Share from Insight-live.com (Lab Documentation and Calculation System) by Digitalfire.
These are two recipes that we have found reduce the COE of the popular G2926B.
Cone 6 Clear Glossy Base
Total:506,500.00 (R) Auto Unity Formula
Notes *The base recipe used by production at Plainsman Clays. This is our production batch, 500kg. URLs Technical informat..at digitalfire.com Mixing, adjustment..PlainsmanClays.com Pictures XML (to paste into Insight) <?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="Cone 6 Clear Glossy Base" id="180072" key="57vpY7Sw" date="2021-02-12" codenum="G2926B" picturebasename=""> <recipelines> <recipeline material="Nepheline Syenite" amount="84.000" tolerance="" unitabbr="KG"/> <recipeline material="Ferro Frit 3134" amount="117.000" tolerance="" unitabbr="KG"/> <recipeline material="EPK" amount="90.000" tolerance="" unitabbr="KG"/> <recipeline material="Vansil W-30 Wollastonite" amount="32.000" tolerance="" unitabbr="KG"/> <recipeline material="Silica" amount="173.000" tolerance="" unitabbr="KG"/> <recipeline material="Silverline 303 Talc" amount="10.500" tolerance="" unitabbr="KG"/> </recipelines> </recipe> </recipes> Born: 2014-05-15, Modified: 2021-02-12 20:11:36 |
G2926B Reduced COE (Li2O)
Total:100.00 Auto Unity Formula
Notes *This is the best of a series of tests to lower the thermal expansion of G2926B. Separate trials of substituting ZnO, SrO, Li2O for KNaO were tried (in each the brilliant surface was being marred by an orange peel like surface). This version is a hybrid, diversifying fluxes by adding Li2O and SrO. It sources SrO from Frit 524 and Li2O from Spodumene. Pictures G2926B vs J shock test ![]() There was no crazing at 320F, but at 340F 2926B has five cracks and this has one at the edge. It is interesting that 2926B has performed differently in different firings in this test. 2926J on P380 ![]() The surface is brilliant and clear. G2926B vs J Cone 6 Fluidity ![]() G2926J is flowing a little more. Fired character is very similar to B. XML (to paste into Insight) <?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="G2926B Reduced COE (Li2O)" id="76267" key="uzBcop69" date="2018-05-12" codenum="G2926J"> <recipelines> <recipeline material="Spodumene" amount="11.000"/> <recipeline material="Fusion Frit F-524" amount="15.000"/> <recipeline material="Ferro Frit 3134" amount="15.000"/> <recipeline material="EPK" amount="18.000"/> <recipeline material="Wollastonite" amount="6.000"/> <recipeline material="Silica" amount="32.000"/> <recipeline material="Silverline Talc" lookup="Talc" amount="3.000"/> </recipelines> </recipe> </recipes> Born: 2014-02-19, Modified: 2018-05-12 12:59:20 |
G2926B Reduced COE (MgO)
Total:100.00 Auto Unity Formula
Notes *This is an adjustment to G2926B to reduce its thermal expansion. However, before trying this, we recommend ball milling the G2926B (that will lower its expansion). Or, using a finer grade of silica, e.g. 325 mesh. Only if those do not work, then try this. Pictures G2926S after 300F:IceWater test on P300 ![]() No crazing after the test. The transparency and clarity of the glass is great, this looks very promising. P300 after 300F:IceWater test ![]() S is not crazing after two days. B crazing in the cold water. M370 with G2926S, G2926B inside ![]() Untitled ![]() XML (to paste into Insight) <?xml version="1.0"?> <recipes version="1.0" encoding="UTF-8"> <recipe name="G2926B Reduced COE (MgO)" id="131969" key="ajPejCpN" date="2021-02-12" codenum="G2926S"> <recipelines> <recipeline material="Nepheline Syenite" amount="20.131" tolerance=""/> <recipeline material="Ferro Frit 3134" amount="10.475" tolerance=""/> <recipeline material="Fusion Frit F-69" amount="10.311" tolerance=""/> <recipeline material="EPK" amount="12.439" tolerance=""/> <recipeline material="Wollastonite" amount="11.293" tolerance=""/> <recipeline material="Silica" amount="35.352" tolerance=""/> </recipelines> </recipe> </recipes> Born: 2014-02-19, Modified: 2021-02-12 20:17:59 |