The influence of the technological parameters on the properties of quartz ceramic

Borodai, F. Ya.; Suzdal’tsev, E. I.

doi:10.1007/bf01288019

Cited by 5 publications

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“…Data from Borodai and Suzdal'tsev [1975] .........10 Berman [1952], Berman et al [1960], Alterovitz et al [1975], Nemoto et al [1985], and citations therein] Data from Burk [1962] and Touloukian et al [1977;citations therein] Data from Wachtman et al [1962] and Touloukian et al [1977;citations therein] Data from Gmelin [1967;1969] (sintered) and Barron et al [1959] Burk [1962] and Touloukian et al [1977;citations therein] Breaking strength of annealed soda-lime glass rods vs. temperature for three periods of load application.…”

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confidence: 99%

Cryogenic Properties of Inorganic Insulation Materials for ITER Magnets: A Review

Simon¹

1994

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mentioning

confidence: 99%

Cryogenic Properties of Inorganic Insulation Materials for ITER Magnets: A Review

Simon¹

1994

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“…The dielectric permittivity of SCFS, Pyroceram 9606, and alumina in the temperature range of 25-500 C are 1%, 2.7%, and 4.8%, respectively, whereas in the range of 25-1000 C, they are about 3%, 6.2%, and 18%, respectively [1]. The change in the e value of SCFS up to 1200 C is only about 4%, and this value does not increase above 4.1% even when it melts at temperatures in the range of 1800-2000 C [40,41,[50][51][52][53][54]. The low thermal conductivity of SCFS keeps high temperatures limits within a thickness of about 0.5 mm from outer surface when it is subjected to unilateral heating and due to which its electronic properties do not vary much upon exposure to high temperatures.…”

Section: Beryllium Oxide and Boron Nitridementioning

confidence: 96%

Slip-Cast Fused Silica Radomes for Hypervelocity Vehicles: Advantages, Challenges, and Fabrication Techniques

Ganesh¹,

Mahajan²

2020

Handbook of Advanced Ceramics and Composites

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Today, the development of ceramic radome materials for hyper velocity (> Mach 5) missiles is a top research priority for several countries for the purposes of both surveillance and combat. The ceramic materials with low and stable dielectric properties against frequency and temperature variation among others are especially important. The radome property requirement for missiles launched from surface-toair, air-to-surface, and air-to-air differs considerably. Moisture absorbing materials despite having desired dielectric and thermal properties are not suitable for radome applications as the dielectric constant of water is considerably huge (80.4). So far no single material has been identified to meet all the requirements of a high-speed radome application. The advantages and disadvantages associated with various ceramic radome materials have been presented and discussed in this chapter together with the information about the radome design with respect to the wall thickness vs. radar frequency (RF) signals, bore-sight error, and the importance as well as generation principle of Ogive radome shape. Among various materials investigated so far, the slip-cast fused silica (SCFS) has been identified to be superior for hypervelocity radome applications. Furthermore, SCFS radomes can be fabricated with near-net shape using aqueous colloidal suspensions. However, SCFS radomes suffer from poor mechanical strength and from low rain and abrasion resistance properties apart from having considerably high internal porosity (up to 18%). Various methods employed so far to improve the properties of SCFS radomes required for hypervelocity applications have been reviewed in this chapter while citing all the important references. Among the various fused-silica composites, the Nitroxyceram (SiO 2-BN-Si 3 N 4 composite) exhibits the best combination of properties required for radome applications, and it can be consolidated and densified by following conventional powder processing techniques prevalent at industry.

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Slip-Cast Fused Silica Radomes for Hypervelocity Vehicles: Advantages, Challenges, and Fabrication Techniques

Ganesh

Mahajan

2020

Handbook of Advanced Ceramics and Composites

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The influence of the technological parameters on the properties of quartz ceramic

Cited by 5 publications

References 0 publications

Cryogenic Properties of Inorganic Insulation Materials for ITER Magnets: A Review

Cryogenic Properties of Inorganic Insulation Materials for ITER Magnets: A Review

Slip-Cast Fused Silica Radomes for Hypervelocity Vehicles: Advantages, Challenges, and Fabrication Techniques

Slip-Cast Fused Silica Radomes for Hypervelocity Vehicles: Advantages, Challenges, and Fabrication Techniques

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