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Two distinct natural product lines for ceramic bodies and technical formulation work
Yinovia Minerals’ current feldspar portfolio consists of two clearly differentiated product lines: natural sodium-dominant Na-K feldspars (Na-K Series) and natural, non-flotated feldspathic mix raw materials (YF-M Series). These materials should not be presented as one uniform product because their chemistry, mineralogy, firing behaviour, colour and processing characteristics differ.
Na-K Series – sodium-dominant Na-K feldspar
The Na-K Series covers two natural sodium-dominant Na-K feldspar grades for use as feldspathic fluxes in ceramic formulations. Na-K1 is positioned as the primary low-Fe grade, while Na-K2 offers comparable total alkali content with higher Fe₂O₃ and may be considered as a more economical second grade.
| Grade | Na₂O+K₂O | Na₂O/K₂O ratio | Fe₂O₃ | Practical positioning |
|---|---|---|---|---|
| Na-K1 | 11.01% | ≈ 2.35 | 0.22% | Primary low-Fe grade |
| Na-K2 | 10.91% | ≈ 2.12 | 0.50% | More economical where higher Fe is acceptable |
- Main use: wall and floor tile bodies, general ceramic bodies and substitution trials against the customer’s current feldspar.
- Particle sizes: 0–2 cm / 2–5 cm / 5–15 cm, or as agreed for the order.
- Supply: bulk, Big Bags or milled grade, subject to commercial confirmation.
- Fired colour, water absorption, shrinkage, strength, warpage, rheology and thermal behaviour should be confirmed in the customer’s body.
YF-M Series – natural feldspathic mix raw materials
The YF-M Series comprises three natural, non-flotated feldspathic raw materials: YF-M1, YF-M2 and YF-M3. The series is not positioned as a premium white sodium feldspar line. It is intended for ceramic body development and technical formulation work where feldspathic minerals, quartz and naturally occurring clay components contribute together.
| Type | SiO₂ % | Al₂O₃ % | Fe₂O₃ % | Na₂O+K₂O % | Main strength | Main limitation |
|---|---|---|---|---|---|---|
| YF-M1 | 76.12 | 13.84 | 0.30 | 7.83 | Best overall balance; good slip values | Medium fired brightness |
| YF-M2 | 76.38 | 13.26 | 0.71 | 7.02 | Strongest sintering | Colour-critical / low L* |
| YF-M3 | 76.85 | 12.93 | 0.58 | 7.14 | Potential strength contribution | Critical slip behaviour |
- YF-M1: first practical candidate for general mix-body trials.
- YF-M2: strong sintering component for colour-insensitive or low-dosage formulations.
- YF-M3: selected recipes where strength contribution may justify more difficult slip behaviour.
- Available particle size: 0–10 mm, subject to source and lot confirmation.
- Packaging: bulk cargo or Big Bags, subject to order and logistics setup.
Technical evaluation
Feldspar and feldspathic mix raw materials should not be selected on chemistry alone. Mineralogy, milling fineness, solids content, additives, rheology, firing curve, colour, water absorption, shrinkage, strength and warpage should be evaluated together. New grades should be validated through controlled substitution trials against the customer’s current feldspar.
Website note: values are indicative sample data and must not be presented as guaranteed specifications.
