Compositions: ceramic – Ceramic compositions – Refractory
Patent
1998-05-18
2000-05-23
Group, Karl
Compositions: ceramic
Ceramic compositions
Refractory
133153, 133154, C04B 3519
Patent
active
060665858
ABSTRACT:
A ceramic material in the lithium aluminosilicate (LAS) system, having a negative coefficient of thermal expansion and improved mechanical properties, the material having a stoichiometric composition of Li.sub.1+X AlSiO.sub.4+X/2, where 0.ltoreq.x.ltoreq.0.1. The ceramic material can be made by mixing silicon and aluminum oxides (SiO.sub.2 and Al.sub.2 O.sub.5) with lithium carbonate (Li.sub.2 CO.sub.3) and calcining the mixture. Alternatively, the ceramic material can be made by mixing silicon oxide (SiO.sub.2), lithium aluminate (LiAlO.sub.2), and, if desired, lithium carbonate (Li.sub.2 CO.sub.3), and calcining the mixture. Alternatively, the ceramic material can be made by mixing spodumene (an inexpensive mineral with a nominal composition of LiAlSi.sub.2 O.sub.6), lithium aluminate (LiAlO.sub.2), and the required amounts of other constituents (Li.sub.2 CO.sub.3, Al.sub.2 O.sub.3, or SiO.sub.2), and calcining the mixture. Alternatively, the ceramic material can be made by mixing spodumene (nominally LiAlSi.sub.2 O.sub.6) and the required amounts of other constituents (Li.sub.2 CO.sub.3, Al.sub.2 O.sub.3, or SiO.sub.2), and calcining the mixture. The ceramics of this invention exhibit negative thermal expansion, and improved mechanical properties, which allow them to be used as components of thermostats and other products.
REFERENCES:
patent: 3647489 (1972-03-01), McMillan et al.
patent: 3754947 (1973-08-01), Burkert et al.
patent: 5320792 (1994-06-01), Wu et al.
patent: 5545427 (1996-08-01), Boilot et al.
Biefeld et al., Effects Of Composition Changes, Substitutions, And Hydrostatic Pressure On The Ionic Conductivity In Lithium Aluminosilicate And Related Beta-Eucryptite Materials, J. Electrochem. Soc.: Electrochemical Science And Technology, 125(2):179-185 (1978) (No month).
Buchanan et al., Properties Of Hot-Pressed Zirconium Pyrovanadate Ceramics, J. Electrochem. Soc: Solid-State And Technology, 130(9):1905-1910 (1983) (No month).
Bush et al., High-Temperature Mechanical Properties Of Ceramic Materials: II, Beta-Eucryptite, Journal Of The American Ceramic Society, 42(8):388-391 (1959) (No month).
Chu et al., Negative Thermal Expansion Ceramics: A Review, Materials Science And Engineering, 95:303-308 (1987) (No month.
Gillery et al., Thermal Contraction of .beta.-Eucryptite (Li.sub.2 O.multidot.Al.sub.2 O.sub.3 .multidot.2SiO.sub.2) By X-Ray And Dilatometer Methods, Journal Of The American Ceramic Society, 42(4):175-177 (1959) (No month).
Haghighat et al., Processing And Sintering Of Sol-Gel Derived Lithium Aluminosilicate Powders, Ceram. Eng. Sci. Proc., 10(7-8):707-719 (1989) (No month).
Hochella, Jr., et al., Structural Mechanisms Of Anomalous Thermal Expansion Of Cordierite-Beryl And Other Framework Silicates, Journal Of The American Ceramic Society, 69(1):13-18 (1986) (No month).
F.A. Hummel, Significant Aspects Of Certain Ternary Compounds And Solid Solutions, Journal Of The American Ceramic Society, 35(3):64-66 (1952) (No month).
F.A. Hummel, Thermal Expansion Properties Of Some Synthetic Lithia Minerals, Journal Of The American Ceramic Society, 34(8):235-239 (1951) (No month).
Ishitsuka et al., Synthesis And Thermal Stability Of Aluminum Titanate Solid Solutions, Journal Of The American Ceramic Society, 70(2):69-71 (1987) (No month).
Kim et al., Formation And Characteristics Of Silicon Nitride-Lithium Aluminum Silicate Ceramics: Part I, Sintering And Microstructure, Advanced Ceramic Materials, 2(4):817-821 (1987) (No month).
Knickerbocker et al., Sinterable .beta.-Spoddumene Glass-Ceramics, Journal Of The American Ceramic Society, 72(10):1873-1879 (1989) (No month).
Kobayashi et al., Preparation Of .beta.-Spodumene Powder By Sol-Gel Process And Properties Of Sintered Bodies, Journal Of The Ceramic Society Of Japan, Int. Edition, 98-710:90-95 1990 (No month).
Korthuis et al., Negative Thermal Expansion And Phase Transitions In The ZrV.sub.2--x P.sub.x O.sub.7 Series, Chem. Mater., 7:412-417 (1995) (No month).
Limaye et al., Synthesis And Thermal Expansion Of MZr.sub.4 P.sub.6 O.sub.24 (M=Mg,Ca,Sr,Ba), Journal Of The Ceramic Society, 70(10):C232-C236 (1987) (No month).
Omori et al., Low-Expansion Ceramics In Zirconium Phosphate Systems, Materials Science Forum, 34-36:851-856 (1988) (No month).
Oota et al., Thermal Expansion Behavior of NaZr.sub.2 (PO.sub.4).sub.3- Type Compounds, Journal Of The American Ceramic Society, 69(1):1-6 (1986) (No month).
Ostertag et al., Thermal Expansion Of Synthetic .beta.-Spodumene and .beta.-Spodumene-Silica Solid Solutions, Journal Of The American Ceramic Society, 51(11):651-654 (1968) (No month).
Ota et al., Electrical Conductivity And Thermal Expansion of Nb.sub.2 O.sub.5 Ceramics, Advanced Ceramic Materials, 1(4):371-377 (1986) (No month).
Fred J. Parker, Al.sub.2 TiO.sub.5 -ZrTiO.sub.4 -ZrO.sub.2 Composites: A New Family Of Low-Thermal-Expansion Ceramics, Journal Of The American Ceramic Society, 73(4):929-932 (1990) (No month).
Roy et al., Compositonal And Stability Relationships Among The Lithium Aluminosilicates: Eucryptite, Spodumene, And Petalite, Journal Of The American Ceramic Society, 33(5):152-159 (1950) (No month).
Roy et al., Very Low Thermal Expansion Coefficient Materials, Annu. Rev. Mater. Sci., 19:59-81 (1989) (No month).
H. Schulz, Thermal Expansion Of Beta Eucryptite, Journal Of The American Ceramic Society, 57(7):313-318 (1974) (No month).
Edward J. Smoke, Ceramic Compositions Having Negative Linear Thermal Expansion, Journal Of The American Ceramic Society, 34(3): 87-90 (1951) (No month).
Tien et al., Studies In Lithium Oxide Systems, XIII, Li.sub.2 O.multidot.Al.sub.2 O.sub.3 .multidot.2SiO.sub.2 --Li.sub.2 O.multidot.Al.sub.2 O.sub.3 .multidot.2GeO.sub.2, Journal Of The American Ceramic Society, 47(11):582-584 (1964) (No month).
Tindwa et al., Ionic Conductivities Of Phosphorous-Substituted .beta.-Eucryptite Ceramics, 17(7):873-881 (1982) (No month).
Wohlfromm et al., Effect Of ZrSiO.sub.4 And MgO Additions On Reaction Sintering And Properties Of Al.sub.2 TiO.sub.5 -Based Materials, Journal Of Materials Science, 25:3753-3764 (1990) (No month).
E.G. Wolff, Thermal Expansion In Metal/Lithia-Alumina-Silica (LAS) Composites, International Journal Of Thermophysics, 9(2):221-232 (1988) (No month).
Wu et al., Low-Thermal Expansion Polycrystalline Tantalum Tungstate Ceramics, Journal Of Materials Science, 22:2816-2822 (1987) (No month).
Yamai et al., Low-Thermal-Expansion Polycrystalline Zirconyl Phosphate Ceramic, Journal Of The American Ceramic Society, 68(5):273-278 (1985) (No month).
Yamai et al., Low-Thermal-Expansion Polycrystalline Zirconyl Phosphate Ceramic: Solid-Solution And Microcracking-Related Properties, Journal Of The American Ceramic Society, 70(8): 585-590 (1987) (No month).
Emerson Electric Co.
Group Karl
Sample David
LandOfFree
Ceramics having negative coefficient of thermal expansion, metho does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ceramics having negative coefficient of thermal expansion, metho, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ceramics having negative coefficient of thermal expansion, metho will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1836938