Boron Nitride(BN)

Molecular Formula: BN

Molecular Weight: 24.83

CAS NO.: 10043-11-5

Density (Theoretical): 2.27 g/cm³
Color : White
Crystal Structure: Hexagonal

Rigidity of Mohs : 2,

Boron nitride is a white solid material in the as produced hot pressed form. It is a low porosity solid. It is easily machined into complex shapes using standard carbide tooling. The material is anisotropic in its electrical and mechanical properties due to the platy hexagonal crystals and their orientation during the hot press consolidation.

The properties of boron nitride powders are listed below:

BN ≥98.5%

F.B2O3 < 0.2%

F.B < 0.4%

AI2O3 < 0.01%

Si02 Trace Amount

CaO < 0.06%

K 2 0 Trace Amount

Cu0 Trace Amount

Na2O < 0.08%

MgO < 0.068%

TiO2 < 0.0018%

Mn0 Trace Amount

Fe2O3 < 0.06%

Cr2O3 < 0.0025%

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Technical Proposal for Boron Nitride Plant

1. Introduction

Boron Nitride is a kind of good solid lubricant and squeezing-antiattrite additive. It has high temperature-proof, good thermal conductivity, exposure-proof, rot-proof, lubricate in high temperature and good insulating capability. It has a good use rage, such as space navigation, national defence, electron and kern industry.

2. Process introduction

Using Potassium pentaborate that generated by potassium hydroxide and boric acid as raw material, it nitrates with ammonia gas in high temperature and the the product is generated.

3. Technical advantages:

Simple equipment, ripe technology itinerary, rich raw material source, no the three wastes, product’s turnoff rate ≥80%, Boron Nitride content ≥96%, low cost

4. Process drawing:

5. Raw material expense (base on 1kgBN)

Raw material	Expense (kg)
Liquid ammonia	25
Boric acid	4
Potassium hydroxide	0.8
Hydrochloric acid	0.5
water	20

6. Main equipment

Enamel reaction kettle, ballmill, nitrating reaction furnace

7. Others

Production scale	1.5mt/Y
Turnoff rate	80%
Capacity	350kw
Product quality standard	White powder, specific gravity 2.27, hardness 2

BN ≥98.5%	F.B2O3 < 0.2%
F.B < 0.4%	AI2O3 < 0.01%
Si02 Trace Amount	CaO < 0.06%
K 2 0 Trace Amount	Cu0 Trace Amount
Na2O < 0.08%	MgO < 0.068%
TiO2 < 0.0018%	Mn0 Trace Amount
Fe2O3 < 0.06%	Cr2O3 < 0.0025%