Composition of beryllium oxide ceramics

被引：0

作者：

G. P. Akishin

S. K. Turnaev

V. Ya. Vaispapir

V. S. Kiiko

I. R. Shein

E. D. Pletneva

M. N. Timofeeva

A. L. Ivanovskii

机构：

[1] TOO KazMetizProm,

[2] OAO Komintern Novosibirsk Plant,undefined

[3] FGAOU VPO First President of Russia B. N. El’tsin Ural Federal University,undefined

[4] Institute of Solid Chemistry,undefined

[5] UrO RAN,undefined

来源：

Refractories and Industrial Ceramics | 2011年 / 51卷

关键词：

ceramics; beryllium oxide; powder; specimen; impurity; sodium carbonate; porosity; density; microcrystals; sintering; dielectric permittivity; dielectric loss angle; color; breakdown voltage;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The physicochemical and electrophysical properties of ceramics based on BeO without impregnation and after impregnation with an aqueous solution of sodium carbonate Na2CO3 are studied. It is established that impregnation leads to preparation of ceramic specimens with a white color, which develop increased porosity, lower amount of impurities and smaller average microcrystal size, although it has little effect on their electrophysical properties. In order to improve these properties considerably it is necessary to increase ceramic density by increasing its sintering temperature by 20 – 40 K. Values of electrical permittivity δ and dielectric loss tangent tg δ are determined for a series of BeO ceramic specimens (732 pieces), having identical geometric dimensions, but prepared from original BeO powder of different batches. Studies show considerable scatter in the distribution of these parameters, which points to a requirement for further improvement of BeO-ceramic preparation technology.

引用

页码：377 / 381

页数：4

共 23 条

[1]

Kiiko VS(1991)Cause of the coloration of beryllium ceramics Inorganic Materials 27 16441646-272

[2]

Dmitriev IA(1992)Effect of iron impurities on the color of beryllium ceramics Inorganic Materials 28 143501440-7

[3]

Kashcheev ID(2004)Transparent beryllia ceramics for laser technology and ionizing radiation dosimetry Refractories and Industrial Ceramics 45 266-28

[4]

Kiiko VS(2004)The state of iron impurities in a beryllium ceramic as determined from NGRS data Ceramics Internat. 30 1-434

[5]

Piratinskaya II(2005)Features of impurity states of lithium and sodium in beryllium oxide ceramics Ogneupory Tekhn. Keram. 12 23-17

[6]

Vereshchagin YA(2004)Microstructure and electrical conductivity of composite (BeO + TiO Refractories and Industrial Ceramics 48 429-693

[7]

Kiiko VS(2004))-ceramic Ogneupory Tekhn. Keram. 10 8-468

[8]

Shabashov VA(1994)Preparation, physicochemical properties and transmission of UHF radiation by ceramic based on BeO Neorgan. Materialy 30 688-undefined

[9]

Kiiko VS(2009)Effect of titanium oxide addition on physicochemical and luminescence properties of beryllia ceramics Refractories and Industrial Ceramics 50 465-undefined

[10]

Dmitriev IA(undefined)Thermal conductivity of beryllium oxide ceramics undefined undefined undefined-undefined

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