95 High-temperature alumina micropowder is the mainstream category of industrial-grade high-temperature alumina. Its core advantages are high cost-effectiveness (taking into account both performance and cost), α phase conversion rate ≥98%, high temperature resistance (1500-1700°C), wear resistance and corrosion resistance. 

The particle size is usually concentrated at 5-50μm, which is suitable for mid- to low-end high-temperature scenarios and cost-sensitive industrial production. Its uses cover refractory materials, ceramics, abrasives, chemicals and other fields. The following is a detailed analysis according to application priority and practical operation scenarios: 

1. Core uses: high temperature kilns and refractory materials (the largest amount, accounting for ≥60%) 95 High-temperature alumina micropowder is the core raw material of refractory materials due to its high temperature resistance, low shrinkage, and anti-erosion properties. It is especially suitable for medium-temperature (1500-1700°C) kiln scenarios, and its cost performance is far superior to high-purity (99%+) products.  1. Refractory castable/plastic (mainstream industrial application) Function: used as aggregate or fine powder filler, mixed with binders (such as alumina cement, sodium silicate) and admixtures to make unshaped refractory materials, used for on-site pouring or coating of kiln linings.  Typical scenarios: Ceramic kiln: kiln side wall, around the burner, kiln car table (resistant to 1600°C high temperature and glaze corrosion, replacing traditional clay bricks, extending service life 2-3 times); Building materials kiln: cement rotary kiln, transition zone lining of glass kiln (resistant to cement clinker/glass melt erosion); Metallurgical kiln: non-ferrous metal smelting furnace (such as aluminum electrolytic tank), ladle lining (resistant to metal melt erosion); Industrial boilers: high-temperature section linings of power station boilers and waste incinerators (resistant to high-temperature flue gas corrosion).  Key points for selection: Give priority to powders with D50=10-20μm and BET=8-12m²/g, which must meet "sintering shrinkage ≤3%" to avoid cracking after pouring.  2. Refractory bricks/refractory plates Function: Mixed with clay, silica and other raw materials, shaped and sintered at high temperature to make shaped refractory products, used for kiln structural parts or insulation layers.  Typical scenarios: Ordinary industrial kilns: tunnel kilns, kiln walls and roof bricks of down-flame kilns (the cost is only 60%-70% of 99% alumina refractory bricks); Insulating refractory materials: insulation layer of high-temperature kilns (mixed with lightweight aggregates such as drift beads to make lightweight refractory bricks with a thermal conductivity of ≤0.8W/(m・K)); Refractory gasket/storer plate: Sufferer plate for ceramic sintering (resistant 1500℃, can be reused more than 500 times).  3. Wear-resistant and fire-resistant coating Function: Made into spray powder, through flame spraying or plasma spraying, a wear-resistant and high-temperature resistant coating is formed on the surface of the equipment.  Typical scenarios: Kiln feed inlet, inner wall of pipeline (reduces erosion and wear of powder/material, extends equipment life); Mechanical parts: fan impeller, valve spool under high temperature conditions (1200°C high temperature resistance + wear resistance).  2. The second largest use: ordinary ceramics and architectural ceramics (consumption ratio ≥ 20%) 95 High-temperature alumina powder is used as a reinforcing filler or glaze additive for ceramic bodies, which can improve the hardness, wear resistance and high temperature resistance of ceramics, and is suitable for mid- to low-end ceramic products (no ultra-high purity is required).  1. Ceramic body (structural enhancement) Function: replace part of kaolin and feldspar, and add to the ceramic body to improve sintering density and mechanical strength.  Typical scenarios: Architectural ceramics: ceramic tiles, floor tiles (increased surface hardness, Mohs hardness ≥ 6, scratch resistance); Daily ceramics: heat-resistant ceramic bowls and pots (temperature resistance ≥ 800°C, can be directly heated by an open flame); Industrial ceramics: ordinary ceramic valves, pipes (used in normal/medium temperature conditions, cost 30% lower than 99% alumina ceramics).  Selection points: Choose powder with D50=5-10μm and uniform particle size distribution (span ≤1.5) to avoid affecting the fluidity of the green body.  2. Ceramic glaze (performance optimization) Function: As the "hard component" of the glaze, it adjusts the fluidity and gloss of the glaze and improves the wear resistance and corrosion resistance of the glaze.  Typical scenarios: Architectural tile glaze: matte tiles, anti-slip tiles (increases glaze hardness, reduces water absorption to ≤0.5%); Industrial ceramic glazes: ceramic insulators, chemical ceramic equipment (improves glaze resistance to acid and alkali corrosion).  3. Other important uses: abrasives, chemicals and electronic auxiliary materials 1. Ordinary abrasives and abrasive materials 95 high-temperature alumina micropowder has high hardness (Mohs hardness 9). It is the core raw material of low-cost abrasives and is suitable for ordinary grinding scenarios (no ultra-high purity is required).

     Typical scenarios: Sandblasting abrasives: rust and oil removal on metal surfaces (replacing quartz sand, grinding efficiency increased by 1.5 times); Abrasive paste/polishing powder: rough grinding of ordinary metal parts and glass (such as edge grinding of automobile glass); Abrasive materials: resin grinding wheels, ceramic abrasives (mixed and sintered with binders, used for metal cutting or polishing).  Key points for selection: Choose powder with D50=3-8μm, irregular particle shape, and hardness ≥1600HV.  2. Chemical industry (catalyst carrier and anti-corrosion materials) Catalyst carrier: Utilizing high specific surface area (BET=10-15m²/g) and chemical stability, it can be used as a catalyst carrier (such as desulfurization catalyst, denitrification catalyst) in the petrochemical industry and environmental protection field, replacing some activated carbon or molecular sieves, and the cost is lower.  Anti-corrosion materials: made into ceramic coatings, used for the inner walls of chemical equipment (such as reactors, pipelines), resistant to acid and alkali corrosion (except hydrofluoric acid), and suitable for normal temperature - 800°C working conditions.  3. Electronic and electrical auxiliary materials Insulating filler: Insulating materials (such as insulating ceramic bases and insulators) used in medium and low-voltage electrical appliances. Taking advantage of its insulation properties (room temperature resistivity >10¹¹Ω·cm), the cost is only 50% of that of high-purity alumina, adapting to ordinary electrical scenarios.  Electronic packaging auxiliary materials: used as fillers for epoxy resin to improve the thermal conductivity and mechanical strength of packaging materials (such as filling LED lamp casings).  4. Other scenarios 3D printing ceramic consumables: For low-end ceramic 3D printing (such as architectural models, handicrafts), choose powder with D50=20-40μm and good fluidity (angle of repose ≤35°) to reduce printing costs; Friction materials: fillers for automobile brake pads and clutch plates (to improve wear resistance and high temperature resistance, temperature resistance ≥600°C); Feed additives: high purity 95 Alumina micropowder (food grade) can be used as a magnesium and aluminum supplement for animal feed (heavy metal impurities need to be controlled to ≤0.01%).

4. Precautions for use (avoiding pitfalls in industrial operations) Avoid high-temperature out-of-class use: 95 High-temperature alumina powder has a long-term use temperature of ≤1700°C. If used in scenes >1800°C, it is prone to softening and deformation, and needs to be upgraded to a purity of more than 99%; Control the impact of impurities: If used in ceramic glazes or electronic scenes, supplier control is required Fe₂O₃≤0.5% (to avoid discoloration of the product), SiO₂≤2% (to avoid reducing high temperature resistance); Adaptable molding process: use coarse powder (D50=10-20μm) for castables and fine powder (D50=5-10μm) for ceramic bodies to avoid molding defects caused by improper particle size; Moisture-proof storage: The powder easily absorbs moisture and agglomerates, so it needs to be stored in a sealed and dry environment (humidity ≤ 60%). It can be dried at 120°C for 2 hours before use.  

Summary 95 The core value of high-temperature alumina micropowder is "cost-effective, medium-temperature and high-performance", which focuses on serving batch industrial scenarios such as high-temperature kiln refractory materials, ordinary ceramics, abrasives, etc. It is the preferred raw material for "balance between performance and cost" in industrial production. The essence of its purpose is to use α-Al₂O₃’s high temperature resistance, wear resistance, and chemical stability properties to replace high-cost materials in scenarios that do not require ultra-high purity, reducing production costs while meeting basic performance requirements.