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  • BSI
    BS 4789:1972 Specification for ceramic components for use in envelopes for electronic tubes
    Edition: 1972
    $313.97
    / user per year

Description of BS 4789:1972 1972

This British Standard covers the requirements for fabricated ceramic parts suitable for joining to metal to form the envelopes for electronic tubes (Category 1) and for special materials (Categories 2 and 3) which are in addition suitable for high power microwave windows.

It specifies the limits for values of properties for the different categories. For special applications when a purchase order calls for a requirement different from this standard the purchase order shall prevail.

This standard makes reference to and should be read in conjunction with BS 1598:1964.

NOTE The titles of the British Standards referred to in this standard are listed on page iii.



Lists the definitions, properties and test methods and gives the test schedules for type, batch and component testing of three categories of ceramic material suitable for use in electronic tube envelopes.

Standard NumberBS 4789:1972
TitleSpecification for ceramic components for use in envelopes for electronic tubes
StatusConfirmed
Publication Date1972-03-30
DescriptorsSpecimen preparation, Thermal testing, Thermal conductivity, Test equipment, Visual inspection (testing), Electron tubes, Type testing, Permittivity, Mechanical testing, Vacuum tubes, Breaking load, Dimensions, Solid electrical insulating materials, Acid-resistance tests, Electrical resistivity, Microwave tubes, Ceramics, Pressure testing, Dissipation factor, Electronic equipment and components, Testing conditions, Strength of materials, Electron tube structure, Deformation, Test specimens, Electrical insulating materials, Electron tube components
ICS81.060.20 Ceramic products
CommitteeEPL/47
ISBN0 580 06699 1
PublisherBSI
Pages20

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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