Beryllium oxide

	WikiDoc Resources for Beryllium oxide
Articles
Most recent articles on Beryllium oxide Most cited articles on Beryllium oxide Review articles on Beryllium oxide Articles on Beryllium oxide in N Eng J Med, Lancet, BMJ
Media
Powerpoint slides on Beryllium oxide Images of Beryllium oxide Photos of Beryllium oxide Podcasts & MP3s on Beryllium oxide Videos on Beryllium oxide
Evidence Based Medicine
Cochrane Collaboration on Beryllium oxide Bandolier on Beryllium oxide TRIP on Beryllium oxide
Clinical Trials
Ongoing Trials on Beryllium oxide at Clinical Trials.gov Trial results on Beryllium oxide Clinical Trials on Beryllium oxide at Google
Guidelines / Policies / Govt
US National Guidelines Clearinghouse on Beryllium oxide NICE Guidance on Beryllium oxide NHS PRODIGY Guidance FDA on Beryllium oxide CDC on Beryllium oxide
Books
Books on Beryllium oxide
News
Beryllium oxide in the news Be alerted to news on Beryllium oxide News trends on Beryllium oxide
Commentary
Blogs on Beryllium oxide
Definitions
Definitions of Beryllium oxide
Patient Resources / Community
Patient resources on Beryllium oxide Discussion groups on Beryllium oxide Patient Handouts on Beryllium oxide Directions to Hospitals Treating Beryllium oxide Risk calculators and risk factors for Beryllium oxide
Healthcare Provider Resources
Symptoms of Beryllium oxide Causes & Risk Factors for Beryllium oxide Diagnostic studies for Beryllium oxide Treatment of Beryllium oxide
Continuing Medical Education (CME)
CME Programs on Beryllium oxide
International
Beryllium oxide en Espanol Beryllium oxide en Francais
Business
Beryllium oxide in the Marketplace Patents on Beryllium oxide
Experimental / Informatics
List of terms related to Beryllium oxide

Template:Chembox new

Overview

Beryllium oxide (BeO) is a white crystalline oxide. It is obtained from beryllium or beryllium compounds by ignition in the air. The sintered beryllium oxide (beryllia), which is very stable, has ceramic characteristics. It is similar to aluminium oxide (Al₂O₃), is highly fire resistant (melting point: 2570°C), and has polymorphism. Beryllium oxide was previously called glucina.

Beryllium oxide formed at high temperatures (>800°C) is inert but may be easily dissolved in hot aqueous ammonium bifluoride (NH₄HF₂) or a hot solution of concentrated sulfuric acid (H₂SO₄) and ammonium sulfate ((NH₄)₂SO₄).

Applications

This complex is used for rocket engines, catalysts, semiconductors, moderators of atomic reactors, and neutron reflectors.

Beryllium oxide is used in many high-performance semiconductor parts for applications such as radio equipment because it has good thermal conductivity while also being a good electrical insulator. Some power semiconductor devices have used beryllium oxide ceramic to insulate the silicon chip from the metal mounting base of the package in order to achieve a lower value thermal resistance than for a similar construction made with aluminium oxide. It is also used as a structural ceramic for high-performance vacuum tubes, magnetrons, and gas lasers.

Safety

BeO is carcinogenic if the powder is ingested or inhaled and may cause chronic beryllium disease.

References

External links

cs:Oxid beryllnatý de:Berylliumoxid lb:Berylliumoxid fi:Berylliumoksidi

Template:WS