REFRACTORY METALS - COMPOSITES - SPECIAL ALLOYS - MarkeTech International

$Refractory Metals and Special Alloys - MarkeTech International$

Toll Free 877-452-4910
Tel: 360-379-6707
Fax 360-379-6907

MarketTech International, Inc.
107B Louisa St.
Port Townsend, WA 98368

Marketech's Metal Tech Group provides refractory metals, composites and special alloys for aerospace, oilfield, industrial, electronic, medical, and defense applications. We provide finished components, bar stock, sheet, tubes, wire, and rods of a wide range of compositions. For large production, we offer MIM, metal injection molding.

REPTON setter tiles, kiln furniture, and special fixtures are lightweight, ridge, and high strength ceramics that resist distortion and spauling, even when thermal cycled many times. They are available with a smooth or a unique textured surface that permits pinpoint contact with the load. Sticking can be eliminated as well as providing a surface that breathes, allowing gasses from the ware to escape.

Applications include firing ceramic capacitors, SOFCs, PZTs, hard and soft ferrites, co-fired substrates and powdered metals. REPTON is available in a wide range of compositions that include a range of alumina, mullite/alumina, zirconia, cordierite, magnesia, and aluminum titantate.

Construction: Repton tiles and shapes are gel cast to precise and consistent dimensions and then high fired to retain stability. In addition to flat setter tiles, this process can be used formed saggers, trays, crucibles, and tubes.

Sizes: Standard sizes are up to 13" x 13" - Custom shapes up to 24" x 24" and thickness from 1 to 50 mm. Note that larger sizes require thicker tiles.

Surface Finish: Smooth or textured to reduce sticking and allow for product out gassing. A zirconia coating can be applied and fired on the surface to reduce chemical interaction.

Repton Texture Surface
(also available with smooth surface)

Compositions:
Alumina,
Mullite/Alumina,
Zirconia, Cordierite,
Magnesia,
Aluminum Titantate,
Yttria, and
Special Compositions
Porosity: 0 to 70%

High Purity Alumina Repton Products
Repton Aluminum Oxide Materials
Brand	Composition	Density G/cm3	Porosity %	Bend Strength MPa	Spall Resist °C	Hot Creep Test mm Def@C°			Thermal exp ppm/C°		Features
Brand	Composition	Density G/cm3	Porosity %	Bend Strength MPa	Spall Resist °C	1400	1500	1550	@ 300	@ 900	Features
106	AlOx 99.99%	3.9	0	>400	-	-	-	-	-	-	Ultra High Purity
115	AlOx 99.6%	3.2	11	>255	500	2	5	14	6.5	8.0	High Density Purity
125	AlOx 99.6%	3.4	1	>182	500	1	1.5	2	6.5	8.0	High Purity Standard
136	AlOx 99.6%	3.9	0	>392	550	2	6	15	6.0	8.0	Molding-structural
214	AlOx 99.6%	2.6	35	>56	450	2	17	-	-	-	High porosity/ purity
202	AlOx 99.6%	1.8	55	>22	400	-	-	-	-	-
201	AlOx 99.6%	1.5	63	>7	400	-	-	-	-	-
Repton Alumina-Silica Materials
Brand	Composition	Density G/cm3	Porosity %	Bend Strength MPa	Spall Resist °C	Hot Creep Test mm Def@C°			Thermal exp ppm/C°		Features
Brand	Composition	Density G/cm3	Porosity %	Bend Strength MPa	Spall Resist °C	1400	1500	1550	@300	@900	Features
314	Mullite 93/7	2.6	28	>13	600	1	1	1	4.2	6.0	Superior hot creep
504	Mullite 90/10	2.5	32	>7	650	1	1	4	3.9	5.0	Max spall res.
601	Mullite 80/20	1.0	70	>11	350	1	4	11	3.8	5.0	Extra light weight
632	Mullite 80/20	1.5	56	>27	400	1	1	5	4.0	5.0	Light Weight setter
663	Mullite 80/20	2.4	29	>25	500	1	1	3	4.0	5.0	Zirconia
Zirconia Repton Materials
Brand	Composition	Density G/cm3	Porosity %	Bend Strength MPa	Spall Resist °C	Hot Creep Test mm Def@C°			Thermal exp ppm/C°		Features
Brand	Composition	Density G/cm3	Porosity %	Bend Strength MPa	Spall Resist °C	1400	1500	1550	@300	@900	Features
827	Zr/Yt 3 mol%	4.1	30	>96	-	-	-	-	-	-	Co-precip. high porosity
868	Zr/Yt 8 mol%	6.0	0	>160	500	-	-	-	8	10	High density
835	Zr/Yt 4 mol%	3.3	43	>22	350	1	5	11	8	8	High porosity
837	Zr/Yt 4.4 mol%	4.2	27	>18	500	1	3	6	8	8	Good spalling characteristics
838	Zr/Yt 3 mol%	6.1	0	>1050	450	-	-	-	9.7	10.3	Co-precip. high strength
848	Zr/Yt 3 mol%	6.1	0	>1050	400	-	-	-	9.7	10.3
New Repton Materials
Brand	Composition	Density G/cm3	Porosity %	Bend Strength MPa	Spall Resist °C	Hot Creep Test mm Def@C°			Thermal exp ppm/C°		Features
Brand	Composition	Density G/cm3	Porosity %	Bend Strength MPa	Spall Resist °C	1400	1500	1550	@300	@900	Features
902	Cordierite 2Mg 2Al 5SiOx	1.5	35	>35	850	1	13	-	0.2	1
914	Magnesia MgO	3.1	11	>98	300	-	-	-	12	14
922	Yttria Y203	2.0	60	>7	-	-	-	-	-	-
EXP 386	Aluminum Titanate	2.7	14	>25	1000	-	-	-	0.0	1.7
931	Cordierite 2Mg 2Al 5SiOx	1.4	44	>19	750	1	15.5	-	0.1	2
EXP 22	Magnesia	3.4	0.1	>89	350	-	-	-	11.2	13.2
EXP 48	Cordierite 2Mg 2Al 5SiOx	2.3	0.6	>66	750	1	4	-	1	2
EXP 93	Cordierite Mullite	2.2	25	-	900	-	-	-	-	-
EXP 36	Cordierite + Mullite	1.9	32	-	950	-	-	-	6	7.8
EXP 336	Alumina 99.6%	1.0	70	>11	350	1	4	11	6.6	8	High porosity
EXP 383	Alumina 96%	3.7	0	>275	-	-	-	-	-	-
Testing Notes: Spalling Test: A 200 x 200 x 2 mm test specimen is supported at the corners by 25 pillars. A 50 gram weight is placed in the center and the plate and pillars are inserted and removed from a furnace at temperature. The highest temperature where no cracking occurs after 5 cycles is determined to be the Spall Resistant Temperature. Hot Creep Test: A 180 x 25 x 2 mm specimen is supported across a 160 mm span with a 35 gram load placed at the center of the specimen. The specimen is heated for 5 hours at several temperatures and the deflection in mm is measured and recorded.
Repton Data Tables (pdf 200k)

MarkeTech Product Sites:

Alumina - Ceramics - Crystals - Heat Sinks - Metals - Products - Sapphire - Scintillators -Tungsten