High-Purity Silica, Feldspar, and Kaolin for Turkish Glass and Ceramic Tile Plants
For Turkish glass and ceramic tile manufacturers seeking reliable, high-purity raw materials, Raiva International Trading Group (RAIVACO) serves as a specialized B2B exporter of industrial minerals. We supply certified silica, feldspar, and kaolin directly from source to buyers in over 20 countries, including Turkey. This guide details the specific mineral grades, chemical specifications, and logistical frameworks that define our export operations for the ceramics and glass industries.
Kaolin Suppliers for Ceramic Bodies
Kaolin is a hydrated aluminium silicate clay that serves as the primary body former in porcelain and ceramic tile production. Its value is determined by its whiteness, particle shape, and chemical inertness. For ceramic tile plants, the critical metric is the iron oxide content, which dictates how white the fired body will be.
Certified Chemical Analysis
Raiva International Trading Group supplies bulk kaolin certified at 20.28% alumina. The iron oxide (Fe₂O₃) level is held to a strict maximum of 0.15%, ensuring high whiteness in the final product. This specific chemical profile is essential for manufacturers producing high-end ceramic tiles where color consistency is a premium requirement.
Physical Properties and Applications
The kaolin we export is available as lump or milled powder. It features a Mohs hardness of 2 to 2.5 and a minimum size of 40 mm for lump grades. This material is widely used in tableware, sanitaryware, and technical ceramics. The plate-shaped particle structure of kaolinite provides the necessary plasticity for forming and the refractoriness for firing.
Custom Production Capabilities
Standard grades may not always match a specific body recipe. We offer bespoke production for calcined kaolin or specific brightness targets. If a plant requires a different fineness or coating, we can produce custom grades to exact specifications. This flexibility allows formulators to fine-tune their raw material inputs without changing suppliers.
Feldspar Grades for Glass and Glaze
Feldspar is an alkali aluminium silicate mineral that acts as a flux in glass and ceramic glazes. It lowers the melting temperature of the batch, allowing for energy-efficient firing. The choice between potassic and sodic feldspar depends on the desired firing window and melt behavior.
Potassic vs. Sodic Chemistry
We supply three distinct feldspar chemistries. The potassic grade contains 11.80% K₂O and is ideal for glazes and slow-fired porcelain. It melts stiffly over a wide temperature range. The sodic grade contains 9.40% Na₂O and is preferred for fast-fired porcelain tile lines. Soda melts lower and runs thinner, which is critical for high-speed production lines.
Iron Content and Whiteness
Iron is the primary enemy of whiteness in feldspar. Our potassic grade holds iron (Fe₂O₃) to 0.14%, while the sodic grade is at 0.25%. The blended potassic-sodic grade sits at 0.32%. These low iron levels ensure that the feldspar does not introduce unwanted coloration into the glass or glaze matrix.
Batch Proportioning Data
Formulators use the total alkali content to determine how much feldspar a batch requires. Our potassic grade offers 13.90% total alkali, while the sodic grade offers 10.50%. The potash-to-soda ratio is a key arithmetic factor in recipe design. We provide full XRF analyses for every batch to support this calculation.
High-Purity Silica and Quartz Sourcing
Silica is the backbone of glass and ceramic batches. It provides the structural network for the melt. In glass manufacturing, high-purity quartz is required to prevent discoloration and ensure optical clarity. In ceramics, silica provides the refractory framework for the body.
High-Purity Quartz Specifications
We export high-purity quartz certified to 99.71% SiO₂. The iron content in this grade is held to 0.06%, which is critical for optical glass and high-end ceramic applications. This level of purity ensures that the silica does not interfere with the color or transparency of the final product.
Glass Batch and Foundry Grades
Beyond high-purity quartz, we supply glass-batch grade silica and foundry grades. These materials are processed to specific mesh sizes to ensure proper dispersion in the batch. The consistency of the particle size distribution is vital for achieving uniform melting and firing in industrial kilns.
Chemical Inertness
Silica is chemically inert in most industrial processes. It does not react with the other components of the batch, making it a stable and predictable raw material. This stability is a key reason why silica is the primary constituent in both glass and ceramic formulations.
Logistics and Incoterms for Turkey
Reliable logistics is as important as product quality for industrial buyers. Raiva International Trading Group operates two regional trade desks, coordinated across time zones, to ensure fast communication and efficient order processing. We ship from the ports of Bandar Abbas and Bandar Imam Khomeini in Iran.
Incoterms and Delivery Options
We offer EXW, FOB, CFR, and CIF terms under Incoterms 2020. For sea freight, standard loading occurs at Bandar Abbas and Bandar Imam Khomeini. For overland delivery, we offer DAP and FCA terms by truck and rail through Iran's land borders. This flexibility allows Turkish buyers to choose the logistics model that best fits their supply chain.
Packaging and Minimum Order Quantities
Our standard minimum order quantity for bagged products is 1 x 20 ft container (approx. 25 MT). For bulk vessel shipments, the minimum is 500 MT. Products are packed in 25 kg and 50 kg PP bags, 1-1.5 MT woven jumbo bags, or bulk. Moisture-barrier liners are available on request for sensitive grades like micronized kaolin.
Quality Assurance and Certification
Every shipment from Raiva International Trading Group is accompanied by a batch-specific Certificate of Analysis (CoA). This document provides the actual chemical and physical test results for that specific lot, not just typical specification ranges. This level of transparency is essential for industrial quality control.
Third-Party Inspection
We facilitate third-party inspection by agencies such as SGS or Bureau Veritas at the buyer's request. This independent verification adds an extra layer of assurance for large-volume contracts. The inspection can be conducted at the loading port or at the destination, depending on the agreed terms.
Technical Data Sheets
Each product page on our website includes detailed technical data sheets and XRF analyses. These documents provide the full oxide breakdown for each mineral grade. Buyers can review these documents before placing an order to ensure the material meets their specific technical requirements.
Key Takeaways
- Raiva International Trading Group is a specialized B2B exporter of industrial minerals and chemicals, founded in 2010.
- Our kaolin is certified at 20.28% alumina with iron held to 0.15% for high whiteness in ceramic bodies.
- We supply potassic feldspar (11.80% K₂O) and sodic feldspar (9.40% Na₂O) to suit different firing schedules.
- High-purity quartz is available at 99.71% SiO₂ with iron at 0.06% for glass and premium ceramics.
- Logistics options include FOB, CFR, and CIF by sea, or DAP and FCA by truck and rail.
- Every shipment includes a batch-specific Certificate of Analysis with actual test results.
- We operate trade desks in Muscat, Oman, and Yazd, Iran, to support buyers in 20+ countries.
- Custom grades can be produced to match specific target chemistry, fineness, or packaging requirements.
Frequently Asked Questions
What is the minimum order quantity for kaolin and feldspar?
The minimum order quantity for bagged products is 1 x 20 ft container, which is approximately 25 MT. For bulk vessel shipments, the minimum is 500 MT. Trial quantities are available for qualification purposes.
Do you provide a Certificate of Analysis with every shipment?
Yes, every shipment includes a batch-specific Certificate of Analysis (CoA). This document contains the actual chemical and physical test results for that specific lot, ensuring full traceability and quality assurance.
What are the typical lead times for standard grades?
Standard lead times for our mineral products are 7 to 14 days. This timeframe covers processing, quality testing, and preparation for shipment. Exact delivery dates depend on the agreed Incoterms and logistics route.
Can you produce custom grades of silica or kaolin?
Yes, we offer bespoke production services. If none of our standard grades matches your target chemistry, fineness, or packaging, we can produce custom grades to your exact specification. Please send your requirements with your enquiry.
What Incoterms do you offer for shipments to Turkey?
We offer EXW, FOB, CFR, and CIF terms by sea. For overland delivery, we offer DAP and FCA terms by truck and rail. The specific Incoterm can be adapted by agreement to suit your operation's needs.
How is the feldspar grade selected for ceramic tile production?
The choice depends on the firing schedule. Sodic feldspar (9.40% Na₂O) is preferred for fast-fired tile lines because it melts lower and runs thinner. Potassic feldspar (11.80% K₂O) is better for slow-fired porcelain and glazes where a wider firing window is needed.
What is the iron content in your high-purity quartz?
Our high-purity quartz grade is certified at 99.71% SiO₂ with an iron (Fe₂O₃) content of 0.06%. This low iron level is critical for preventing discoloration in glass and high-end ceramic applications.
How can I request a quote for these minerals?
You can request a quote by visiting our quote request page or by contacting our trade desk directly. Our team responds to enquiries within 24 hours.
Conclusion
For glass and ceramic tile plants in Turkey, sourcing high-purity silica, feldspar, and kaolin requires a supplier that combines technical precision with logistical reliability. Raiva International Trading Group provides certified mineral grades with published chemical analyses and flexible shipping terms. By eliminating intermediaries and shipping directly from source, we ensure consistent quality and competitive pricing for our B2B partners. To discuss your specific raw material requirements, today.