Product Details
Zirconia-Containing Microsilica
It is particularly suited for heavy-duty applications such as high-temperature wear resistance, thermal shock cycling, slag penetration, and high-speed material erosion. Its ultrafine particles can integrate into the matrix particle size distribution, filling the microscopic voids between aggregates, fine alumina powder, and binders, and improving the high-temperature matrix structure through a zirconia-based second phase.
Product Overview
Zr-105 Reinforced Zirconia Silica Fume is an ultrafine functional powder primarily composed of amorphous SiO₂ and containing ZrO₂ and zirconia-silica composite components. The product undergoes collection, classification, homogenization, and batch quality control, and is primarily used in high-performance refractory castables, high-temperature wear-resistant materials, and functional ceramic systems.
Product Advantages
For Zr-105, it is recommended to maintain the SiO₂ + ZrO₂ content at 95% or higher, which is higher than that of Zr-104 and makes it more suitable for refractory materials requiring high levels of wear resistance, scour resistance, and thermal shock stability.
Focus on controlling Fe₂O₃, CaO, MgO, and alkali metal oxides to minimize the impact of low-melting-point impurities on high-temperature liquid phase behavior, refractoriness, and volume stability.
By controlling particle size, specific surface area, color, and fluctuations in chemical composition through grading and impurity removal, we ensure that different batches maintain good consistency in terms of water demand, dispersibility, and post-curing performance.
Zr-105 is not merely a simple upgrade of ordinary Silica Fume, but rather a functional Silica Fume designed specifically for high-temperature wear, thermal cycling, slag penetration, and molten metal erosion conditions.
Technical Data
| Test Item | Typical Value | ASTM C1240 |
|---|---|---|
| SiO₂ + ZrO₂ Content | 96.22 % | 85.0 % Minimum |
| Moisture Content | 0.33 % | 3.0% Maximum |
| Loss on Ignition | 0.82 % | 6.0% Maximum |
| Specific Surface Area | 15,000 m²/Kg | 15,000 m²/Kg Minimum |
| Bulk Density | 280–400 Kg/m³ | Regarding encryption and packaging status |
| Average particle size D50 | 1.0 um | Laser Particle Size Analysis |
| 45 μm sieve residue | 1.207 % | 10.0 % Maximum |
| ZrO₂ | 2.82 % | XRF Analysis |
| Al₂O₃ | 0.21 % | XRF Analysis |
| Fe₂O₃ | 0.23 % | XRF Analysis |
| MgO | 0.19 % | XRF Analysis |
| CaO | 0.32 % | XRF Analysis |
| Na₂O＋K₂O | 0.243 % | XRF Analysis |
| pH | 2.5 – 5.0 | Testing of aqueous solutions or suspensions |
| Major Silica Phases | Amorphous SiO₂ | XRD Analysis |
| Zirconia Phase Composition | ZrO₂ and Zirconia-Silica Composite Phase | XRD Analysis |
The data listed above is for reference only and does not constitute factory control specifications or acceptance criteria. Customers should conduct trials within their own systems to confirm product suitability.
Performance Comparison
Based on existing formulation tests, this section shows reference performance improvement from the micro-filling effect and pozzolanic reaction of silica fume. Actual results vary with matrix type, mix design, dosage, dispersion and process conditions, so sample testing is recommended.
Silica Fume Applications
Suitable for blast furnace main channels, branch channels, slag channels, slag skimmers, swing nozzles, tilting channels, and the receiving section of the taphole.
Suitable for the impact zone of molten iron ladles, localized working linings of torpedo ladles, KR desulfurization agitator heads, and molten iron transfer channels.
Suitable for ladle permanent linings, partial working linings, ladle bottom impact zones, high-temperature flow channels, and functional precast components.
Suitable for cement kiln mouths, kiln door covers, coal injection pipes, tertiary air ducts, grate coolers, discharge ports, and high-temperature air duct elbows.
Suitable for grate furnaces, secondary combustion chambers, rotary kiln incinerators, melting furnaces, high-temperature flue ducts, and areas subject to ash and slag erosion.
Suitable for copper smelting furnaces, aluminum smelting equipment, holding furnaces, metal flow channels, burner bricks, high-temperature wear-resistant blocks, and functional precast components for industrial furnaces and kilns.
Quality Control
Packaging and Logistics
Suitable for small batches, experiments, and sporadic use.
Suitable for engineering projects and industrial use, and designed for both container loading and transshipment.
Match pallets, labels, inner liners, and export documentation according to project requirements.
FAQ
Answers to common purchasing questions about packaging, export documents, sample trials, loading and delivery.
Zr-105 Zirconia Silica Fume is an upgraded, high-end composite material developed for extreme thermal shock and ultra-high-temperature industrial environments. As the top-of-the-line model in the specialized Silica Fume series, Zr-105 further optimizes the microscopic eutectic structure of zirconia (ZrO₂) and amorphous silica (SiO₂) compared to Zr-104. Not only does it offer superior ultra-fine powder filling effects, but it also demonstrates significantly greater fracture toughness than traditional Silica Fume with a ZrO₂ content of 92% or higher when resisting high-temperature melt erosion at 1650°C, preventing thermal stress cracking, and withstanding extreme cooling/heating cycles (thermal shock resistance). It is currently the core modifier for heavy-duty industrial furnace linings.
In the formulations of high-performance refractory castables (such as fluidized-bed boiler linings, blast furnace taphole castables, and ladle systems), the introduction of Zr-105 can trigger a “phase transformation toughening” effect at the microscopic level. It significantly reduces the water consumption per unit during construction and increases the bulk density of the green body; after high-temperature sintering, the zircon phase formed by Zr-105 effectively inhibits the propagation of microcracks. These unique physical properties set it far apart from conventional 95 Silica Fume or ordinary industrial silica fume in terms of resistance to slag erosion and ultra-high wear resistance.
Zr-105 is subject to extremely stringent control of its physical specifications. Its particles are predominantly perfectly spherical, and the multi-peak particle size distribution provides a superior ball-bearing effect. In terms of density, it achieves superior dispersion and, due to its extremely high reactivity, perfectly fills the micropores of refractory aggregates, thereby significantly reducing the material’s apparent porosity and enhancing overall volumetric stability.
To meet the needs of mainstream refractory castable production, Zr-105 is available in an undensified Silica Fume form. Compared to raw powder, which is highly prone to dust generation and difficult to transport, the undensified product retains excellent flow and dispersibility while offering convenient transportation, ensuring ease of use in refractory castable production.
It is recommended to prepare both the original formulation and a Zr-105 control group and compare the following parameters: actual water content during construction; initial and 30-minute slump values; setting and demolding times; strength after drying and firing; high-temperature flexural strength; permanent linear change; apparent porosity and bulk density; residual strength after thermal shock; volume loss due to abrasion; and slag resistance and dynamic erosion test results.
Supply Capacity
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