Abstract: The object is to provide a high-purity magnesium oxide particle aggregate that is redispersible and can be supplied with keeping high purity, and a method for producing the same. A magnesium oxide particle aggregate that is an aggregate of magnesium oxide particles, wherein the magnesium oxide particles have an average particle size of 1 ?m or less, and comprises Si, Al, Ca, Fe, V, Cr, Mn, Ni, Zr, B and Zn as impurities in their respective amounts of 10 ppm by mass or less, wherein the total amount of the impurities is 100 ppm by mass or less.

Abstract: The object is to provide a high-purity magnesium oxide particle aggregate that is redispersible and can be supplied with keeping high purity, and a method for producing the same. A magnesium oxide particle aggregate that is an aggregate of magnesium oxide particles, wherein the magnesium oxide particles have an average particle size of 1 ?m or less, and comprises Si, Al, Ca, Fe, V, Cr, Mn, Ni, Zr, B and Zn as impurities in their respective amounts of 10 ppm by mass or less, wherein the total amount of the impurities is 100 ppm by mass or less.

Abstract: A metal hydroxide solid solution and a metal oxide solid solution, wherein the crystal form is an octahedron comprising upper and lower parallel basal planes and six peripheral pyramidal planes, the pyramidal planes consisting of upward-inclined planes and downward-inclined planes which are alternatively located. The ratio of the major axis diameter of the basal plane to the thickness between the upper and lower basal planes (major axis diameter/thickness) if 1 to 9. This improves fluidity, processability and the like when the solid solutions are kneaded into resins and the like.

Abstract: A linear-type shuttle has an air pad 4 that blows air toward a track 5, a chassis 2 that floats above the track 5 due to the air pad 4, a primary side 6a of a linear motor that is installed to be vertically movable on the chassis 2 and that drives the chassis horizontally together with a secondary side 6b on the track 5, a brake skid 11 disposed on the chassis 2 that makes friction contact with the track 5 when the chassis 2 is not floating above the track 5, an operating lever 17 pivotally mounted to the chassis 2 and having one end connected to the primary side 6a, a spring 23 that always forces the primary side 6a upward away from the secondary side 6b via the lever 17, and an electromagnet 20 that moves the primary side 6a downward via the lever 17 against the force of the spring 23 to a predetermined position in relation to the secondary side 6b, such that, when the car 1 is floating, the gap 60 between the primary side 6a and the secondary side 6b of a linear motor is as narrow as possible so that the l

Abstract: By hydrating a metal oxide solid solution shown as the following formula (3), wherein an average primary crystal particle diameter is in the range of 1 to 10 .mu.m, in the presence of monocarboxylic acid and/or oxymonocarboxylic acid in aqueous medium,Mg.sub.1-z M.sup.2+.sub.z O (3)in which M.sup.2+ represents at least one divalent metal ion selected from the group consisting of Mn.sup.2+, Fe.sup.2+, Co.sup.2+, Ni.sup.2+, Cu.sup.2+ and Zn.sup.2+, and z is in the range of 0.01.ltoreq.z<0.5, a metal hydroxide solid solution having a high aspect ratio shown as the following formula (1) can be obtained;Mg.sub.1-x M.sup.2+.sub.x (OH).sub.2 (1)in which M.sup.2+ represents at least one divalent metal ion selected from the group consisting of Mn.sup.2+, Fe.sup.2+, Co.sup.2+, Ni.sup.2+, Cu.sup.2+ and Zn.sup.2+, and x is in the range of 0.01.ltoreq.x<0.5, characterized by that a crystal is a hexagonal plate in shape, 0.01 to 0.5 .mu.m in average thickness, 1 to 10 .mu.

Abstract: A door lock mechanism for a sliding door is provided comprising a pivotly mounted first lock member, a second lock member, and a mechanism for selectively engaging the first lock member. The mechanism for selectively engaging the first lock member may be operated to pivot the first lock member away from the second lock member, thereby uncoupling the lock members and permitting the sliding door to be opened.