Flameware - Very High Pyrax with Molochite
|
Code # L3660C |
Location BOX54 |
Batch # -2 |
| Materials | Amt |
|---|---|
| Bentonite | 5.000 |
| Pyrax 8F (Pyrax Pyrophyllite) | 60.000 |
| Pioneer Kaolin | 20.000 |
| Molochite 50/80 (Molochite) | 15.000 |
Total:100.00
Notes
The objectives are:
-Produce the lowest possible thermal expansion in a sintered (not vitrified) body. That means the highest possible percentage low expansion Pyrax with some low expansion grog (to terminate any microcracks that might appear as a result of sudden heating/cooling). Pyrax hosts plasticity well, this will minimize the percentage of clay needed to make the body workable.
-Use an absolute minimum of quartz-containing clay materials, that means no ball clay or fireclay (only kaolin and bentonite).
-Fire as high as possible (to get fired strength) but not so high that any vitrification process starts and alters the mineral structure of the pyrax thereby compromising its low expansion. Flame-shock tests on tiles fired at a range of temperatures should demonstrate this.
Make shrinkage/porosity/water content test specimens as well as tiles and a wheel thrown piece.
On the wheel plasticity is low, it is barely throwable without splitting at the lip, 1% more bentonite is needed. It does roll well for making tiles, but is somewhat sticky. Dry strength is better than expected.
At cone 6, this is very porous, this is going to need a much high temperature to develop any sort of maturity.
Pictures
Pyrax flame ware body test
Tiles will be used for flame shock testing. The bars are for drying shrinkage and fire shrinkage and porosity at 5 temperatures. The small sample is for water content and LOI measurements. The small throw piece was done to evaluate the plasticity.
Flameware L3660C crazing
Bisque fired at cone 8, then glaze fired at cone 6 using M370 clear (G2926B).
L3360C, D flameware bars - Pyrax, Molochite
URLs
A revised mix to increase plasticity
Testdata
SHAB - Shrinkage/Absorption
| DLEN | FLEN | FWT | BWT | CONE | DSHR | FSHR | ABS | |
| 5 | 94.29 | 90.42 | 35.78 | 39.42 | 10.0 | 5.7% | 4.1% | 10.2% |
| 9 | 94.14 | 90.73 | 35.69 | 39.95 | 9.0 | 5.9% | 3.6% | 11.9% |
| 8 | 94.07 | 91.16 | 35.89 | 40.48 | 8.0 | 5.9% | 3.1% | 12.8% |
| 7 | 93.94 | 91.65 | 35.42 | 40.21 | 6.8 | 6.1% | 2.4% | 13.5% |
| 6 | 94.15 | 91.83 | 36.43 | 41.58 | 6.0 | 5.8% | 2.5% | 14.1% |
LDW - LOI/Density/Water Content
| WWGT | DWGT | FWGT | H2O | LOI | DENS | |
| 1 | 21.88 | 16.88 | 16.15 | 22.9% | 4.3% |
TSFL - Thermal Shock Failure
| CONE | SECS | MODE | MM | |
| 1 | 7 | 25 | Ping | 4.6 |
| 2 | 5 | 7 | Ping | 4.8 |
XML (to paste into Insight)
<?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="Flameware - Very High Pyrax with Molochite" id="73945" key="CYqj3s9X" date="2016-10-25" codenum="L3660C" location="BOX54" picturebasename=""> <recipelines> <recipeline material="Bentonite" amount="5.000" tolerance=""/> <recipeline material="Pyrax 8F" lookup="Pyrax Pyrophyllite" amount="60.000" tolerance=""/> <recipeline material="Pioneer Kaolin" amount="20.000" tolerance=""/> <recipeline material="Molochite 50/80" lookup="Molochite" amount="15.000" tolerance=""/> </recipelines> </recipe> </recipes>
Born: 2012-11-28, Modified: 2016-10-25 16:43:48
Pyrax/Molochite/EPK Flameware
|
Code # L3660D |
Location BOX54 |
| Materials | Amt |
|---|---|
| Bentonite | 5.000 |
| EP Kaolin | 25.000 |
| Pyrax 8F (Pyrax Pyrophyllite) | 60.000 |
| Molochite 50/80 (Molochite) | 10.000 |
Total:100.00
Notes
The last mix is not plastic enough to prevent splitting at the rim while throwing. This reduces the grog and increases the kaolin, switching it to the more plastic EPK also.
It is the same plasticity. Needs bentonite.
Pictures
L3360C, D flameware bars - Pyrax, Molochite
URLs
https://www.ceramcor.com/xtremacookware/
http://miriamsearthencookware.com
Testdata
SHAB - Shrinkage/Absorption
| DLEN | FLEN | FWT | BWT | CONE | DSHR | FSHR | ABS | |
| 10 | 93.99 | 92.03 | 34.17 | 38.05 | 10 | 6.0% | 2.1% | 11.4% |
| 9 | 92.19 | 34.31 | 38.58 | 9.0 | 12.4% | |||
| 8 | 93.66 | 91.94 | 35.6 | 40.11 | 7.0 | 6.3% | 1.8% | 12.7% |
| 7 | 93.74 | 92.18 | 35.53 | 40.09 | 6.0 | 6.3% | 1.7% | 12.8% |
| 12 | 94.09 | 92.64 | 32.83 | 37.04 | 5.5 | 5.9% | 1.5% | 12.8% |
| 6 | 93.94 | 6.1% |
LDW - LOI/Density/Water Content
| WWGT | DWGT | FWGT | H2O | LOI | DENS | |
| 1 | 25.31 | 19.09 | 18 | 24.6% | 5.7% |
TSFL - Thermal Shock Failure
| CONE | SECS | MODE | MM | |
| 2 | 9 | 8 | Ping | 4.1 |
| 1 | 7 | 30 | Ping | 4.4 |
| 3 | 5 | 7 | ping | 5.0 |
XML (to paste into Insight)
<?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="Pyrax/Molochite/EPK Flameware" id="73952" key="zs72Qa74" date="2015-07-13" codenum="L3660D" location="BOX54" picturebasename=""> <recipelines> <recipeline material="Bentonite" amount="5.000" tolerance=""/> <recipeline material="EP Kaolin" amount="25.000" tolerance=""/> <recipeline material="Pyrax 8F" lookup="Pyrax Pyrophyllite" amount="60.000" tolerance=""/> <recipeline material="Molochite 50/80" lookup="Molochite" amount="10.000" tolerance=""/> </recipelines> </recipe> </recipes>
Born: 2012-11-28, Modified: 2015-07-13 08:08:58
