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US 6,599,647 B2Granted
Joined insulator body
AssigneeNGK Insulators, Ltd.
InventorsNoriyasu Oguri, Osamu Imai, Hironori Suzuki
Life of this patent
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AssigneeNGK Insulators, Ltd.
InventorsNoriyasu Oguri, Osamu Imai, Hironori Suzuki
Estimating the term…
Alumina cement mortar is used as a source material for a kneaded cement cured body for joining hardware onto an insulator body, whereby the insulator can maintain high initial and long term mechanical strength and high electrical strength over a long period of time, and the curing time for forming the cured body is shortened to reduce the cost of producing the insulator. The alumina cement mortar is formed by kneading a mixture of alumina cement particles having a specific surface area of at least 3500 cm2/g, a polymer-steric-hindrance type water reducing agent, an aggregate, and water, or an alumina cement mortar is obtained by kneading a mixture of alumina cement particles having an amorphous phase on an outer peripheral surface of particles and having a specific surface area of at least 3500 cm2/g, a water reducing agent, an aggregate, and water.
An insulator comprising an insulator body and a hardware member joined to at least one side of said insulator body via a kneaded cement cured body, said kneaded cement cured body comprising a cement paste formed by kneading a mixture of alumina cement particles having a specific surface area of at least 3500 cm2/g and having an amorphous phase of at least 10 nm thickness on an outer peripheral surface of said particles, a water reducing agent, and water, said cement paste being cured in a wet state and at a temperature of 40° C. or higher to form said cured body.
An insulator comprising an insulator body and a hardware member joined to at least one side of said insulator body via a kneaded cement cured body, said kneaded cement cured body comprising a cement mortar formed by kneading a mixture of alumina cement particles having a specific surface area of at least 3500 cm2/g and having an amorphous phase of at least 10 nm thickness on an outer peripheral surface of said particles, a water reducing agent, an aggregate, and water, said cement mortar being cured in a wet state and at a temperature of 40° C. or higher to form said cured body.
An insulator comprising an insulator body and a hardware member joined to at least one side of said insulator body via a kneaded cement cured body, said kneaded cement cured body comprising a cement paste formed by kneading a mixture of alumina cement particles having a specific surface area of at least 3500 cm2/g, a polymer-steric-hindrance water reducing agent, and water, said cement paste being cured in a wet state and at a temperature of 40° C. or higher to form said cured body.
An insulator comprising an insulator body and a hardware member joined to at least one side of said insulator body via a kneaded cement cured body, said kneaded cement cured body comprising a cement mortar formed by kneading a mixture of alumina cement particles having a specific surface area of at least 3500 cm2/g, a polymer-steric-hindrance water reducing agent, an aggregate, and water, said cement mortar being cured in a wet state and at a temperature of 40° C. or higher to form said cured body.
Dependencies are inferred from the claim text.