{"id":752,"date":"2020-04-10T07:48:44","date_gmt":"2020-04-10T07:48:44","guid":{"rendered":"http:\/\/alalloycasting.com\/?page_id=752"},"modified":"2026-05-26T01:01:15","modified_gmt":"2026-05-26T01:01:15","slug":"ceramic-fiber-paper","status":"publish","type":"page","link":"https:\/\/www.alalloycasting.com\/ru\/ceramic-fiber-paper\/","title":{"rendered":"\u0411\u0443\u043c\u0430\u0433\u0430 \u0438\u0437 \u043a\u0435\u0440\u0430\u043c\u0438\u0447\u0435\u0441\u043a\u043e\u0433\u043e \u0432\u043e\u043b\u043e\u043a\u043d\u0430"},"content":{"rendered":"

Ceramic fiber paper is a lightweight, flexible refractory sheet made from high-purity alumina-silica fibers, engineered to withstand continuous temperatures up to 1260\u00b0C (2300\u00b0F). It serves as a critical thermal barrier, gasket material, and lining insulation across aluminum casting, steel processing, and glass manufacturing. Unlike traditional refractory boards, ceramic fiber paper can be cut, wrapped, and formed to fit irregular surfaces \u2014 making it one of the most versatile insulation materials in high-temperature metalworking.<\/p>\n

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What Is Ceramic Fiber Paper Made Of?<\/h2>\n

Ceramic fiber paper is manufactured through a wet-forming process similar to traditional papermaking, but using inorganic refractory fibers instead of wood pulp. The base fibers \u2014 aluminum oxide (Al\u2082O\u2083) and silicon dioxide (SiO\u2082) \u2014 are blended with organic binders that burn off cleanly during first heat-up, leaving a pure, non-combustible insulation sheet.<\/p>\n

The exact alumina-to-silica ratio determines the paper’s temperature grade. Standard-grade ceramic fiber paper typically contains around 47% Al\u2082O\u2083 and 53% SiO\u2082, suitable for applications up to 1050\u00b0C. High-purity grades push the alumina content above 55%, raising the continuous service temperature to 1260\u00b0C or higher.<\/p>\n

Most manufacturers add a small percentage of organic binder (usually 5\u201310% by weight) to give the paper handling strength before installation. This binder burns out between 300\u2013400\u00b0C, which means the paper becomes slightly more brittle after its first thermal cycle \u2014 something to factor in if you’re planning to remove and reposition it.<\/p>\n

A key distinction worth noting: ceramic fiber paper is\u00a0not<\/strong>\u00a0the same as ceramic fiber blanket or ceramic fiber board. The paper is thinner (typically 0.5 mm to 6 mm), denser, and has a smoother surface finish. It’s designed for precision applications where blanket would be too thick or too loose-fitting.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n
Property<\/th>\nStandard Grade (1050\u00b0C)<\/th>\nHigh-Purity Grade (1260\u00b0C)<\/th>\nHP-Z Grade (1430\u00b0C)<\/th>\n<\/tr>\n<\/thead>\n
Al\u2082O\u2083 Content<\/td>\n44\u201347%<\/td>\n52\u201355%<\/td>\n35\u201340% (+ ZrO\u2082)<\/td>\n<\/tr>\n
SiO\u2082 Content<\/td>\n53\u201356%<\/td>\n45\u201348%<\/td>\n40\u201345%<\/td>\n<\/tr>\n
ZrO\u2082 Content<\/td>\n\u2014<\/td>\n\u2014<\/td>\n15\u201320%<\/td>\n<\/tr>\n
Continuous Use Temp<\/td>\n1050\u00b0C \/ 1922\u00b0F<\/td>\n1260\u00b0C \/ 2300\u00b0F<\/td>\n1430\u00b0C \/ 2600\u00b0F<\/td>\n<\/tr>\n
\u041f\u043b\u043e\u0442\u043d\u043e\u0441\u0442\u044c<\/td>\n160\u2013190 kg\/m\u00b3<\/td>\n180\u2013210 kg\/m\u00b3<\/td>\n200\u2013240 kg\/m\u00b3<\/td>\n<\/tr>\n
Thermal Conductivity (600\u00b0C)<\/td>\n0.08\u20130.10 W\/m\u00b7K<\/td>\n0.09\u20130.11 W\/m\u00b7K<\/td>\n0.10\u20130.12 W\/m\u00b7K<\/td>\n<\/tr>\n
Organic Binder Content<\/td>\n5\u20138%<\/td>\n5\u20138%<\/td>\n5\u20138%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Data aligned with classifications per ASTM C892 Standard Specification for High-Temperature Fiber Blanket Thermal Insulation. Exact values vary by manufacturer and lot.<\/em><\/p>\n

\"A
A roll of ceramic fiber paper, suitable for lining furnace surfaces, gaskets, and under-refractory coatings in high-temperature industrial equipment.<\/em><\/figcaption><\/figure>\n

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Why Use Ceramic Fiber Paper Instead of Traditional Refractory Gaskets?<\/h2>\n

I’ve seen plant engineers default to compressed asbestos-free gaskets or graphite sheets for high-temperature sealing, and in many cases those materials work fine \u2014 up to a point. The problem shows up when you’re dealing with temperatures above 800\u00b0C, molten metal splash zones, or joints that need to accommodate thermal expansion without cracking.<\/p>\n

Ceramic fiber paper handles all three. It compresses under bolt load to fill surface imperfections, it won’t melt or degrade at casting temperatures, and it doesn’t become rigid after thermal cycling the way calcium silicate boards do.<\/p>\n

In aluminum foundries specifically, ceramic fiber paper sees heavy use as:<\/p>\n