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Beryllium Oxide

Beryllium Oxide. Beryllium oxide (BeO) is a white crystalline oxide. It occurs in nature as the mineral "Bromellite". ... Boiler (oil-fired) additives: Raises melting point of ash generated to produce a friable material that is easily removed; reduced corrosion of steel pipes holding steam as well as sulfur emissions into the environment:

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Evaluation of High-Fired Beryllium Oxide Digestion Methods to …

Several digestion methods were tested to determine their effectiveness on high-fired BeO (ceramic BeO that has been heated to a temperature of approximately 1450 degrees C). High fired BeO is an extremely insoluble, refractory compound that may be present at some DOE sites. Because of the toxicity of air-borne BeO particulates, detection and measurement of high …

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Thermal Conductivity of Beryllium Oxide From 40° to 750° C

rod of high-fired beryllium oxide, surrounded by a tube lI·ith matching temperature gradient to minimize radial heat loss. The estimated accurncy of the measurements is about 3 percent. However, the values of thermal conductivity of the ideal beryllium oxid e crystal arc probably

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Defense Programs Beryllium Good Practice Guide

2. Fabrication of beryllium oxide ceramic components for nuclear weapons. The principal operation consists of diamond grinding, high-precision machining of ceramic pieces that are primarily purchased from a vendor. 3. Ceramic hot press where beryllium oxide powder is mixed with other compounds, pressed into the desired shape, and fired in a ...

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[PDF] Evaluation of High-Fired Beryllium Oxide Digestion …

Several digestion methods were tested to determine their effectiveness on high-fired BeO (ceramic BeO that has been heated to a temperature of approximately 1450 degrees C). High fired BeO is an extremely insoluble, refractory compound that may be present at some DOE sites. Because of the toxicity of air-borne BeO particulates, detection and measurement of high …

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Beryllium Oxide

Beryllium Oxide is a type of radiation dosimeter that competes with LiF:Mg, Ti in sensitivity and is commonly used as a thermally stimulated exoelectron emission (TSEE) dosimeter. ... cells and found that the genotoxicity of beryllium oxides is influenced by the temperature at which the oxides are fired. To examine this in vitro, primary rat ...

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(PDF) Preparation, certification and interlaboratory analysis of

Sample matrices of interest include aerosols, surface samples, ores, soils, beryllium metal, beryllium oxide (including high-fired BeO), and beryllium alloys. Samples of concern for occupational ...

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Applications and Uses of Beryllium Oxide (BeO)

Beryllium oxide ceramics are also used in the medical industry to enhance health equipment, such as medical lasers and diagnostic imaging equipment. The non-toxic properties of BeO in ceramic application and wear endurance make the product highly suitable for use in lightless and very selective areas.

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Beryllium Oxide

BeO is carcinogenic in powdered form and may cause a chronic allergic-type lung disease berylliosis. Once fired into solid form, it is safe to handle if not subjected to machining that generates dust. Clean breakage releases little dust, but …

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Genotoxicity and Carcinogenicity

Wistar rats received intratracheal instillations of 1 mg of beryllium oxide (low-fired) once a week for 15 weeks (Ishinishi et al. 1980). An adenocarcinoma, a squamous-cell carcinoma, and four adenomas were observed in the lungs of 30 beryllium-treated rats and no …

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Beryllium oxide

Beryllium oxide (BeO), also known as beryllia, is an inorganic compound with the formula BeO. This colourless solid is an electrical insulator with a higher thermal conductivity than any other non-metal except diamond, and exceeds that of most metals. [12] As an amorphous solid, beryllium oxide is white.Its high melting point leads to its use as a refractory material. [13]

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Beryllium Hazard: An Overview on Regulation …

According to OSHA, workers who have been exposed to beryllium can be at an increased risk of developing chronic beryllium disease (CBD), berylliosis and lung cancer. OSHA states that the final rule changes are meant …

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BERYLLIUM in Air 7704 by Field-Portable Fluorometry

tory materials such as high-fired beryllium oxide, agitation of the dissolution solution with the media must be replaced by heating to 80 °C for 30 minutes. Any standard dissolution process is particle-size dependent. The two sources of BeO used to validate the method are described in the backup data report [6]. 6.

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산화 베릴륨

산화 베릴륨은 알칼리 토금속의 산화물 중에서는 유일하게 공유 결합 물질로 간주된다. 이는 베릴륨의 원자 크기가 다른 2족 원소에 비해 상대적으로 작은 것에 기인한다. 같은 이유로 산화 베릴륨은 양쪽성 물질이다. 물이나 질산에는 녹지않지만, 진한 …

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BERYLLIUM AND BERYLLIUM COMPOUNDS (CICAD 32, 2001)

Low-fired beryllium oxide is predominantly made up of poorly crystallized small particles, which are more soluble and reactive, whereas higher firing temperatures result in less reactivity due to increasing crystal size. Although the solubility of the low-fired crystals is 10 times that of the high-fired crystals, it should be pointed out that ...

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POTENTIAL FOR HUMAN EXPOSURE

The major anthropogenic emission source to the environment is the combustion of coal and fuel oil, which releases particulates and fly ash that contain beryllium into the atmosphere ().Other anthropogenic processes, such as ore processing, metal fabrication, beryllium oxide production and use, and municipal waste combustion, release only a fraction of the amounts emitted from …

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Beryllium

Beryllium oxide (called beryllia) is known for its high heat capacity and is an important component of certain sensitive electronic equipment. Beryllium alloys are classified into two types: high …

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Beryllium Oxide Machining and Grinding

San Jose Delta maintains an extensive in-house inventory of certified Materion beryllia ceramic machining stock, including BW-1000, a higher strength and finer grain berylia,. While the grinding of beryllium oxide requires stringent dust control during the grinding process (see health and safety below) it otherwise machines like other technical ceramics of the similar density and […]

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Sampling and Analytical Considerations for Beryllium

High fired (1450 o C) beryllium oxide (BeO) also known as Beryllia is a ceramic material that has unique electrical and thermal conductivity properties making it useful in electronic devices. …

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Beryllium Laboratory Analysis

Laboratory analysis for beryllium samples has always presented a challenge to the analytical community. While most metals of interest to industrial hygienists have occupational exposure limits (OELs) in milligrams per cubic meter (mg/m …

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Semiconductor Components | Packaging | By Material

Alumina - High Temperature Co-fired Ceramic (HTCC) Alumina (Al2O3) has been utilized in the electronic industry since the 1940s and features several important physical and electrical characteristics that make it a prime candidate for high-reliability applications: ... Beryllium Oxide (BeO) ceramic is an electronic packaging material well-suited ...

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Some properties of porous ceramics made of beryllium oxide

MADE OF BERYLLIUM OXIDE I.YA.GUZMAN AND D.N. POLUBOYNARINOV (Mendeleyev Chemical-Technological Institute) Inasmuch as it possess high refractoriness, chemical ... fired in corundura capsules at 750oc for 2 hours. The properties of the porous refractories -- thermal conductivity, strength, gas permeability and so on -- are ...

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Toxicology of High-Fired Beryllium Oxide Inhaled by Rodents

Request PDF | Toxicology of High-Fired Beryllium Oxide Inhaled by Rodents | • Several groups of male and rats and hamsters were exposed by inhalation to an aerosol of BeO particles ...

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Beryllium Oxide Design Guide

As-fired flatness is typically 0.004" /''. Tighter tolerances are achievable, but are obtained with additional machining processes resulting in increased costs. HEALTH & SAFETY NOTE Handling beryllium oxide ceramics in solid form poses no special health risk. Like many industrial materials, beryllium-containing materials may pose a health

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Beryllium and Compounds (as Be)

compounds vary. The major forms of beryllium encountered industrially are: beryllium metal, beryllium alloys (mainly aluminum or copper), and beryllium compounds (beryllium fluoride, beryllium hydroxide, and beryllium oxide). Beryllium Synonyms: elemental beryllium (Be); glucinum (Gl) Solubility: insoluble in water . IMIS number. 8: 0360

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Toxicology of high-fired beryllium oxide inhaled by rodents. II

Toxicology of high-fired beryllium oxide inhaled by rodents. II. Metabolism and early effects Arch Environ Health. 1975 Nov;30(11):546-51. doi: 10.1080/00039896.1975.10666773. Authors C L Sanders, W C Cannon, G J Powers, R R Adee, D M Meier. PMID: 1217915 DOI: 10.1080 ...

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Beryllium Oxide (BeO) Ceramic PCB

Beryllium Oxide (BeO) Ceramic PCB Beryllium oxide (BeO) ceramics, commonly known as beryllia ceramics, are a type of ceramic composed predominantly of exceptionally pure beryllium oxide, constituting up to 99% of its composition. ... HTCC (High-Temperature Co-Fired Ceramic) HTCC differs from LTCC in baking temperature, as HTCC undergoes baking ...

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[Studies on the effects of beryllium oxide in purity and fired

Among various beryllium (Be) compounds, beryllium oxide (BeO) has so far been noted as a causative substance which introduce chronic pulmonary berylliosis. In our study, chronic …

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Beryllium and Beryllium Compounds

Today, practically all of the beryllium oxide produced commercially is calcined at temperatures of 1000 °C or higher and is referred to as 'high-fired'. Beryllium oxide that is calcined at temperatures lower than 1000 °C is referred to as 'low-fired' it consists of poorly crystallized, small particles which are more reactive and more ...

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Beryllium is Easy to Detect Using the Be Finder® Method. Be Finder® is a method for detecting particulates of beryllium and its compounds by optical fluorescence. This methodology does not require expensive set-up and can yield results within an hour. The method entails wiping the surface suspected of having beryllium contamination with a ...

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