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Patent US3962145A successfully refreshed from Google Patents.
US3962145A
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High temperature thermistor composition
Assignee: Panasonic Holdings Corp
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Filing: 1974-06-18
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Granted: 1976-06-08
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Expires: 1994-06-18
Abstract
Abstract A high temperature thermistor composition comprising essentially a spinel-type solid solution being formed from a unity in the sum of a molar fraction of at least one oxide selected from the group consisting of magnesium oxide, nickel oxide, cobalt oxide, manganese oxide and zinc oxide and a unity in the sum of a molar fraction of aluminum oxide, chromium oxide, and at least one oxide selected from the group consisting of iron oxide, manganese oxide, cobalt oxide and antimony oxide.
Inventors
- 👤 Yoshihiro Matsuo
- 👤 Shigeru Hayakawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:04
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; G; G01; G01K; G01K7/00; G01K7/16; G01K7/22; H; H01; H01C; H01C7/00; H01C7/04; H01C7/042; H01C7/043
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
99 words
A high temperature thermistor composition comprising a spinel-type solid solution having the chemical formula of (Mg.sub.[ p .sbsb.1 ]Ni .sub.[ p .sbsb.2 ]Co .sub.[ p .sbsb.3 ]Mn .sub.[ p .sbsb.4 ]Zn .sub.[ p .sbsb.5 ] ) (Al.sub.[ x ]Cr .sub.[ y ]Fe .sub.[ z .sbsb.1 ]Mn .sub.[ z .sbsb.2 ]Co .sub.[ z .sbsb.3.sub.]Sb.sub.[ z .sbsb.4 ] ) 2 O 4 , wherein p 1 +p 2 +p 3 +p 4 +p 5 =1, 0≦p n ≦1 (n=1, 2, 3, 4, 5), z 1 +z 2 +z 3 +z 4 =z, x+y+z=1, 0.005≦x≦0.80, 0.03≦y≦0.95, 0.005≦z≦0.70 and 0≦z n ≦0.70 (n=1,2,3,4).
Claim 2
Dependent Claim
99 words
A high temperature thermistor composition comprising a spinel-type solid solution having the chemical formula of (Mg.sub.[ p .sbsb.1 ]Ni .sub.[ p .sbsb.2 ]Co .sub.[ p .sbsb.3 ]Mn .sub.[ p .sbsb.4 ]Zn .sub.[ p .sbsb.5 ] ) (Al.sub.[ x ]Cr .sub.[ y ]Fe .sub.[ z .sbsb.1 ]Mn .sub.[ z .sbsb.2 ]Co .sub.[ z .sbsb.3.sub.]Sb.sub.[ z .sbsb.4 ] ) 2 O 4 , wherein p 1 +p 2 +p 3 +p 4 +p 5 =1, 0≦p n ≦1 (n=1, 2, 3, 4, 5), z 1 +z 2 +z 3 +z 4 =z, x+y+z=1, 0.005≦x≦0.80, 0.03≦y≦0.95, 0.005≦z≦0.70 and 0≦z n ≦0.70 (n=1,2,3,4).
Claim 3
Dependent Claim
95 words
A high temperature thermistor composition as claimed in claim 1, wherein said spinel-type solid solution having a chemical formula of A (Al x Cr y B z ) 2 O 4 wherein A stands for a metal selected from the group consisting of Mg, Ni, Co, Mn and Zn, and B stands for a metal selected from the group consisting of Fe, Mn, Co and Sb, and x ranges from 0.005 to 0.80, y ranges from 0.03 to 0.95, z ranges from 0.005 to 0.70, and the sum of x, y and z is unity.
Claim 4
Dependent Claim
103 words
A high temperature thermistor composition as claimed in claim 1, wherein said spinel-type solid solution in a chemical formula of (Mg 1-p A p )(Al x Cr y B z ) 2 O 4 wherein A stands for a metal selected from the group consisting of Ni, Co, Mn and Zn, and B stands for a metal selected from the group consisting of Fe, Mn, Co and Sb, and p ranges from 0.001 to 0.999, x ranges from 0.005 to 0.80, y ranges from 0.03 to 0.95, z ranges from 0.005 to 0.70, and the sum of x, y and z is unity.
Claim 5
Dependent Claim
101 words
A high temperature thermistor composition as claimed in claim 1, wherein said spinel-type solid solution in a chemical formula of (Ni 1-p A p )(Al.sub. x Cr y B z ) 2 O 4 wherein A stands for a metal selected from the group consisting of Co, Mn and Zn, and B stands for metal selected from the group consisting of Fe, Mn, Co and Sb, and p ranges from 0.001 to 0.999, x ranges from 0.005 to 0.80, y ranges from 0.03 to 0.95, z ranges from 0.005 to 0.70, and the sum of x, y and z is unity.
Claim 6
Dependent Claim
101 words
A high temperature thermistor composition as claimed in claim 1, wherein said spinel-type solid solution in a chemical formula of (Co 1-p A p )(Al.sub. x Cr y B z ) 2 O 4 wherein A stands for a metal selected from the group consisting of Mn and Zn, and B stands for a metal selected from the group consisting of Fe, Mn, Co and Sb, and p ranges from 0.001 to 0.999, x ranges from 0.005 to 0.80, y ranges from 0.03 to 0.95, z ranges from 0.005 to 0.70 and the sum of x, y and z is unity.
Claim 7
Dependent Claim
92 words
A high temperature thermistor composition as claimed in claim 1, wherein said spinel-type solid solution in a chemical formula of (Zn.sub.[ 1 -p ]Mn .sub.[31 p ] )(Al.sub.[ x ]Cr .sub.[ y ]B .sub.[ z ] ) 2 O 4 wherein B stands for a metal selected from the group consisting of Fe, Mn, Co and Sb, and p ranges from 0.001 to 0.999, x ranges from 0.005 to 0.80, y ranges from 0.03 to 0.95, z ranges from 0.005 to 0.70, and the sum of x, y and z is unity.
Claim 8
Dependent Claim
122 words
A high temperature thermistor compositon as claimed in claim 1, wherein said spinel-type solid solution in a chemical formula of (Mg 1 -p -q Ni p A q )(Al.sub. x Cr y B z ) 2 O 4 wherein A stands for a metal selected from the group consisting of Co, Mn and Zn, and B stands for a metal selected from the group consisting of Fe, Mn, Co and Sb, and p ranges from 0.001 to 0.999, q ranges from 0.0005 to 0.998, the sum of p and q is smaller than unity, x ranges from 0.005 to 0.80, y ranges from 0.03 to 0.95, z ranges from 0.005 to 0.70, and the sum of x, y and z is unity.
Claim 9
Dependent Claim
120 words
A high temperature thermistor composition as claimed in claim 1, wherein said spinel-type solid solution in a chemical formula of (Ni 1 -p -q Co p A g )(Al.sub. x Cr y B z ) 2 O 4 wherein A stands for a metal selected from the group consisting of Mn and Zn, B stands for a metal selected from the group consisting of Fe, Mn, Co and Sb, and p ranges from 0.001 to 0.999, q ranges from 0.0005 to 0.998, the sum of p and q is smaller than unity, x ranges from 0.005 to 0.80, y ranges from 0.03 to 0.95, z ranges from 0.005 to 0.70, and the sum of x, y and z is unity.
Claim 10
Dependent Claim
102 words
A high temperature thermistor composition as claimed in claim 1, wherein said spinel-type solid solution in a chemical formula of A (Al x Cr y Fe z -w B w ) 2 O 4 wherein A stands for a metal selected from the group consisting of Mg, Ni, Co, Mn and Zn, B stands for a metal selected from the group consisting of Mn, Co and Sb, and x ranges from 0.005 to 0.80, y ranges from 0.03 to 0.95, z ranges from 0.005 to 0.70, w ranges from 0.001 to 0.699, and the sum of x, y and z is unity.
Claim 11
Dependent Claim
111 words
A high temperature thermistor composition as claimed in claim 1, wherein said spinel-type solid solution in a chemical formula of (Mg 1 -p A p )(Al.sub. x Cr y Fe z -w B w ) 2 O.sub. 4 wherein A stands for )(Al metal selected from the group consisting of Ni, Co, Mn and Zn, B stands for a metal selected from the group consisting of Mn, Co and Sb, and p ranges from 0.001 to 0.999, x ranges from 0.005 to 0.80, y ranges from 0.03 to 0.95, z ranges from 0.005 to 0.70, w ranges from 0.001 to 0.669 and the sum of x, y and z is unity.
Claim 12
Dependent Claim
109 words
A high temperature thermistor composition as claimed in claim 1, where in said spinel-type solid solution in a chemical formula of (Ni 1 -p A p ()Al.sub. x Cr y Fe z -w B.sub. w) 2 O 4 wherein A stands for a metal selected from the group consisting of Co, Mn and Zn, B stands for a metal selected from the group consisting of Mn, Co and Sb, and p ranges from 0.001 to 0.999 x ranges 0.005 to 0.80, y ranges from 0.03 to 0.95, z ranges from 0.005 to 0.70, w ranges from 0.001 to 0.699, and the sum of x, y and z is unity.
Claim 13
Dependent Claim
108 words
A high temperature thermistor composition as claimed in claim 1, wherein said spinel-type solid solution in a chemical formula of (Co 1 -p A p )(Al.sub. x Cr y Fe z -w B w ).sub. 2 O 4 wherein A stands for a metal selected from the group consisting of Mn and Zn, B stands for a metal selected from the group consisting of Mn, Co and Sb and p ranges from 0.001 to 0.999, x ranges 0.005 to 0.80, y ranges from 0.03 to 0.95, z ranges from 0.005 to 0.70, w ranges from 0.001 to 0.699, and the sum of x, y and z is unity.
Claim 14
Dependent Claim
95 words
A high temperature thermistor composition as claimed in claim 1, wherein said spinel-type solid solution in a chemical formula of (Zn 1 -p Mn p )(Al.sub. x Cr y Fe z -w B w ) 2 O 4 wherein B stands for a metal selected from the group consisting of Mn, Co and Sb and p ranges from 0.001 to 0.999, x ranges from 0.005 to 0.80, y ranges from 0.03 to 0.95, z ranges form 0.005 to 0.70, w ranges from 0.001 to 0.699, and the sum of x, y and z is unity.
Claim 15
Dependent Claim
129 words
A high temperature thermistor composition as claimed in claim 1, wherein said spinel-type solid solution in a chemical formula of (Mg 1 -p -q Ni p A q )(Al.sub. x Cr y Fe z -w B w ) 2 O 4 wherein A stands for a metal selected from the group consisting of Co, Mn and Zn, B stands for a metal selected from the group consisting of Mn, Co and Sb, and p ranges from 0.001 to 0.999, q ranges from 0.0005 to 0.998, the sum of p and q is smaller than unity, x ranges from 0.005 to 0.80, y ranges from 0.03 to 0.95, z ranges from 0.005 to 0.70, w ranges from 0.001 to 0.699, and the sum of x, y and z is unity.
Claim 16
Dependent Claim
127 words
A high temperture thermistor composition as claimed in claim 1, wherein said spinel-type solid solution in a chemical formula of (Nil.sub. -p -q Co p A g )(Al.sub. x Cr y Fe z -w B w ) 2 O 4 wherein A stands for a metal selected from the group consisting of, Mn and Zn, B stands for a metal selected from the group consisting of Mn, Co and Sb, and p ranges from 0.001 to 0.999, q ranges from 0.0005 to 0.998, the sum of p and q is smaller than unity, x ranges from 0.005 to 0.80, y ranges from 0.03 to 0.95, z ranges from 0.005 to 0.70, w ranges from 0.001 to 0.699, and the sum of x, y and z is unity.
Claim 17
Dependent Claim
110 words
A high temperature themistor composition comprising more than 80 molar percent of a spinel-type solid solution in a chemical formula of A (Al x Cr y B z ) 2 O 4 and less than 20 molar percent of an oxide in a chemical formula of AO, wherein A stands for metal selected from the group consisting of Mg, Ni, Co, Mn and Zn, and B stands for a metal selected from the group consisting of Fe, Mn, Co and Sb, and x ranges from 0.005 to 0.80, y ranges from 0.03 to 0.95, z ranges from 0.005 to 0.70, and the sum of x, y and z is unity.
Claim 18
Dependent Claim
110 words
A high temperature themistor composition comprising more than 80 molar percent of a spinel-type solid solution in a chemical formula of A (Al x Cr y B z ) 2 O 4 and less than 20 molar percent of an oxide in a chemical formula of AO, wherein A stands for metal selected from the group consisting of Mg, Ni, Co, Mn and Zn, and B stands for a metal selected from the group consisting of Fe, Mn, Co and Sb, and x ranges from 0.005 to 0.80, y ranges from 0.03 to 0.95, z ranges from 0.005 to 0.70, and the sum of x, y and z is unity.
Claim 19
Dependent Claim
142 words
A high temperature thermistor composition comprising more than 80 molar percent of a spinel-type solid solution in a chemical formula of A (Al x Cr y B z ) 2 O 4 and less than 20 molar percent in the sum of the amounts of Al 2 O 3 , Cr 2 O 3 and an oxide in a chemical formula of B 2 O 3 which are in a molar fraction of x, y and z, respectively, wherein A stands for a metal selected from the group consisting of Mg, Ni, Co, Mn and Zn, and B stands for a metal selected from the group consisting of Fe Mn, Co and Sb, and x ranges from 0.005 to 0.80, y ranges from 0.03 to 0.95, z ranges from 0.005 to 0.70, and the sum of x, y and z is unity.
Claim 20
Dependent Claim
142 words
A high temperature thermistor composition comprising more than 80 molar percent of a spinel-type solid solution in a chemical formula of A (Al x Cr y B z ) 2 O 4 and less than 20 molar percent in the sum of the amounts of Al 2 O 3 , Cr 2 O 3 and an oxide in a chemical formula of B 2 O 3 which are in a molar fraction of x, y and z, respectively, wherein A stands for a metal selected from the group consisting of Mg, Ni, Co, Mn and Zn, and B stands for a metal selected from the group consisting of Fe Mn, Co and Sb, and x ranges from 0.005 to 0.80, y ranges from 0.03 to 0.95, z ranges from 0.005 to 0.70, and the sum of x, y and z is unity.
Claim 21
Dependent Claim
140 words
A high temperature thermistor composition comprising more than 80 molar percent of a spinel-type solid solution in a chemical formula of (Mg 1 -p A p )(Al.sub. x Cr y B z ) 2 O 4 and less than 20 molar percent in the sum of the amounts of MgO and an oxide in a chemical formula of AO which are in a molar fraction of 1-p and p, respectively, wherein A stands for a metal selected from the group consisting of Mg, Ni, Co, Mn and Zn, and B stands for a metal selected from the group consisting of Fe, Mn, Co and Sb, and p ranges from 0.001 to 0.999, x ranges from 0.005 to 0.80, y ranges form 0.03 to 0.95 z ranges from 0.005 to 0.70, and the sum of x, y and z is unity.
Claim 22
Dependent Claim
140 words
A high temperature thermistor composition comprising more than 80 molar percent of a spinel-type solid solution in a chemical formula of (Mg 1 -p A p )(Al.sub. x Cr y B z ) 2 O 4 and less than 20 molar percent in the sum of the amounts of MgO and an oxide in a chemical formula of AO which are in a molar fraction of 1-p and p, respectively, wherein A stands for a metal selected from the group consisting of Mg, Ni, Co, Mn and Zn, and B stands for a metal selected from the group consisting of Fe, Mn, Co and Sb, and p ranges from 0.001 to 0.999, x ranges from 0.005 to 0.80, y ranges form 0.03 to 0.95 z ranges from 0.005 to 0.70, and the sum of x, y and z is unity.
Claim 23
Dependent Claim
152 words
A high temperature thermistor composition comprising more than 80 molar percent of a spinel-type solid solution in a chemical formula of (Mg 1 -p A p )(Al.sub. x Cr y B z ) 2 O 4 and less than 20 molar percent in the sum of the amounts of Al 2 O 3 , Cr 2 O 3 and an oxide in a chemical formula of B 2 O 3 which are in a molar fraction of x, y and z, respectively, wherein A stands for a metal selected from the group consisting of Mg, Ni, Co, Mn and Zn, and B stands for a metal selected from the group consisting of Fe, Mn, Co and Sb, and p ranges from 0.001 to 0.999, x ranges from 0.005 to 0.80, y ranges from 0.03 to 0.95, z ranges from 0.005 to 0.70, and the sum of x, y and z is unity.
Claim 24
Dependent Claim
152 words
A high temperature thermistor composition comprising more than 80 molar percent of a spinel-type solid solution in a chemical formula of (Mg 1 -p A p )(Al.sub. x Cr y B z ) 2 O 4 and less than 20 molar percent in the sum of the amounts of Al 2 O 3 , Cr 2 O 3 and an oxide in a chemical formula of B 2 O 3 which are in a molar fraction of x, y and z, respectively, wherein A stands for a metal selected from the group consisting of Mg, Ni, Co, Mn and Zn, and B stands for a metal selected from the group consisting of Fe, Mn, Co and Sb, and p ranges from 0.001 to 0.999, x ranges from 0.005 to 0.80, y ranges from 0.03 to 0.95, z ranges from 0.005 to 0.70, and the sum of x, y and z is unity.
References Cited (Backward Citations)
US3510820A
Cited
US3615775A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-08 | 1979-12-08 | 1980-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-08 | 1983-12-08 | 1984-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-08 | 1987-12-08 | 1988-06-08 | $7700.00 | Window Closed / Lapsed |