placed in crucible, covers crucible cover；
3rd step：By boron nitride-urea aggregate sample in 550 DEG C of -600 DEG C of calcinings, mesoporous boron nitride material is made.
2. the method that urea auxiliary hot soarfing according to claim 1 prepares mesoporous boron nitride from boron nitride, it is characterised in that：
The first step is concretely comprised the following steps, and urea and diboron trioxide are pressed into quality proportioning 1:（2-4）Weigh, then in agates Yan Portland
Grinding is well mixed for 20-30 minutes, and well mixed urea-diboron trioxide mixture is placed in alumina crucible, covered
Crucible, is then placed in vacuum atmosphere oven by crucible cover, and 1000-1100 DEG C of constant temperature is warming up to 3-4 hours with 10 DEG C/min speed
After be naturally cooling to room temperature, take out sample, be washed with deionized water 3-5 times, wash away the complete diboron trioxide of unreacted, will be water washed
Sample be put into 100 DEG C of baking oven and dry 12h, the sample and being placed in mortar for taking out drying is ground to powdered, prepares nitrogen
Change boron powder body material.
3. the method that urea auxiliary hot soarfing according to claim 1 prepares mesoporous boron nitride from boron nitride, it is characterised in that：
The second step is concretely comprised the following steps, and boron nitride powder material and urea are pressed into 1:（20-80）Quality proportioning is weighed, and is ground in mortar
Mill 20-30 minutes, is well mixed, boron nitride-urea aggregate sample is made, is then placed in alumina crucible, covers crucible cover.
4. the method that urea auxiliary hot soarfing according to claim 1 prepares mesoporous boron nitride from boron nitride, it is characterised in that：
In 3rd step, the alumina crucible for being placed with boron nitride-urea aggregate sample is put into vacuum atmosphere oven, with 10 DEG C/min's
Programming rate rises to 550-600 DEG C, constant temperature 2 hours, then is naturally cooling to room temperature, and the mesoporous boron nitride material of high adsorption is made.
5. the method that urea auxiliary hot soarfing according to claim 1 prepares mesoporous boron nitride from boron nitride, it is characterised in that：
The vacuum atmosphere oven uses box Muffle furnace LB-Q30/14, and by Shanghai, Luo Bei precision instruments Co., Ltd buys.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110577226A (en) * | 2019-10-18 | 2019-12-17 | 福州大学 | Preparation method of boron nitride/boron phosphate sandwich type hollow sphere |
| CN113667272A (en) * | 2021-07-02 | 2021-11-19 | 华南理工大学 | Polymer-based high-thermal-conductivity material and preparation process thereof |
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| CN105622983A (en) * | 2016-02-26 | 2016-06-01 | 成都新柯力化工科技有限公司 | Method for preparing graphene nanoplatelets special for thermal conductive plastic |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110577226A (en) * | 2019-10-18 | 2019-12-17 | 福州大学 | Preparation method of boron nitride/boron phosphate sandwich type hollow sphere |
| CN113667272A (en) * | 2021-07-02 | 2021-11-19 | 华南理工大学 | Polymer-based high-thermal-conductivity material and preparation process thereof |
| CN113667272B (en) * | 2021-07-02 | 2022-06-14 | 华南理工大学 | Polymer-based high-thermal-conductivity material and preparation process thereof |
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Application publication date: 20171020 |