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Posted by Admin on April, 13, 2026
The Best High Purity Potassium Feldspar
for Ceramics, Porcelain & Whiteware
That cup of coffee you hold every morning reached your hand through 1200°C of precision ceramic science — and it started with the right Feldspar.
Why Potassium Feldspar is the #1 Raw Material in Premium Ceramics & Porcelain
Every premium porcelain piece — from a delicate Fine Bone China teacup to a heavy-duty hotel dinner plate — relies on a precise mineral recipe. At the heart of that recipe is Potassium Feldspar (KAlSi₃O₈), the primary flux mineral that transforms a raw ceramic body into a dense, vitrified, chip-resistant, and brilliantly white finished product.
When fired above 1150°C, Potassium Feldspar melts into a viscous glass phase that fills the pores between clay and quartz particles, creating the characteristic density, translucency, and mechanical strength of high-quality porcelain. Without the right Potash Feldspar — with precisely controlled K₂O content, low iron, and optimised particle size — achieving a consistent white, vitrified body becomes impossible.
"The whiteness of your porcelain is determined not at the kiln — it is determined at the raw material selection stage. Low Fe₂O₃ Potassium Feldspar from Aalok Overseas India is the single most impactful decision a whiteware manufacturer can make for body brightness."
High Purity Potassium Feldspar — Complete Specification for Ceramics & Porcelain
Aalok Overseas supplies best-grade Potassium Feldspar sourced from the Aravalli mineral belt of Rajasthan — India's richest and most consistent Feldspar-producing geological zone. Our beneficiation processes are optimised specifically for ceramic-grade applications demanding the lowest possible Fe₂O₃ and TiO₂ with maximum K₂O flux content.
🔬 Chemical Composition — Ceramics Grade
| Oxide Parameter | Standard Grade | Premium Grade | Importance in Ceramics |
|---|---|---|---|
| SiO₂ | 63 – 65% | 65 – 67% | Glass network former; body strength |
| Al₂O₃ | 16 – 17% | 17 – 18% | Glaze hardness; chip resistance |
| K₂O ★ | 10 – 11% | 11 – 12% | Primary flux; vitrification driver |
| Na₂O | 2 – 3% | 2 – 3% | Secondary flux; assists K₂O |
| Fe₂O₃ ★★ | ≤ 0.20% | ≤ 0.12% | Controls body/glaze whiteness (lower = whiter) |
| TiO₂ ★★ | ≤ 0.05% | ≤ 0.03% | Controls translucency & colour (critical for bone china) |
| CaO | ≤ 0.6% | ≤ 0.4% | Minor impurity — controlled |
| MgO | ≤ 0.1% | ≤ 0.08% | Minor impurity |
| Loss on Ignition | ≤ 0.50% | ≤ 0.35% | Moisture/organics — lower = cleaner body |
| Whiteness L* (Hunter) | 87 – 90 | 90 – 94 | Direct body/glaze brightness indicator |
📐 Physical Properties & Available Grades
| Grade / Form | Specification | Best Application |
|---|---|---|
| Feldspar Lumps | 20 – 100 mm | In-house grinding by ceramic plants |
| Coarse Powder | 80 – 100 Mesh | Floor tiles, wall tiles, stoneware |
| Standard Powder | 200 Mesh (74 µm) | Porcelain tableware, sanitaryware |
| Fine Powder | 300 Mesh (48 µm) | Bone china, fine porcelain, glazes |
| Ultra-Fine Powder | 400 Mesh (37 µm) | Dental porcelain, technical ceramics |
| Mohs Hardness | 6 – 6.5 | — |
| Specific Gravity | 2.55 – 2.63 g/cm³ | — |
| Moisture (shipped) | ≤ 1% | — |
| Bulk Density | 1.0 – 1.3 g/cm³ (powder) | — |
★ K₂O content up to 12% makes Aalok Overseas Potash Feldspar one of the best-performing fluxes available from Indian mines — reducing energy consumption per firing cycle and lowering reject rates in premium whiteware production.
★★ Fe₂O₃ ≤ 0.12% and TiO₂ ≤ 0.03% are the gold standard for bone china, fine porcelain, and sanitary ware whiteness. Our beneficiation and magnetic separation processes specifically target these chromophore oxides.
High Purity Feldspar for Every Segment of the Ceramics & Whiteware Industry
🧪 Role of Quartz Powder & Sodium Feldspar in Ceramic Bodies
The complete ceramic body formula relies on three mineral workhorses working in concert. Aalok Overseas supplies all three:
| Mineral | Function in Ceramic Body | Typical Loading | Aalok Grade |
|---|---|---|---|
| Potassium Feldspar | Primary flux — vitrification, glaze hardness, body density | 20 – 35% | View Spec |
| Sodium Feldspar (Albite) | Secondary flux — lower firing temp, faster sintering | 5 – 20% | View Spec |
| Quartz / Silica Powder | Skeletal filler — controls shrinkage, improves thermal stability | 20 – 30% | View Spec |
Why Ceramic Manufacturers Choose Aalok Overseas for Best Quality Feldspar
Global Ceramic & Whiteware Production Hubs — Key Markets for High Purity Feldspar
The global ceramics industry is projected to exceed USD 380 billion by 2027, driven by construction booms in Asia, Middle East, and South America. Aalok Overseas actively supplies Potassium Feldspar, Sodium Feldspar, and Quartz to manufacturers in these key clusters:
🏭 Industries Using High Purity Potassium Feldspar & Sodium Feldspar
Potassium Feldspar for Ceramics — Multilingual Industry Keywords
Our customers search for high purity Feldspar in their own languages. Aalok Overseas is found worldwide under these terms:
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