{"id":56156,"date":"2026-06-18T15:31:21","date_gmt":"2026-06-18T07:31:21","guid":{"rendered":"https:\/\/krceramicfiber.com\/?p=56156"},"modified":"2026-06-18T15:31:21","modified_gmt":"2026-06-18T07:31:21","slug":"r-value-of-ceramic-fiberboard-a-key-indicator-for-high-temperature-insulation","status":"publish","type":"post","link":"https:\/\/krceramicfiber.com\/id\/r-value-of-ceramic-fiberboard-a-key-indicator-for-high-temperature-insulation\/","title":{"rendered":"R-value of Ceramic Fiberboard: A Key Indicator for High-Temperature Insulation"},"content":{"rendered":"

The R-value (thermal resistance) is an important parameter for measuring the thermal insulation performance of a material. Its calculation formula is R = thickness \/ thermal conductivity (\u03bb). A higher R-value indicates better thermal insulation performance at the same thickness.<\/p>\n

Ceramic fiberboard<\/strong><\/a> is a rigid refractory material made primarily from aluminosilicate fibers using a vacuum forming process. Its thermal conductivity is extremely low\u2014only 0.03 W\/(m\u00b7K) at room temperature, and only one-fifth that of clay bricks at 1000\u2103. This excellent characteristic makes it an ideal high-temperature insulation material.<\/p>\n

\"ceramic<\/p>\n

The R-value of ceramic fiberboard is not a fixed value but varies with several factors:<\/p>\n

Operating temperature: Thermal conductivity increases with increasing temperature. Taking a product with a density of 285 kg\/m\u00b3 as an example, its thermal conductivity is approximately 0.085 W\/(m\u00b7K) at 400\u2103, rising to 0.132 W\/(m\u00b7K) at 800\u2103, and reaching 0.180 W\/(m\u00b7K) at 1000\u2103.<\/p>\n

Product Density and Processing: Due to the presence of binders and higher density, ceramic fiber boards typically have a slightly higher thermal conductivity than ceramic fiber blankets at the same temperature. Therefore, for the same thickness, the R-value is relatively low.<\/p>\n

Board Thickness: The R-value is directly proportional to the thickness; the greater the thickness, the higher the thermal resistance.<\/p>\n

In practical engineering applications, engineers often use thermal conductivity as the design basis, and then calculate the corresponding R-value based on the specific thickness and operating temperature. Ceramic fiber boards, with their low thermal conductivity, lightweight (density 64~500 kg\/m\u00b3), and excellent thermal shock resistance, are widely used in kiln linings, high-temperature equipment insulation, and fire barriers.<\/p>","protected":false},"excerpt":{"rendered":"

The R-value (thermal resistance) is an important parameter for measuring the thermal insulation performance of … Read more<\/a><\/p>","protected":false},"author":1,"featured_media":15761,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,3],"tags":[],"class_list":["post-56156","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-news","category-news","no-featured-image-padding","resize-featured-image"],"yoast_head":"\nR-value of Ceramic Fiberboard: A Key Indicator for High-Temperature Insulation - Your Thermal insulation material Manufactruer | Kerui Refractory\u00ae Official Website<\/title>\n<meta name=\"description\" content=\"The R-value (thermal resistance) is an important parameter for measuring the thermal insulation performance of a material.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/krceramicfiber.com\/id\/r-value-of-ceramic-fiberboard-a-key-indicator-for-high-temperature-insulation\/\" \/>\n<meta property=\"og:locale\" content=\"id_ID\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"R-value of Ceramic Fiberboard: A Key Indicator for High-Temperature Insulation - 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