About company Services news Vacancies Contacts Application form +7 (4912) 24-90-62 sales@plasmalabs.ru Product Catalog Home → Industrial ceramics Industrial ceramics OJSC "Plasma" Ryazan has extensive experience in the development and manufacture of products from corundum ceramics. The corundum materials VK94-1 and AI-1 used by us with an alumina content AL2O3 from 94.4 to 99.4%, have good thermal conductivity and heat resistance, low dielectric losses in a wide range of frequencies and temperatures, high values of mechanical and electrical strength and high electrical resistance. Ceramic products made of corundum materials can be brazed: using active metals in a vacuum, after preliminary metallization with refractory metals with copper, nickel and Kovar and NAVI alloys, by means of low-melting and refractory glass solders, in addition, they have high surface hardness, wear resistance and chemical resistance. Products manufactured by OJSC "Plasma" from corundum ceramics have found wide application in various fields of industry and are used as: - high-voltage and high-frequency insulators, current bushings, instrument shells, resistive substrates; - sealing elements of pumps and their working bodies, die holders when working with aggressive and abrasive liquids and gases; - combustion boats used in metallurgical production; - cores (instead of high-strength steels), used in the formation of voids in bricks, which increases the service life by 8-10 times; - tips (nozzles) of gas torches and torches for argon-arc welding, nozzles of sandblasting installations, which increases the resource in comparison with the VK alloy by 2-3 times; - finishing tool; - single and multichannel ceramic insulators and covers for thermocouple heads. Corundum ceramic products are produced in various configurations: rings, cylinders, glasses, tubes, plates, etc. Our company can help you in solving various technological problems and fulfill orders for the manufacture of complex ceramic products according to your drawings and technical requirements: without processing, with machining and surface cleaning of class 7-8, polishing with a surface roughness of class 10-11, with thread , glazed, metallized. Options Ceramic vacuum-tight corundum grade VK94-1 Corundum ceramics grade AI-1 Working temperature ° С -40 ± 1400 up to 1500 Apparent density g / cm³, not less 3.7 3.6 Thermal expansion coefficient 10⁻⁷, 1 / ° С, in the temperature range 20 ± 10 - 200 ° С 60 ± 5 60 ± 5 Thermal expansion coefficient 10⁻⁷, 1 / ° С, in the temperature range 20 ± 10 - 500 ° С 70 ± 5 70 ± 5 Thermal expansion coefficient 10⁻⁷, 1 / ° С, in the temperature range 20 ± 10 - 900 ° С 79 ± 5 79 ± 5 Dielectric constant at a frequency of 10 Hz at a temperature of 25 ± 10 ° С, no more 10.3 10.0 The tangent of the angle of dielectric losses at a frequency of 10 Hz and at a temperature of 20 ± 10 ° С, no more 6x10 4x10⁻⁴ Specific volumetric electrical resistance Ohm * cm at a temperature of 100 ± 5 ° С, not less 10¹³ 10¹³ Static bending strength, kg / cm², not less 3200 2800 Water absorption,%, no more 0.02 0.05-0.5% Product drawings 1 (rar) .rar Product drawings 2 (rar) .rar Product drawings (ceramic cores) .zip Товар изготавливается под заказ. Сроки поставки согласовывайте с менеджером по телефону +7 (4912) 24-90-74 © 1999—2013 ОАО «Плазма» 390023, Россия, г. Рязань ул. Циолковского, 24 Создание сайта Студия Элемент