{"id":3290,"date":"2026-04-27T14:52:47","date_gmt":"2026-04-27T06:52:47","guid":{"rendered":"https:\/\/www.c-adtech.com\/?p=3290"},"modified":"2026-04-27T15:36:11","modified_gmt":"2026-04-27T07:36:11","slug":"ceramic-fiber-insulation-sheet-for-furnace-lining-and-insulation-2300f-2600f-specs","status":"publish","type":"post","link":"https:\/\/www.c-adtech.com\/ja\/ceramic-fiber-insulation-sheet-for-furnace-lining-and-insulation-2300f-2600f-specs\/","title":{"rendered":"\u7089\u306e\u30e9\u30a4\u30cb\u30f3\u30b0\u304a\u3088\u3073\u7d76\u7e01\u6750\u306e\u305f\u3081\u306e\u9676\u78c1\u5668\u7e4a\u7dad\u306e\u7d76\u7e01\u6750\u30b7\u30fc\u30c8: 2300\u00b0F - 2600\u00b0F Specs"},"content":{"rendered":"

Ceramic fiber insulation sheets<\/a> are rigid or semi-rigid flat-format refractory insulation products manufactured from high-temperature alumina-silica ceramic fibers consolidated with inorganic binders into precise, dimensionally stable panels used for furnace lining, kiln construction, backup insulation, and high-temperature process equipment thermal barriers. Available in continuous service temperature ratings from 2300\u00b0F (1260\u00b0C) to 2600\u00b0F (1430\u00b0C) and above, ceramic fiber insulation sheets outperform blanket products in applications requiring flat, load-bearing surfaces, precise dimensional tolerances, and resistance to gas velocity erosion at the hot face.<\/p>\n

If your project requires the use of Ceramic Fiber Insulation Sheet, you can contact us<\/a>\u00a0for a free quote.<\/span><\/p>\n

At AdTech, we supply ceramic fiber insulation sheets to aluminum casthouse operators, steel heat treatment facilities, industrial kiln builders, and OEM furnace manufacturers,\u00a0 ceramic fiber insulation sheets solve the specific problems that blanket and loose fiber products cannot \u2014 they provide a self-supporting, machinable, cuttable thermal barrier that maintains its geometry under compression loading and gas flow conditions where flexible blanket would erode, compress unevenly, or fail to maintain dimensional accuracy. If your application requires flat insulation surfaces, tight thickness tolerances, or a rigid thermal barrier that can be cut to complex shapes, ceramic fiber insulation sheets in the 2300\u00b0F to 2600\u00b0F range are the correct product family to evaluate.<\/p>\n

\"Ceramic
Ceramic Fiber Insulation Sheet for Furnace Lining and Insulation<\/figcaption><\/figure>\n

What Is a Ceramic Fiber Insulation Sheet? Composition and Manufacturing<\/h2>\n

The term “ceramic fiber insulation sheet” is used in the market to describe several related but distinct product formats. Understanding the differences is essential before making a procurement decision.<\/p>\n

Product Format Clarification<\/h3>\n

In commercial practice, “ceramic fiber insulation sheet” refers to products in three main formats:<\/p>\n

Rigid ceramic fiber board:<\/strong>\u00a0A dense, rigid panel manufactured through a wet-forming process similar to papermaking, where ceramic fibers are dispersed in water with inorganic binders, formed into a sheet on a moving screen, pressed to remove water, and then dried and fired to create a rigid, dimensionally stable product. This is the most common format sold as “ceramic fiber sheet” or “ceramic fiber board” in industrial markets.<\/p>\n

Vacuum-formed rigid shapes:<\/strong>\u00a0Ceramic fiber products formed by vacuum-depositing fiber slurry onto shaped molds, producing panels with complex geometries and excellent surface finish. These are used for precision insulation applications in semiconductor processing equipment and aerospace.<\/p>\n

Semi-rigid needled sheets:<\/strong>\u00a0Needle-punched ceramic fiber blanket compressed and set at a defined thickness and density, producing a semi-rigid product with better handling characteristics than standard flexible blanket. Less rigid than wet-formed board but more structured than loose blanket.<\/p>\n

For this article, we focus primarily on wet-formed rigid ceramic fiber board\/sheet \u2014 the product most commonly specified for furnace lining applications in the 2300\u00b0F to 2600\u00b0F temperature range.<\/p>\n

Raw Material Composition<\/h3>\n

The thermal performance capability of a ceramic fiber insulation sheet is determined primarily by its fiber composition.<\/p>\n

Standard 2300\u00b0F Grade (1260\u00b0C):<\/strong>
\nFibers contain 52\u201356% alumina (Al\u2082O\u2083) and 44\u201348% silica (SiO\u2082). This elevated alumina content compared to standard-grade ceramic fiber (which typically runs 44\u201347% Al\u2082O\u2083) improves resistance to devitrification \u2014 the phase transformation from amorphous glass to crystalline mullite and cristobalite that causes fiber shrinkage and embrittlement at high temperature.<\/p>\n

2600\u00b0F Grade (1430\u00b0C):<\/strong>
\nFibers incorporate zirconia (ZrO\u2082) typically at 14\u201317% by weight, with alumina at 33\u201336% and silica at 47\u201350%. The zirconia addition stabilizes the amorphous fiber structure at temperatures where even high-alumina fibers would undergo unacceptable devitrification. This is the defining characteristic of the 2600\u00b0F grade \u2014 not simply more alumina, but a fundamentally different fiber chemistry involving a third oxide component.<\/p>\n

Binder system:<\/strong>\u00a0The inorganic binder that holds fibers together in the rigid sheet structure is typically colloidal silica, colloidal alumina, or a combination of both. These sol-based binders provide the green strength needed during manufacturing and, after firing, create ceramic necks between fiber contacts that give the finished sheet its rigidity and compressive strength. Some manufacturers use calcium aluminate cement as the binder, which provides slightly higher compressive strength at the cost of some chemical impurity.<\/p>\n

Manufacturing Process for Rigid Ceramic Fiber Board<\/h3>\n
\"MANUFACTURING
MANUFACTURING PROCESS FORRIGID CERAMIC FIBER BOARD<\/figcaption><\/figure>\n

Step 1: Fiber preparation:<\/strong>\u00a0Bulk ceramic fiber (produced by melt-blowing or spinning) is opened and de-clumped in water to form a uniform fiber suspension at very low concentration (typically less than 1% by weight).<\/p>\n

Step 2: Slurry formulation:<\/strong>\u00a0Colloidal binder, flocculants, and retention aids are added to the fiber suspension to create a stable, well-dispersed slurry.<\/p>\n

Step 3: Sheet forming:<\/strong>\u00a0The slurry is deposited onto a flat forming screen or into a mold. Water drains through the screen under gravity and vacuum, consolidating the fibers into a wet mat of relatively uniform thickness and density.<\/p>\n

Step 4: Pressing:<\/strong>\u00a0The wet mat is mechanically pressed to remove additional water and achieve the target density and thickness. Press pressure directly controls final product density and, consequently, mechanical strength and thermal conductivity.<\/p>\n

Step 5: Drying:<\/strong>\u00a0The pressed mat is dried in heated ovens to remove remaining moisture without thermal damage to the fiber structure. Drying conditions are carefully controlled to prevent surface cracking from rapid moisture gradient.<\/p>\n

Step 6: Firing (optional):<\/strong>\u00a0Some manufacturers fire the dried board at elevated temperature to develop a more complete ceramic bond and to stabilize the product against in-service shrinkage. Fired boards have better dimensional stability but may have slightly higher brittleness.<\/p>\n

Step 7: Cutting and finishing:<\/strong>\u00a0Dried and fired boards are sawn to standard dimensions, surface-ground if required for dimensional precision, and inspected for defects.<\/p>\n

2300\u00b0F vs. 2600\u00b0F Grade: Fiber Chemistry and Temperature Performance<\/h2>\n

This comparison is the first decision point in any specification process, and the choice has significant cost and performance implications.<\/p>\n

What Separates the Two Temperature Grades<\/h3>\n

The 2300\u00b0F and 2600\u00b0F grades are not simply different formulations of the same product \u2014 they represent meaningfully different material systems with different fiber chemistry, different cost structures, and different performance profiles.<\/p>\n

Thermal stability mechanism in 2300\u00b0F grade:<\/strong>\u00a0The elevated alumina content (52\u201356% Al\u2082O\u2083) slows the devitrification process compared to standard-grade fiber. At temperatures up to 1260\u00b0C continuous, the fiber remains predominantly amorphous and retains its insulating properties. Above 1260\u00b0C, progressive crystallization causes shrinkage at an accelerating rate \u2014 which is why the rated temperature is a genuine limit, not a conservative estimate.<\/p>\n

Thermal stability mechanism in 2600\u00b0F grade:<\/strong>\u00a0Zirconia (ZrO\u2082) functions as a crystal structure stabilizer in the fiber matrix. It disrupts the crystallization process and extends the temperature range over which the fiber remains amorphous and dimensionally stable. This is not a marginal improvement \u2014 zirconia-containing fibers show dramatically less shrinkage at 1350\u20131430\u00b0C than high-alumina fibers without zirconia.<\/p>\n

Performance Comparison at Key Temperatures<\/h3>\n
\n\n\n\n\n\n\n\n\n\n\n
Temperature<\/th>\n2300\u00b0F Grade Behavior<\/th>\n2600\u00b0F Grade Behavior<\/th>\nPractical Implication<\/th>\n<\/tr>\n<\/thead>\n
800\u00b0C (1472\u00b0F)<\/td>\nFully stable, <0.5% shrinkage<\/td>\nFully stable, <0.5% shrinkage<\/td>\nBoth grades perform identically<\/td>\n<\/tr>\n
1000\u00b0C (1832\u00b0F)<\/td>\nStable, <1.0% shrinkage<\/td>\nStable, <0.5% shrinkage<\/td>\nMinimal difference<\/td>\n<\/tr>\n
1200\u00b0C (2192\u00b0F)<\/td>\nStable with adequate margin<\/td>\nFully stable<\/td>\n2300\u00b0F grade has reasonable margin<\/td>\n<\/tr>\n
1260\u00b0C (2300\u00b0F)<\/td>\nAt continuous service limit<\/td>\nComfortable operating zone<\/td>\nCritical threshold for 2300\u00b0F grade<\/td>\n<\/tr>\n
1350\u00b0C (2462\u00b0F)<\/td>\nApproaching failure (excessive shrinkage)<\/td>\nStable, <1.5% shrinkage<\/td>\n2300\u00b0F grade not acceptable<\/td>\n<\/tr>\n
1430\u00b0C (2600\u00b0F)<\/td>\nSignificant devitrification failure<\/td>\nAt continuous service limit<\/td>\nOnly 2600\u00b0F grade viable<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

When to Choose 2300\u00b0F Grade<\/h3>\n

The 2300\u00b0F (1260\u00b0C) grade is the correct specification when:<\/p>\n