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| CAS No.: | 10043-11-5 |
|---|---|
| Name: | Boron nitride |
| Molecular Structure: | |
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| Formula: | BN |
| Molecular Weight: | 30.8653 |
| Synonyms: | Elbor;BN 40SHP;Borazon;Denka boron nitride GP;Denka GP;Elbor LO 10B1-100;Elbor RM;Geksanit R; |
| EINECS: | 233-136-6 |
| Density: | 2.29 g/cm3 |
| Melting Point: | 2700oC (sublimes) |
| Boiling Point: | sublimes sl below 3000℃ [MER06] |
| Solubility: | Soluble in water (slightly soluble) at 20°C, and water (soluble) at 95°C. |
| Appearance: | white powder |
| Hazard Symbols: |
 Xi
|
| Risk Codes: | 36/37 |
| Safety: | 26-36 |
| Transport Information: | UN 1950 |
| PSA: | 23.79000 |
| LogP: | -0.90112 |
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| Conditions | Yield |
|---|---|
| With multi-walled carbon nanotubes In solid byproducts: CO, H2, H2O; mixt. of multi-walled carbon nanotubes and H3BO3 taken in quartz tube, NH3 gas passed through with 10 sccm flow rate at 200 °C 2 h, temp.slowly raised to 1000 °C for 3 h; | 99% |
| With pyrographite; iron In neat (no solvent) byproducts: CO, H2, H2O; mixt. of activated carbon, H3BO3 and ferric nitrate (mole ratio of 3:1:0.1) taken in quartz tube, dried in oven at 60 °C 6 h, NH3 gas passed through with 10 sccm flow rate, heating at 1300 °C for 4 h; | |
| byproducts: H2O; synthesis of BN coating on the surfaces of carbon nanotubes and nanofibers around 1150°C using infiltration of nanotubes with boric acid and nitridation in ammonia; |
| Conditions | Yield |
|---|---|
| over 600°C in N2 atmosphere; | 90% |
| Ca3N2, hexagonal High Pressure; over 100kg/cm2, in N2 stream, 1700-2000°C, 5-9 min; washing with water; | 80% |
| magnesium nitride High Pressure; over 100kg/cm2, in N2 stream, 1700-2000°C, 5-9 min; washing with water; | 80% |
| Conditions | Yield |
|---|---|
| With Fe2O3 In neat (no solvent, solid phase) mixt. CaB6 and Fe2O3 was heated to 750°C for 10 min under Ar atm., heated to 1150°C at 6°C/min keeping for 6 h in NH3 atm.; react. mixt. was cooled to room temp., product was washe with HCl, filtered, washed with water and dried in vacuo at 80°C for 12 h; | 81.4% |
| Conditions | Yield |
|---|---|
| With NH3 byproducts: H2; at 190°C, NH3:B2H6=9:1; | A 9% B n/a C 80% |
| Conditions | Yield |
|---|---|
| Ca3N2, hexagonal High Pressure; over 100kg/cm2, in N2 stream, 1700-2000°C, 5-9 min; washing with water; | 80% |
| magnesium nitride High Pressure; over 100kg/cm2, in N2 stream, 1700-2000°C, 5-9 min; washing with water; | 80% |
| With ammonia heating at 900°C for 2-6 h under NH3 flow; |
| Conditions | Yield |
|---|---|
| Ca3N2, hexagonal High Pressure; over 100kg/cm2, in N2 stream, 1700-2000°C, 5-9 min; washing with water; | 80% |
| magnesium nitride High Pressure; over 100kg/cm2, in N2 stream, 1700-2000°C, 5-9 min; washing with water; | 80% |
| 500-900°C in NH3 stream, at 1650°C in N2 or NH3 stream; |
| Conditions | Yield |
|---|---|
| excess of NH3 at ambient temp. in N2 or H2 atmosphere; heating in H2 at 1200°C; 1000°C in H2 stream or in vac.; or at 2000°C in N2; | 80% |
| With hydrogen In gaseous matrix r. f. thermal plasma chemical vapour deposition (Ar carrier gas, Mo or Si substrate, substrate temp. 430-1100°C, deposition time 5 -10 min); secondary electron microscopy, X-ray diffraction; | |
| BCl3 + NH3 flow (P(BCl3)/P(NH3) = 0.5) passed on support heated at 1323 K (3.5-4.5 min); BCl3 flow stopped; kept in Ar + 7% H2 atm (NH3 flow reduced by 1/2) for 30 min; total flow rate reduced; cooled to room temp.; XRD; |
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| Conditions | Yield |
|---|---|
| With ammonia In not given byproducts: CH4, H2; slowly heating (2 °C/min) of B5H8CHCH2 from 25 to 350 °C under a flow of NH3 (100 mL/min), heating (10 °C/min) to 1000 °C, temp. maintained at 1000 ° C for 2 h;; elem. anal., the largely amorphous product changes at 1450 °C to crystalline BN;; | 72.2% |
| Conditions | Yield |
|---|---|
| In melt 300-1000°C, 1 mole dicyandiamide, 2 mole NH4Cl, 2-4 mole H3BO3; | 65% |
| Conditions | Yield |
|---|---|
| With NH3 byproducts: H2; at 400°C, NH3:B2H6=9:1; | A 30% B 65% |
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Specification
The Boron nitride with the cas number 10043-11-5, is also called azanylidyneborane named by IUPAC. It's system name is nitriloborane. It belongs to the following product categories: (1)Inorganics; (2)Ceramics; (3)Metal and Ceramic Science; (4)Nitrides. It's physical properties about Pregn-4-ene-3,20-dione,16,17-epoxy-11-hydroxy- are: (1)#H bond acceptors: 1 ; (2)#H bond donors: 0 ; (3)#Freely Rotating Bonds: 0 ; (4)Polar Surface Area: 23.79 Å2. It seems like white powder. It is stable but incompatible with oxidizing agents. When you are using this chemical, please be cautious about it as the following: boron nitride is quite irritating to eyes and respiratory system. Before you are using it , please wear suitable protective clothing. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
Prepration of Boron nitride: Boron nitride has not been found in nature and therefore is produced synthetically. The most common raw materials for BN synthesis, boric acid and boron trioxide are produced on industrial scales by treating minerals borax and colemanite with sulfuric acid or hydrochloric acid:
Na2B4O7·10H2O (borax) + H2SO4 → 4 H3BO3 (boric acid) + Na2SO4 + 5 H2O
Hexagonal boron nitride is obtained by the reacting boron trioxide (B2O3) or boric acid (B(OH)3) with ammonia (NH3) or urea (CO(NH2)2) in nitrogen atmosphere:
B2O3 + 2 NH3 → 2 BN + 3 H2O (T = 900 °C)
B(OH)3 + 3 NH3 → BN + 2 NH3 + 3 H2O (T = 900 °C)
B2O3 + CO(NH2)2 → 2 BN + CO2 + 2 H2O (T > 1000 °C)
B2O3 + 3 CaB6 + 10 N2 → 20 BN + 3 CaO (T > 1500 °C)
Uses of Boron nitride: Boron nitride ceramics are traditionally used as parts of high-temperature equipment because of excellent thermal and chemical stability. Boron nitride has a great potential in nanotechnology. Nanotubes of BN can be produced that have a structure similar to that of carbon nanotubes. However the properties are very different: carbon nanotubes can be metallic or semiconducting depending on the rolling direction and radius, whereas a BN nanotube is an electrical insulator with a wide bandgap of ~5.5 eV (same as in diamond), which is almost independent of tube chirality and morphology. Similar to other BN forms, BN nanotubes are more thermally and chemically stable than carbon nanotubes which favors them for some applications.
You can still convert the following datas into molecular structure :
(1).SMILES: B#N
(2).InChI:InChI=1/BN/c1-2
Toxic information of Boron nitride can be showed as follows:
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| rabbit | LD | skin | > 20mL/kg (20mL/kg) | Union Carbide Data Sheet. Vol. 7/20/1965, | |
| rat | LD | oral | > 50gm/kg (50000mg/kg) | Union Carbide Data Sheet. Vol. 7/20/1965, |