Aalok Overseas India · Rajasthan · Feldspar Division

Potash Feldspar · Potassium Feldspar · Orthoclase

KAlSi₃O₈ — Best High Purity Manufacturer & Bulk Exporter, India

K₂O 10–12% · Al₂O₃ 18–20% · Fe₂O₃ <0.10% · 80M–500M Mesh
Ceramics · Electrical Porcelain · Glass · Bone China · Tiles · Paints · 50+ Countries

#PotashFeldspar#PotassiumFeldspar#OrthoclaseFeldspar#FeldsparIndia#KAlSi3O8#BestFeldsparSupplier#AalokOverseas#RajasthanMinerals#CeramicFlux#ElectricalPorcelain

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62–66%SiO₂ Silica

18–20%Al₂O₃ Alumina

10–12%K₂O Potassium

<0.10%Fe₂O₃ Iron

1150°CFusion Point

6.0–6.5Mohs Hardness

50+Countries

48hrSample Dispatch

What Is Potash Feldspar?

India's Best High-Purity Potash Feldspar (Orthoclase/Microcline) — The Premium Ceramic & Electrical Porcelain Flux

Potash Feldspar (chemical name: Orthoclase or Microcline, formula KAlSi₃O₈) — also called Potassium Feldspar or K-Feldspar — is the potassium-dominant end member of the alkali feldspar series. Defined by its high K₂O content of 10–12%, it is one of the most critically important industrial minerals in global ceramics, electrical porcelain, glass, bone china, sanitaryware, paints, and specialty industries. With a fusion point of 1150–1170°C — higher than Sodium Feldspar — it produces a more viscous, controlled glassy phase during ceramic firing, making it the preferred flux wherever shape retention, high mechanical strength, and dielectric performance are non-negotiable.

Aalok Overseas India operates its own mining leases in Rajasthan's Aravalli and Marwar mineral belts — India's premier potash feldspar-producing zones — supplying XRF-verified Potash Feldspar powder, chips, and lumps to ceramic manufacturers, electrical porcelain plants, glass companies, bone china producers, paint formulators, and specialty industrial buyers across 50+ countries worldwide.

📊 GLOBAL MARKET FACT — POTASH FELDSPAR

The global feldspar market is valued at over USD 800 million, growing at ~5–6% CAGR. Potash Feldspar commands a premium price over Soda Feldspar in specialty segments — electrical porcelain, bone china, and high-end ceramic tile glazes. India is the world's largest feldspar exporter (30–35% of global trade). Rajasthan alone produces 2.5+ million MT/year. India's electrical porcelain and ceramic insulator industry — one of the world's largest — consumes an estimated 800,000+ MT of Potash Feldspar annually.

Technical Data

Chemical Specifications — All Grades (XRF-Verified Every Batch)

Parameter	Standard Grade	Premium Grade	High-K Grade	Ultra-White Grade
SiO₂	63–66%	64–67%	62–65%	64–66%
Al₂O₃	17–19%	18–20%	18–21%	18–20%
K₂O	8–10%	10–11%	11–12%	10–11%
Na₂O	1.0–2.5%	0.5–1.5%	<1.0%	0.5–1.2%
Fe₂O₃	<0.25%	<0.15%	<0.12%	<0.10%
TiO₂	<0.10%	<0.08%	<0.06%	<0.05%
Whiteness (Hunter)	72–80%	80–86%	82–88%	86–92%
LOI	<1.2%	<1.0%	<0.8%	<0.7%
Physical Properties	Melting Point: 1150–1170°C | Mohs: 6.0–6.5 | Sp. Gravity: 2.55–2.63 g/cm³ | Crystal: Monoclinic / Triclinic

Mesh Size & Application Guide — Full Range

Mesh	Micron	Application	Packing
30–60 Mesh	250–600µm	Glass batch direct feed, refractory, abrasives	50 kg / Bulk / FIBC
80–100 Mesh	150–180µm	Electrical porcelain, ceramic floor tile body, stoneware	50 kg PP Bags
200 Mesh	74µm	Bone china, fine porcelain, sanitaryware, wall tiles	50 kg Laminated
325 Mesh	44µm	Ceramic glazes, engobes, crystal glass, optical glass	25/50 kg HDPE
500 Mesh	25µm	Premium paints, rubber, plastic compounds, coatings	25 kg Paper Bags
Lumps / Chips	5–75mm	Glass plant batch feed, ceramic dry mill feed	Bulk / Jumbo FIBC

💡 WHY K₂O% MATTERS — THE HIGH-K ADVANTAGE

Higher K₂O (11–12%) means more fluxing power per kg — lower loading required in the ceramic body, better fired density, and improved dielectric properties for electrical porcelain. Our High-K Grade (K₂O 11–12%) is specifically processed from the highest-quality Rajasthan orthoclase veins and is the preferred grade for electrical insulator manufacturers, bone china producers, and premium vitrified tile glaze lines. Ask our technical team to confirm the right K₂O target for your firing schedule.

Key Comparison

Potash Feldspar vs. Sodium Feldspar — What Every Buyer Must Know

Property	Potash Feldspar (K-Spar)	Soda Feldspar (Na-Spar)
Chemical Formula	KAlSi₃O₈	NaAlSi₃O₈
Dominant Alkali	K₂O — 10–12%	Na₂O — 9–11%
Fusion / Melting Point	1150–1170°C (Higher)	1100–1120°C (Lower)
Glass Phase Behaviour	More viscous — controlled, slow-flow	More fluid — faster densification
Best Ceramic Applications	Electrical porcelain, bone china, HT insulators, spark plugs	Floor/wall tiles, sanitaryware, glass, glazes
Shape Retention in Kiln	✅ Superior — less warpage	Moderate
Dielectric Properties	✅ Excellent — preferred for insulators	Moderate
Translucency	✅ Higher — preferred for bone china	Moderate
Typical Market Price	Slight premium in specialty grades	Competitive for high-volume tiles & glass

Industries & Applications

Industries That Use Potash Feldspar — Multilingual Global Reference

⚡ Electrical Porcelain & Insulators

HI: विद्युत पोर्सिलेन उद्योग · AR: خزف كهربائي
ZH: 电瓷行业 · DE: Elektrische Porzellanindustrie
TR: Elektrik Porselen Sektörü · JA: 電気磁器産業
KO: 전기 자기 산업 · FR: Porcelaine électrique

The single most important application for Potash Feldspar. High-tension insulators, disc insulators, pin insulators, post insulators, spark plugs, switch gear ceramics. K₂O drives the high-viscosity glass phase that prevents deformation and ensures dielectric strength.

🍽️ Bone China & Fine Porcelain

HI: बोन चाइना उद्योग · AR: خزف العظام الرقيق
ZH: 骨瓷行业 · DE: Knochenporzellan
TR: Kemik Çini Sektörü · FR: Porcelaine Tendre
ES: Porcelana de Hueso · IT: Porcellana Bone China

Bone china and fine porcelain tableware, hotelware, giftware. Potash Feldspar's viscous glass phase enhances fired translucency, the defining visual quality of premium bone china, without causing deformation during firing at 1200–1280°C.

🏺 Ceramic Tiles & Sanitaryware

HI: सिरेमिक उद्योग · AR: صناعة السيراميك
ZH: 陶瓷行业 · TR: Seramik Sektörü
DE: Keramikindustrie · FR: Industrie céramique
ID: Industri keramik · VN: Công nghiệp gốm

Floor tiles, wall tiles, vitrified tiles, sanitaryware (WCs, basins, bathtubs). Often blended with Sodium Feldspar in body formulations. Potash Feldspar is specifically preferred in premium vitrified tile bodies requiring low warpage and high flatness.

🪟 Glass Industry

HI: कांच उद्योग · AR: صناعة الزجاج
ZH: 玻璃行业 · DE: Glasindustrie
TR: Cam Sektörü · RU: Стекольная промышленность
JA: ガラス産業 · ES: Industria del Vidrio

K₂O improves chemical durability and hardness of glass over Na₂O. Used in crystal glass (superior sparkle), optical glass, specialty laboratory glass, and TV/display panel glass. K-spar also acts as a simultaneous Al₂O₃ source in glass batch calculation.

🔬 Ceramic Glazes & Frits

HI: इनेमल उद्योग · AR: صناعة الفريت
ZH: 釉料行业 · DE: Email-Industrie
TR: Emaye Sektörü · IT: Smalti e Fritte
KO: 프릿 산업 · FR: Émaux et Frittes

High-K glaze surfaces on vitrified tile, porcelain tableware, and sanitaryware. K₂O in glaze produces a harder surface, higher gloss, and better scratch resistance compared to Na₂O-dominant glazes. Our 325–500 mesh grades are used directly in glaze ball mill loading.

🎨 Paint, Rubber & Plastics

HI: पेंट और रबर उद्योग · AR: الدهانات والمطاط
ZH: 涂料橡塑行业 · TR: Boya ve Kauçuk
DE: Farben und Kautschuk · ID: Cat dan Karet
ES: Pintura y Caucho · VN: Sơn và cao su

Fine-ground 325–500 mesh Potash Feldspar as functional filler in architectural paints and industrial coatings, rubber compounds (NR, SBR, EPDM), PVC formulations, and plastic masterbatch. Mohs 6–6.5 hardness improves film scrub resistance. Chemically inert in binder systems.

⚡ ELECTRICAL PORCELAIN — WHY POTASH FELDSPAR IS NON-SUBSTITUTABLE

India's electrical porcelain insulator industry produces over 1.2 million MT of insulators annually — the world's largest — serving domestic power transmission and export markets. Each tonne of finished insulator contains 25–35% Potash Feldspar. The critical requirement: K₂O must be 10–12% minimum with Fe₂O₃ <0.15% to achieve the dielectric strength and fired density required by IEC/IS standards. No other mineral can substitute for K-spar in electrical porcelain body — making this a captive, inelastic demand segment driving year-round consistent off-take.

Global Terminology

Potash Feldspar in 12 Languages — For Global Buyers

🇮🇳

HINDI

पोटाश फेल्डस्पार

पोटेशियम फेल्डस्पार | ऑर्थोक्लेज़

🇨🇳

MANDARIN

钾长石

正长石 | 高钾长石粉 | 钾铝硅酸盐

🇸🇦

ARABIC

فلسبار البوتاسيوم

فلسبار البوتاس | أرثوكلاز

🇹🇷

TURKISH

Potasyum Feldspat

Potas Feldspat | Ortoklas

🇩🇪

GERMAN

Kalifeldspat

Kaliumfeldspat | Orthoklas

🇫🇷

FRENCH

Feldspath Potassique

Orthose | Feldspat de Potasse

🇮🇩

BAHASA

Feldspar Kalium

Potas Feldspar | Ortoklas

🇻🇳

VIETNAMESE

Tràng Thạch Kali

Feldspar Kali | Orthoclase

🇪🇸

SPANISH

Feldespato Potásico

Ortosa | Feldespato de Potasio

🇧🇩

BENGALI

পটাশ ফেল্ডস্পার

পটাসিয়াম ফেল্ডস্পার | অর্থোক্লেজ

🇯🇵

JAPANESE

カリ長石

正長石 | カリウム長石

🇰🇷

KOREAN

칼리장석

칼륨장석 | 정장석 | K-스파

Key Production Areas — India

India's Major Potash Feldspar Mining Regions

State / Region	Key Districts	Specialty
🏔️ Rajasthan ★ Primary	Ajmer, Bhilwara, Pali, Nagaur, Sikar, Jalore	Best K₂O consistency, whiteness, low Fe₂O₃. Primary source for all premium grades.
🌿 Karnataka	Hassan, Mandya, Tumkur, Bellary	Granitic pegmatite K-spar. Good K₂O. South India ceramic supply.
🌴 Andhra Pradesh	Nellore, Ongole, Gudur, Prakasam	High-alumina K-Na mixed feldspar. Electrical porcelain and technical ceramics.
🌺 Tamil Nadu	Salem, Namakkal, Coimbatore	Consistent K-spar for ceramic and sanitaryware industries in South India.
⛏️ Jharkhand	Hazaribagh, Koderma, Giridih	Mica-belt associated K-spar. Industrial grade for standard ceramic and glass applications.

🌍 EXPORT MARKETS & KEY INDIA CONSUMING HUBS

Export destinations: Turkey · Bangladesh · Indonesia · Vietnam · UAE · Saudi Arabia · Egypt · Malaysia · Philippines · Sri Lanka · Nigeria · Brazil · Mexico · Germany · Italy · Spain · Poland + 33 more countries.
India consuming hubs: Morbi Gujarat (tiles) · Khurja UP (pottery) · Mehrauli Delhi (electrical porcelain) · Surendranagar Gujarat (insulators) · Jabalpur MP (insulators) · Chennai TN (sanitaryware) · Coimbatore TN (industrial ceramics) · Hyderabad (technical ceramics).

FAQ

Frequently Asked Questions — Potash Feldspar

Q: What is Potash Feldspar (Orthoclase) and why is it important in ceramics?

Potash Feldspar (KAlSi₃O₈, Orthoclase/Microcline) is the potassium-dominant alkali feldspar used as a flux in ceramic manufacturing. Its K₂O (10–12%) lowers the melting point to 1150–1170°C, forming a viscous glassy phase that binds ceramic particles, densifies the body, and improves dielectric strength. The higher viscosity compared to Sodium Feldspar means less warpage and shape deformation during firing — critical for tall electrical porcelain insulators and fine bone china. Loading is typically 20–35% of total body weight.

Q: Why is Potash Feldspar preferred over Sodium Feldspar for electrical porcelain?

Electrical porcelain insulators must maintain precise dimensional tolerances during firing at 1200–1280°C. Sodium Feldspar's lower melting point and more fluid glass phase causes excessive deformation in tall, complex insulator shapes. Potash Feldspar's more viscous glass phase (due to the larger K⁺ ion vs Na⁺) prevents slumping and ensures shape retention. Additionally, K₂O-based glass phases provide superior dielectric strength — the critical electrical property of high-tension insulators measured in kV/mm. IS/IEC standards for electrical porcelain effectively specify K-spar body compositions as the industry norm.

Q: Can I blend Potash Feldspar and Sodium Feldspar in my ceramic body?

Yes — and most ceramic body formulations do exactly this. Blending allows you to tune the vitrification profile: more Na-spar lowers firing temperature and speeds densification; more K-spar raises the viscosity of the glass phase, improves strength, and reduces warpage. A typical vitrified floor tile body might use 60–70% Na-spar + 30–40% K-spar in the feldspar portion. A bone china body might use predominantly K-spar. Our technical team can assist with blend ratio recommendations based on your kiln temperature, product dimensions, and whiteness target. We supply both types with consistent, XRF-matched chemistry for stable blending.

Q: What mesh size should I use for bone china / fine porcelain?

200 mesh (74µm) — standard starting grade for bone china and fine porcelain body; wet ball-milled further to <45µm in your slip preparation system. 325 mesh (44µm) — reduces ball milling time and energy; recommended for plants seeking production efficiency improvements. 500 mesh (25µm) — for ultra-fine body slip or glaze applications where pre-milled material reduces processing time significantly. For glazes on bone china, 325 mesh is the standard incoming grade before wet ball milling to final D97 <20µm.

Q: What is MOQ, lead time, and your sample policy?

Export MOQ: One 20-foot FCL (~20–22 MT) for Standard and Premium grades. Trial orders supported for new buyers. Samples (500g–2kg with full XRF CoA) dispatched via DHL/FedEx within 48 hours worldwide — free to qualified industrial buyers. Lead time: 7–14 working days (Standard/Premium); 15–21 days (High-K / Ultra-White specialty grades). Complete export documentation: XRF CoA, MSDS, commercial invoice, packing list, certificate of origin, phytosanitary certificate. Ports: Mundra · JNPT Nhava Sheva · Chennai · Vizag.

Q: Potash Feldspar — Multilingual FAQ (Hindi · Turkish · Arabic · Indonesian)

🇮🇳 Hindi: पोटाश फेल्डस्पार (KAlSi₃O₈) का उपयोग — विद्युत पोर्सिलेन इंसुलेटर (प्राथमिक उपयोग), बोन चाइना, सिरेमिक टाइल body (flux), काँच उद्योग (K₂O + Al₂O₃ source), पेंट और रबर (inert filler)। K₂O 10–12%, Fe₂O₃ <0.10%। Sample: exports@aalokoverseas.com | WhatsApp: +91-9004229525

🇹🇷 Türkçe: Potasyum Feldspat (Potas Feldspat) — elektrik porselen izolatörleri, kemik çini, seramik karo gövdesi ve cam sanayisinde kullanılır. K₂O %10–12 olan yüksek saflıkta Rajasthan kökenli Potasyum Feldspat tedarik ediyoruz. Numune için: exports@aalokoverseas.com

🇸🇦 العربية: فلسبار البوتاسيوم (Potash Feldspar / الأرثوكلاز) يُستخدم في صناعة العوازل الخزفية الكهربائية، الخزف الرقيق (بون تشاينا)، البلاط الخزفي، والزجاج. K₂O 10–12%، Fe₂O₃ <0.10%. للاستفسار: exports@aalokoverseas.com

🇮🇩 Bahasa: Feldspar Kalium (Potas Feldspar) digunakan dalam produksi porselen listrik, bone china, badan keramik, dan kaca. K₂O 10–12%, Fe₂O₃ <0.10%. Tersedia 80 mesh hingga 500 mesh. Hubungi: exports@aalokoverseas.com | WhatsApp: +91-9004229525

Industry Keywords & Hashtags

#PotashFeldspar#PotassiumFeldspar#OrthoclaseFeldspar#KAlSi3O8#FeldsparIndia#HighPurityKSpar#BestPotashFeldspar#AalokOverseas#RajasthanFeldspar#ElectricalPorcelain#BoneChina#CeramicInsulator#钾长石