Question:
Thermistors are generally sintered mixtures of:
Thermistors are generally sintered mixtures of:
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Commercial ceramic thermistors are semiconductor devices formed by sintering mixtures of transition metal oxides and sulphides (such as manganese, nickel, and cobalt).
Updated On: Jun 23, 2026
- Sulphides and oxalates of nickel, cobalt and manganese
- Sulphides and oxides of nickel, cobalt and manganese
- Oxalates and phosphates of nickel, cobalt and manganese
- Phosphates and oxides of nickel, cobalt and manganese
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The Correct Option is B
Solution and Explanation
Concept:
A thermistor (thermally sensitive resistor) is a solid-state temperature transducer whose electrical resistance changes predictably with temperature. Thermistors are categorized into Negative Temperature Coefficient (NTC) types, where resistance decreases as temperature increases, and Positive Temperature Coefficient (PTC) types. Most industrial and biomedical NTC thermistors are fabricated from semiconductor materials.
Step 1: Identifying the material composition.
Thermistors are manufactured by blending specific combinations of transition metal chemistry components. These raw materials typically consist of the oxides and sulphides of metals such as Nickel (Ni), Cobalt (Co), Manganese (Mn), Iron (Fe), and Copper (Cu).
Step 2: Reconsidering the manufacturing process.
During manufacturing, these metal oxides and sulphides are milled into a fine powder, mixed with plastic binders, shaped into desired geometries (such as beads, disks, or rods), and then subjected to a high-pressure, high-temperature thermal process known as sintering. This process fuses the powders into a dense semiconductor ceramic body. Reviewing the choices, Option (B) correctly identifies sulfides and oxides as the foundational components, validating the selection.
Step 1: Identifying the material composition.
Thermistors are manufactured by blending specific combinations of transition metal chemistry components. These raw materials typically consist of the oxides and sulphides of metals such as Nickel (Ni), Cobalt (Co), Manganese (Mn), Iron (Fe), and Copper (Cu).
Step 2: Reconsidering the manufacturing process.
During manufacturing, these metal oxides and sulphides are milled into a fine powder, mixed with plastic binders, shaped into desired geometries (such as beads, disks, or rods), and then subjected to a high-pressure, high-temperature thermal process known as sintering. This process fuses the powders into a dense semiconductor ceramic body. Reviewing the choices, Option (B) correctly identifies sulfides and oxides as the foundational components, validating the selection.
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