Boron Nitride cbn is an advanced ceramic known for its superior properties. BN chemistry has Boron-Nitrogen bonds that give rise to different structures. Of the structures of BN one such prominent structure of interest is Cubic Boron Nitride cbn. Let us try to understand c-bn and its relative aspects.
Table of Contents
Boron Nitrida Heksagonal (h-BN)
- Structure of Hexagonal Boron Nitride
- Properties of Hexagonal Boron Nitride
- Aplikasi Boron Nitrida Heksagonal
- What is cubic Boron Nitride?
- Structure of Cubic Boron Nitride
- Properti Boron Nitrida Kubik
- Boron Nitrida Kubik Vs Berlian
- Penggunaan Boron Nitrida Kubik
- Super abrasive wheels – or diamond c-BN wheel
Boron Nitrida: An Overview
Boron Nitrida is indicated by chemical formula “BN.” As earlier mentioned, Boron Nitrida exist in different forms. Generally, it is the location of Boron and Nitrogen in lattice that creates various Boron Nitride structures. Some of them are quiet famous such as amorphous, hexagonal, cubic and Wurtzite.
When it comes to functionality, Boron Nitride ceramic is highly machinable. Once machined they does not really require any heat sintering or treatment for stabilization. In addition, Boron Nitrida has higher heat capacity and is also a good electrical insulator.
For now, let’s try to understand derivatives of BN, Boron Nitrida Heksagonal (h-BN) and another Boron Nitrida Kubik (c-BN)
Boron Nitrida Heksagonal (h-BN)
Structure of Hexagonal Boron Nitride
Boron Nitrida Heksagonal is a constituent in many industrial products such as cosmetics. HBN has a structure controlled by covalent bonds. However, the layers in HBN obey wander Waals forces. The plate like geometry of HBN is the reason why it is ideal for lubrication.
Boron Nitrida Heksagonal has elements of Boron and Nitrogen fixed to its lattice. The arrangement has three nitrogen atoms attached to a Boron Atom. The similarity in the honeycomb structure is the reason for its analogy with carbon. In addition to, properties of mechanical, chemical strength and electrical insulation are due to the planar triangular bonds
Properties of Hexagonal Boron Nitride
Boron Nitrida Heksagonal is popularly manufactured through Boric Oxide nitridation at elevated temperatures. Since its stability is closer to graphene, Boron Nitrida Heksagonal is often acclaimed as the most advanced technical ceramic. Some superior properties of Boron Nitrida Heksagonal adalah konduktivitas termalnya, dan koefisien gesekannya rendah.
Aplikasi Boron Nitrida Heksagonal
- HBN is used on nanoelectronics devices as a substitute to graphene substrate
- Boron Nitrida Heksagonal in its thin form is used as coatings that resists corrosion
- HBN is often used in the manufacture of sensor materials. It is also used in electron tunneling due to its low value of dielectric constant.
Boron Nitrida Kubik
What is cubic Boron Nitride?
c-BN adalah turunan dari Boron Nitrida Heksagonal (h-BN) produced under high temperature and pressure.
Spesialisasi terbesar dari c-BN adalah bahwa ia menempati tempat kedua sebagai material terkeras di dunia. Kekuatan mekaniknya Boron nitrida kubik populer dan setara dengan berlian. Ini adalah salah satu polimorf Boron yang paling populer Nitrida.
Structure of Boron Nitrida Kubik
The basic structure of Boron Nitrida Kubik is crystalline. It has density around 3.5 g/cm3 and appears in pale yellow or transparent complexion. C-BN follows alternate arrangement of Boron and Nitrogen atoms. Here, the Boron-Nitrogen atoms follow covalent bonding which is the basic reason of its hardness and stability.
Cubic Boron Nitride Formula is given as c-BN. There are two popular types of c-Bn available today in the market. One is dense boron nitrida kubik and the other polycrystalline cubic Boron Nitride.
Cubic Boron Nitride Properties
C-BN is a brilliant semiconductor whose bandgaps are susceptible to changes in applied pressure. These changes in bandgap helps them excel as electric insulators. Boron Nitrida Kubik are generally inert and possesses low dielectric constant value. Their thermal conductivity is around 1300 KW/MK.
When it comes to reactivity, c-BN remains non-respondent even to ferrous materials. The optical range dealt by boron nitrida kubik varies from Ultra violet to the visible spectrum.
Boron Nitrida Kubik Vs Berlian
Meskipun tidak lebih keras dari berlian, kubik Boron nitrida memiliki tempat istimewa jika dibandingkan dengan berlian. Cubic boron Nitride hardness is 4500 Kg/mm2 whereas diamond has hardness around 600 Kg/mm2.The value of modulus both young’s and bulk are also in similar range of 800 – 1000 and 370 – 450.
Furthermore, when it comes to structure, like diamond, c-BN has its two base atoms that are different. The similarity of both diamond and c-BN is generally attributed to the lookalike structure they possess.
Penggunaan Boron Nitrida Kubik
bahan alat pemotong cbn
Boron Nitrida Kubik exhibits both young’s and Bulk modulus greater than Boron Carbide and Silicon Carbide. This very reason strongly contributes to the hardness of cubic Boron Nitride. The hardness makes them suitable as abrasives and help them function as bahan alat pemotong cbn. Generally Dense c-Bn is used for cutting application and porous type for grinding requirements.
The inert nature of Cubic Boron Nitride also helps them function as cutting and machining material. Unlike diamond it doesn’t react to iron. However, conventional c-Bn requires manipulation for utilising it in cutting application. This is generally done during the conversion of h-Bn to c-Bn while sintering.
cbn as electrical insulators
Apart from hardness Boron Nitrida Kubik also excels in electrical insulators. This is attributed to their wide bandgap.
cbn in semiconductor applications
By coating aluminium and Group 8 metals, C-BN functionality of becoming a sink is popular in electronic industry. C-BN is used as heat sink in lasers, microelectronic devices and LEDs.
Boron Nitrida Kubik also adds value during semiconductor synthesis to obtain p and N type by proper doping. The common materials used for doping are Silicon or Beryllium. These semiconductors work at high temperature and are used in UV sensors.
roda gerinda c-BN
Penemuan roda gerinda c-BN merited precision manufacturing due to the increased efficiency. wheels made up of c-BN contributed to industries such as aerospace, machines, tool production and automobile. roda gerinda c-BN also offer high hardness and good performance on comparison with SiC and Alumina. They ensure structural integrity at higher temperature and undergo no degradation.
The wheels of c-BN can withstand high temperature and deals with the amount of heat generated during the process. The resistance to wear and tear is also economically beneficial while considering c-BN grinding wheels. c-BN grinding wheels offer excellent surface finish and keeps away the work piece wastage. It also ensures lesser cycle time as the tasks are done quickly and precisely.
Super abrasive wheels – or diamond c-BN wheel
The super abrasive wheels are the ones differ from conventional wheel of Sic and Alumina. They are made from combining c-Bn and diamond. The super abrasive wheel offers better thermal conductivity limiting the rise in temperature of the workpiece. The roda berlian c-Bn juga menawarkan pemotongan dengan akurasi dan presisi tinggi yang berkontribusi pada masa pakai yang lebih baik.
Kesimpulan
Boron Nitrida Kubik diinginkan dalam sains modern dan manufaktur material. Mereka kompetitif jika dibandingkan dengan material seperti berlian. Mereka unggul dalam sifat-sifat seperti kekerasan, kekuatan, dan isolasi listrik. Celah pita yang lebar, sifat inert, konstanta dielektrik yang rendah, dan spesialisasi optik adalah faktor-faktor keunggulan lainnya.